IL300269A - A system and method for dispersing charged particles - Google Patents

Description

1 SYSTEM AND METHOD OF DISPENSING CHARGED PARTICLES FIELD OF THE INVENTION [001] The present invention relates generally to systems and methods for dispensing charged particles. More specifically, the present invention relates to systems and methods for dispensing charged particles toward a target.

BACKGROUND OF THE INVENTION [002] Dispensing charged particles (e.g., from millimeter-size particles to micron-size particles) toward a target may have several important uses. The charged particles are usually dispensed from a dispenser mounted on a support and configured to direct the charged particles toward the target in order to attract the charged particles. The target may either be grounded or charged with an opposite charge to the charged particles. Unlike dispensing non-charged particles, the charged particles may electrostatically be drawn to the target. [003] For example, artificial pollination of cultivated trees or shrubs by pollen, utilizes charged pollen particles in order to increase the probability of the pollen reaching the cultivated trees or shrubs. [004] In another example, chemical reactors utilizing a chemical reaction between aerosols and a gas phase may benefit from charging the aerosol particles, thus better controlling the movement of the aerosol particles inside the reactor. [005] In yet another example, sandblasting, specifically used for cleaning of large metallic bodies, such as ships, may also benefit from charging the sand particles thus directing them toward the ship or specific areas in the body of the ship. [006] However, such systems are sensitive to ambient conditions, such as, wind, humidity, pressure changes, temperature changes, and the like. [007] Therefore, there is a need for systems and methods of dispensing charged particles that include the possibility to modify the effect of the ambient conditions on the particle and the one or more targets".

SUMMARY OF THE INVENTION [008] Some aspects of the invention may be directed to a charged particles dispensing system, comprising: a portable support; two or more charged particle dispensing units, mounted to the portable support; and one or more deployable sails connected to the portable 2 support. In some embodiments, each charged particles dispensing unit, comprises: particles provision unit; particles charging unit, for charging particles; and for providing gas flow to the charged particles; wherein the one or more deployable sails, when at least partially deployed, are configured to modify the effect of ambient conditions on a flow of charged particle and one or more targets". [009] In some embodiments, two or more charged particle dispensing units directs the flow of particles towards the one or more targets. In some embodiments, at least one target form the one or more targets is a charged target. In some embodiments, the system may include two or more deployable sails. In some embodiments, the one or more charged particle dispensing units are mounted between the two or more sails. [0010] In some embodiments, the one or more charged particle dispensing units are integrated in the one or more deployable sails. In some embodiments, an exit for the flow of charged particles is located between the one or more deployable sails and one or more targets. In some embodiments, the one or more sails are configured to be deployed, such that a surface of at least one of the one or more sails is substantially parallel to the direction of the flow of charged particles. In some embodiments, during operation the one or more charged particle dispensing units are located above one or more targets. In some embodiments, the system further comprising at least one sail located on at least one side of at least one target. [0011] In some embodiments, at least one deployable sail from the one or more deployable sails is connected to at least one actuator configured to control a movement of the at least one deployable sail. In some embodiments, at least one deployable sail from the one or more deployable sails is foldable. In some embodiments, the foldable sail can be partially or fully folded. [0012] In some embodiments, the system further comprises an electrical grounding system, that during operation electrically connects at least one grounding location in each sail to the ground. In some embodiments, the at least one grounding location is determined to optimize the evacuation of surface charging from a surface of the at least one deployable sail. In some embodiments, the system further comprising a plurality of grounding locations on at least one of the one or more deployable sails. [0013] In some embodiments, the system further comprising one or more sail charging systems for electrically charging at least one of the one or more deployable sails. In some 3 embodiments, the at least one sail is charged with the same polarization as the charged particles. [0014] In some embodiments, the area of the one or more sails when deployed, is at least one orders of magnitude larger than the total area of all exits of the flow of charged particles from the one or more charged particle dispensing units. In some embodiments, the one or more sails include a foldable material. In some embodiments, the one or more sails include a plurality of rigid slats horizontally or vertically mounted together to create a foldable structure. [0015] In some embodiments, the sail’s material comprises at least one surface layer configured to evacuate electrostatic charge from the surface of the sail. In some embodiments, the sail comprises a multilayered structure comprising at least one first layer comprising a dielectric material and at least one second layer comprising a conductive material. In some embodiments, the foldable material is a fabric comprising conductive elements threaded into the fabric. [0016] In some embodiments, at least one of the one or more deployable sails is perforated with one or more perforations. In some embodiments, at least some of the one or more perforations are covered by controllable covers, having a first uncovered state, a second, partially covered state and a third, covered state, and wherein the controllable covers are controllable to switch between a first, second and third states. [0017] In some embodiments, the system further comprises at least one first sail and at least one second sail, wherein the at least one first sail differs from the at least one second sail by at least one property. In some embodiments, the at least one property is selected from, an area of the sail, a shape of the sail, a grounding location, a number of grounding locations, a material, charging evacuation ability and any combination thereof. [0018] In some embodiments, the system comprises an array of charged particle dispensing units. In some embodiments, the array is a one-dimensional array comprising two or more charged particle dispensing units. In some embodiments, the array is a two-dimensional array comprising three or more charged particle dispensing units. In some embodiments, the array is a three-dimensional array comprising four or more charged particle dispensing units. [0019] In some embodiments, the system further comprises a controller configured to control at least one of: a parameter of the sail and a parameter of the charged particle dispensing units. In some embodiments, the system further comprises one or more sensors, 4 configured to measure one or more ambient parameters, wherein the controller is configured to control the at least one of: the parameter of the sail and the parameter of the charged particle dispensing units, based on the one or more ambient parameters. [0020] Some additional aspects of the invention may be directed to a method of controlling dispensing of charged particles, comprising: activating one or more charged particle dispensing units, mounted to a portable support, wherein each of the charged particle dispensing units, comprises: a particles provision unit; a particles charging unit, for charging particles; and a gas flow provision unit for providing gas flow to the charged particles; wherein the one or more deployable sails, when at least partially deployed, are configured to modify the effect of ambient conditions on a flow of charged particle and one or more targets; and controlling at least one of a deployment area and an orientation of one or more deployable sails connected to the portable support. [0021] In some embodiments, controlling at least one of the deployment area and the orientation of the one or more sails is conducted by controlling one or more actuators connected to the one or more sails. In some embodiments, the method further comprises receiving at least one signal indicative of ambient conditions in the vicinity of the target, and wherein controlling at least one of the deployment area and the orientation of the one or more sails is conducted based on the at least one signal. In some embodiments, the at least one signal is received from one of: a wind sensor, a humidity sensor, a pressure sensor, a temperature sensor and an external database. [0022] In some embodiments, controlling at least one of the deployment area and the orientation of the one or more sails is conducted also based on a direction of the flow of charged particles and a location of the target. [0023] In some embodiments, the method further comprising controlling a charging unit to need to charge the at least one sail. In some embodiments, the charge has the same polarity as the charged particles.

BRIEF DESCRIPTION OF THE DRAWINGS [0024] The subject matter regarded as the invention is particularly pointed out and distinctly claimed in the concluding portion of the specification. The invention, however, both as to organization and method of operation, together with objects, features, and advantages thereof, may best be understood by reference to the following detailed description when read with the accompanying drawings in which: id="p-25" id="p-25" id="p-25" id="p-25"

[0025] Fig. 1A is an illustration of a charged particles dispensing system according to some embodiments of the invention; [0026] Fig. 1B is an illustration of another charged particles dispensing system according to some embodiments of the invention; [0027] Fig. 1C is an illustration of two or more charged particle dispensing units on a portable platform, according to some embodiments of the invention; [0028] Figs. 2A and 2B are illustrations of charged particle dispensing systems having two or more deployable sails according to some embodiments of the invention; [0029] Figs. 3A and 3B are illustrations of arc-like deployable sails according to some embodiments of the invention; [0030] Fig. 3C includes illustrations of a deployable sail comprising slats in a blocked and unblocked states, according to some embodiments of the invention; [0031] Fig. 3D, is an illustration of a cross-section in a portion of a sail having a multilayer structure according to some embodiments of the invention; [0032] Fig. 4A is an illustration of two deployable sails to be included in charged particles dispensing system according to some embodiments of the invention; [0033] Fig. 4B is an illustration of a grounding system for deployable sails to be included in charged particles dispensing system according to some embodiments of the invention; [0034] Fig. 4C is a graph showing the relative surface charging as a function of the distance from the grounding location, according to some embodiments of the invention; [0035] Figs. 5A, 5B, and 5C are illustrations of a three-dimensional model of a charged particles dispensing system according to some embodiments of the invention; [0036] Figs. 6A and 6B are illustrations of another three-dimensional model of a charged particles dispensing system according to some embodiments of the invention; [0037] Figs. 7A and 7B are illustrations of a nonlimiting example of pollination system(s) according to some embodiments of the invention; [0038] Fig. 8A is a block diagram, depicting a system for dispensing charged particles according to some embodiments of the invention; [0039] Fig. 8B is a block diagram, depicting a computing device which may be included in a system for dispensing charged particles according to some embodiments of the invention; and 6 id="p-40" id="p-40" id="p-40" id="p-40"

[0040] Fig. 9 is a flowchart of a method of dispensing charged particles according to some embodiments of the invention. [0041] It will be appreciated that for simplicity and clarity of illustration, elements shown in the figures have not necessarily been drawn to scale. For example, the dimensions of some of the elements may be exaggerated relative to other elements for clarity. Further, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements.

DETAILED DESCRIPTION OF THE PRESENT INVENTION [0042] One skilled in the art will realize the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The foregoing embodiments are therefore to be considered in all respects illustrative rather than limiting of the invention described herein. Scope of the invention is thus indicated by the appended claims, rather than by the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. [0043] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the present invention. Some features or elements described with respect to one embodiment may be combined with features or elements described with respect to other embodiments. For the sake of clarity, discussion of same or similar features or elements may not be repeated. [0044] Although embodiments of the invention are not limited in this regard, discussions utilizing terms such as, for example, "processing," "computing," "calculating," "determining," "establishing", "analyzing", "checking", or the like, may refer to operation(s) and/or process(es) of a computer, a computing platform, a computing system, or other electronic computing device, that manipulates and/or transforms data represented as physical (e.g., electronic) quantities within the computer’s registers and/or memories into other data similarly represented as physical quantities within the computer’s registers and/or memories or other information non-transitory storage medium that may store instructions to perform operations and/or processes. 7 id="p-45" id="p-45" id="p-45" id="p-45"

[0045] Although embodiments of the invention are not limited in this regard, the terms "plurality" and "a plurality" as used herein may include, for example, "multiple" or "two or more". The terms "plurality" or "a plurality" may be used throughout the specification to describe two or more components, devices, elements, units, parameters, or the like. The term "set" when used herein may include one or more items. [0046] Unless explicitly stated, the method embodiments described herein are not constrained to a particular order or sequence. Additionally, some of the described method embodiments or elements thereof can occur or be performed simultaneously, at the same point in time, or concurrently. [0047] Embodiments of the present invention disclose a method and a system for dispensing charged particles toward one or more targets, that has the capability to affect ambient effects, such as, wind, humidity, temperature, and the like, on the distribution of the charged particles. Such systems may include one or more deployable sails that are configured to modify the effect of ambient conditions on the particle and the one or more targets". [0048] As used herein, a "target" may include any body that is required to receive charged particles. The body may be made or may include conductive materials, dielectric materials and a combination thereof. The target may be a living item, such as, a tree or a plant, or may be an inanimate item, such as, a metallic body (e.g., a ship) to be cleaned by sandblast, a wall of a chemical reactor, and the like. In some embodiments, the target may be electrically grounded. In some embodiments, the target may be a charged target, for example, charged with an opposite polarity to the polarity of the charged particles, as to form electrostatic attraction between the target and the charged particles. Alternatively, the charged target may be charged with the same polarity as the charged particles, as to form electrostatic repulsion between the target and the particles. [0049] As used herein, a "deployable sail" refers to any element that can be deployed from a support and configured to modify the effect of the ambient conditions on the particle and the one or more targets. The deployable sail may include or may be made from a flexible material, such as, a fabric or a sheet deployed over one or more rigid structures or may be made from or include a rigid material, such as, one or more boards. In some embodiments, the deployable sail may be permanently deployed. In some embodiments, the deployable sail may be at least partially folded. Some nonlimiting examples for a deployable sail may 8 include, a fabric stretched on a structure, a sheet stretched on a structure, a plurality of rigid slats hinged or otherwise connected to one another, and the like. [0050] As used herein, a "rigid" material or a rigid element refers to materials or elements that have resistance to bending (e.g., having a bending yield stress higher than 10 MPa) and/or modulus of rigidity (i.e., the Shear Modulus) higher than 10 GPa. [0051] As used herein "a parameter of the sail" may include any controllable parameter that may affect the ability of the sail to modify the effect of the ambient conditions on the particle and the one or more targets". For example, a parameter of the sail may include, an area of the sail, the orientation of the sail, charging/grounding of the sail, and the like. [0052] As used herein, a "charged particles dispensing unit" refers to any unit that is capable of creating a flow of charged particles. Such a charged particles dispensing unit may include particles provision unit which may include a source of particles or may be configured to receive particles from an external source. The unit may also include a particle charging unit for charging the particles and flow provision unit for providing gas flow to the charged particles. A nonlimiting example, for charged particles dispensing unit, is given and discussed with respect to Fig. 1B. [0053] As used herein "parameter of the charged particle dispensing units" refers to any controllable parameter of the charged particle dispensing units that may affect the flow of charged particles. For example, parameters of the charged particle dispensing units may include, gas flow velocity, gas flow capacity, particle capacity, particle distribution, charging voltage, and the like. [0054] As used herein the term "to disperse", or "dispersing" as disclosed herein refers to spreading, or distributing particles. Any mechanism of dispersing the particles is under the scope of the present subject matter, for example, spraying, scattering, sprinkling, and the like, of the particles. As used herein "ambient conditions" refer to the condition in the surrounding of the target and/or the sail. Some nonlimiting examples of ambient conditions include wind, temperature, humidity, pressure, solar radiation, and the like. [0055] As used herein "ambient parameters" refer to parameters related to the ambient conditions, for example, wind velocity, wind direction, humidity level, temperature level, sun radiation level, sun radiation direction, pressure level, and the like. [0056] As used herein the term "modifying the effect of the ambient conditions on the particle and the one or more targets" may include influencing the effect of the ambient 9 conditions in the surrounding of the one or more targets and/or the flow of charged particles. For example, the modifying may include, directing a wind in the surrounding of the one or more targets and/or the flow of charged particles to a different direction using at least one deployable sail, at least partially blocking solar radiation using the at least one deployable sail, thus affecting the temperature, and the like. [0057] As used herein "particles" refer to any type of particulate material that can flow with a flow of gas. Particles according to embodiments of the invention may include solid particles (e.g., powder, granulated material, etc.) or liquid (e.g., aerosol). The solid material may be from: a natural origin (e.g., sand), vegetal origin (e.g., pollen), or artificial origin (e.g., polymeric particle). The aerosol may include any aqueous or oil-based solutions, for example, pesticide solutions for disinfecting plants/trees, dyes for coloring, acidic solutions for cleaning metallic bodies, and the like. The particles’ major diameter can vary significantly, from substantially 0.0001 micrometers to substantially 10,000 micrometers. For example, less than substantially 0.001, 0.01, 0.1, 0.5, 1.0 micrometers. In another example, less than substantially 2, 5, 10, 15, 20, 30, 40, 50, 60, 70, 80, 90, 100, 150, 250, 500, 1,000, 10,000, 100,000, 500,000 micrometers. [0058] In one nonlimiting example, the particles may include particles that are desired to be more efficiently, and more effectively, attracted to plants such as a pollen grain, a droplet of liquid fertilizer, for example sprayed droplets of materials, and the like. In another nonlimiting example, the particles may include particles that are desired to be more efficiently, and more effectively, repelled from the plant such as ,dust, a pest insect, a herbicide liquid droplet or powder particle that is to be repelled from an agricultural crop, and the like. [0059] In some embodiments, the particles may be "natural electrically charged particles" which are to particles that have natural electrical charge characteristics, without any artificial intervention. In some embodiments, "manipulated electrically charged particles" are particles whose electrical charge has been manipulated, according to embodiments described herein. [0060] As used herein "particles" the term "electrical circuit" as disclosed herein refers to a closed loop path for transmitting electrical current from a power source through at least one target and back to the power source. In some embodiments, the electrical circuit includes in addition a medium in which the at least one soil. The medium is also in mechanical and electrical contact with the at least one target. It should be noted that even though the electrical circuit includes components of the target, at least one plant and optionally the aforementioned medium, the at least one target and the medium are not part of the present subject matter. The present subject matter includes the components of the target that are for manipulating the electrical potential of the at least one target. These components will be described in detail hereinafter. [0061] According to some embodiments, manipulating the target electrical potential is changing the electrical potential of the at least one target, and more specifically changing the intensity, or level, of the target electrical potential, or changing the polarity of the target electrical potential, or both changing the intensity and polarity of the target electrical potential. According to another embodiment, the term "manipulating" refers to controlling the target electrical potential of the at least one target, namely deliberately changing the target electrical potential of the at least one target to a desired intensity, or frequency, or polarity, or any combination of desired intensity, frequency and polarity, and optionally keeping them for a desired duration of time. According to yet another embodiment, the term "manipulating" refers to monitoring the target electrical potential of the at least one target, namely registering the plant electrical potential of the at least one plant at certain points in time, or during a certain period of time. According to a further embodiment, the term "manipulating" refers to using closed loop control techniques. According to yet a further embodiment, the term "manipulating" refers to using closed loop control techniques comprising feedback and feed-forward signals. According to still another embodiment, the term "manipulating" refers specifically to "manipulating a target electrochemical potential of at least one target". [0062] Reference is now made to Fig. 1A which is an illustration of a charged particles dispensing system according to some embodiments of the invention. A charged particles dispensing system 100 may include a portable support 110, two or more charged particle dispensing units 120 mounted to portable support 110, and one or more deployable sails 1connected to portable support 110. In some embodiments, system 100 may further include at least one power supply 200 for providing power to at least some of the components of system 100. [0063] In some embodiments, portable support 110 may include a portable platform 1and at least one structure 115 (e.g., a frame) for supporting two or more charged particles 11 dispensing unit 120 and/or one or more deployable sails 130. Portable platform 112 may be a driving unit that may comprise also one or more engines and a gear system (not illustrated). Alternatively, portable platform 112 may be a tow-behind cart or any other towable platform configured to be pulled by a vehicle, such as, a tractor, a track, or a car. [0064] At least one structure 115 may be made from a rigid material (e.g., a metal alloy) and may be configured to carry the weight of at least one deployable sail 130 and/or two or more charged particle dispensing units 120. In some embodiments, at least one structure 1may be foldable, to fully or partially fold at least one deployable sail 130. Some nonlimiting examples for structure 115 are illustrated and discussed with respect to Figs. 4 to 6. In some embodiments, system 100 may include a grounding unit 140, for grounding at least one deployable sail 130 as discussed in detail with respect to Figs. 4B and 4C. [0065] In some embodiments, portable support 110 may include support grounding unit 114, for grounding at least portable platform 112, structure 115 and other components carried by portable support 110 as illustrated and discussed with respect to Fig. 1C. [0066] In some embodiments, each one of charged particle dispensing units 120 may include particles provision unit 122, particles charging unit, for charging particles 124 and particles provision unit 126 for providing gas flow to the charged particles . In some embodiments, the particles may be provided to particles provision unit 122 from an external unit. Alternatively, charged particles dispensing unit 120 may include a source of particles (e.g., a container), not illustrated. [0067] In the nonlimiting example illustrated in Fig. 1A, gas flow provision unit 126 may include a fan and another nonlimiting example, illustrated in Fig. 1C gas flow provision unit 126 may include a pressurized gas tank. The particles may be provided with the kinetic energy prior to or after being charged with the required electrostatic charge. In some embodiments, each one of charged particles dispensing unit 120 may further include particles charging unit 124 for electrostatic charging at least some of the particles. In the nonlimiting example illustrated in Fig. 1A, particles charging unit 124 may include an electrode (e.g., a wire-like electrode or a circular electrode) powered by a power source, as illustrated in Fig. 1C. [0068] In some embodiments, particles provision unit 122 may include a source of particles, and one or more pipes or conduits for providing the particles to particles charging unit 124. In some embodiments, at least a portion of the pipes or conduits may be made from a 12 material capable of charging the particles during traveling in the portion, using triboelectricity properties. In such case, particles charging unit 124 is integrated into particles provision unit 122. In a first nonlimiting example, for negatively charging the particles the portion of the pipe may include, nylon (e.g., polyamides), glass, aluminum, short fabric fibers attached to the inner surface of the portion of the pipe, and the like. In a second nonlimiting example, for positively charging the particles the portion of the pipe may include, Polytetrafluoroethylene (Teflon), Polyvinyl chloride (PVC), polyethylene (PE), polyurethane (PO) and the like. In some embodiments, when the particles are charged using the triboelectricity phenomena, power supply 200 may provide power to one or more sails 130, 130A, 130B and 130D (e.g., to the actuators controlling parameters of the sails). [0069] In some embodiments, two or more charged particle dispensing units directs the flow of particles towards one or more targets 10 and 10R. In some embodiments, at least one target 10 form the one or more targets 10 is a charged target configured to attract the charged particles, while target 10R is a charged target configured to retract/repeal the charged particles. In the nonlimiting example of Fig. 1A (and 1B) one or more targets 10 are either charged by a single power source 40 (illustrated in Fig. 1A) and therefore connected to the same electrical circuit, or may each be charged individually (as illustrated in Fig. 1B). In some embodiments, not all targets 10 may be charged. In some embodiments, a first group of targets 10 may be charged with a positive polarity and a second group of targets 10 may be charged with a negative polarity. Therefore, if the particles in flow 50 are charged with a negative polarity, the will be attract to the first group and repels from the second group. [0070] In a nonlimiting example, a first group of trees/plants to be disinfected by a negatively charged aerosol may be positively charged and the second group of trees/plants that need to avoid the disinfection may be negatively charged. [0071] In some embodiments, one or more deployable sails 130 when at least partially deployed, are configured to modify the effect of the ambient conditions on the particle and the one or more targets". In some embodiments, the ambient conditions may be selected from, wind, temperature, humidity, pressure, and the like. For example, one or more deployable sails 130 may at least partially block or may direct a wind blowing in the vicinity of system 100 and/or target 10. Some nonlimiting examples for the ability of one or more deployable sails 130 to modify the effect of the wind blowing in the vicinity of system 100 13 and/or target 10 are given in Figs. 2 to 4. In another example, at least one deployable sail 130 may at least partially block the direct solar radiation from the sun modifying the effect of the temperature in the vicinity of target 10. As it should be understood by the one skilled in the art, the  sails structure shown in Fig. 1B is given as an example only, and any combination of sails 130A, 130B and 130C are within the scope of the invention. [0072] Reference is now made to Fig. 1B which is an illustration of a charged particles dispensing system according to some embodiments of the invention. System 100 of Fig. 1B may include substantially the same components and elements as system 100 of Fig. 1A. In Fig. 1B one or more charged particle dispensing units 120 may be located above one or more targets 120, during operation. In such case, at least one sail 130B and/or 130C may be located on at least one side of at least one target 10, therefore one or more sails 130B/130C are configured to be deployed, such that a surface of at least one of the one or more sails is substantially parallel to the direction of the flow of charged particles 50. Additionally or alternatively, at least one sail 130A may be located above at least one target 10, therefore one or more sails 130A are configured to be deployed, such that a surface of at least one of the one or more sails is substantially perpendicular to the direction of the flow of charged particles 50. [0073] Reference is now made to Fig. 1C which is a nonlimiting example of two or more charged particle dispensing units on a portable platform, according to some embodiments of the invention. In some embodiments, system 100 may include particle container 1 and a particle provision unit 122 which may feed particles to two or more charged particle dispensing units 120. In the nonlimiting example, of Fig. 1B particle provision unit 122 may be in fluid communication with an air supply 3 (e.g., a gas/air pressurized tank) that may be configured to feed compressed gas (e.g., air, N2, CO2, etc.) to feeder 2a accommodating the particles. In a nonlimiting example, the particles may gravitationally move from container to feeder 2a and to doser 2b, and mixer 4. Feeder 2a may be provided with a stirrer (not shown) assisting for uniformly filling an internal space of the feeder, preventing the particles from aggregation and their adhesion to internal walls of the feeder 2a. The particles may be moved by compressed air or by venturi effect via the mixer 4. [0074] In some embodiments, the gas- particles mixture may be fed to distributer 5 which is configured for distributing the aforesaid air- particles mixture over particle exit 128 via pipes 6. In some embodiments, the particles may be electrostatically charged by at least one 14 alternative such as charging in container 1, by corona discharge by electrode 124 (e.g., a wire (as illustrated) or a circular electrode), and/or by a triboelectricity effect based on friction. The particles may be provided from particles provision unit 122 to exit 128. [0075] A flow of charged particles 50 may be directed towards a target. Numeral 200 refers to an autonomous power supply for providing power to particle charging unit 124. In a nonlimiting example, the electric circuitry is energized via a circuit breaker 14, a converter 15, high voltage distribution unit 16, high voltage safety unit 19, and conduction system 17. Mast 135 is configured for mounting an array of dispensing units 120 and sensing units of meteorological variables and spatial parameters 21 and 22, respectively. Numeral 11 refers to a data bus between sensors 21 and 22 and data processing unit 101. [0076] In some embodiments, system 100 may include an array of charged particle dispensing units. For example, system 100 may include a one-dimensional array comprising two or more charged particle dispensing units, as illustrated in Figs. 1B, 2A and 2B. In another example, system 100 may include a two-dimensional array comprising three or more charged particle dispensing units, as illustrated in Figs. 5A-5C. In yet another example, system 100 may include a three-dimensional array comprising four or more charged particle dispensing units, as illustrated in Figs. 6A and 6B. [0077] Reference is now made to Figs. 2A and 2B which are top-view illustrations of charged particle dispensing systems having two or more deployable sails according to some embodiments of the invention. In some embodiments, system 100 may include two or more deployable sails, for example, two deployable sails 130A and 130B illustrated as thick black lines in Fig. 2A, and three deployable sails 130A, 130B, and 130C illustrated as thick black lines in Fig. 2B. As shown in Figs. 2A and 2B, wind blowing in the direction of target may be blocked and/or diverted by deployable sails 130A, 130B and/or 130C. The wind may reach deployable sails 130A, 130B and/or 130C at any attack angle, to be blocked and diverted from target 10, thereby minimizing the effect of the wind on flow of charged particles 50. [0078] In some embodiments, one or more charged particle dispensing units 120 may be integrated in the one or more deployable sails 130, as shown in Fig. 2A. For example, dedicated perforation 128 (marked with dashed lines) may be made in deployable sails 130A and 130B, such that, at least nozzle 126 may extend from a surface of sail 130B towards target 10. Additional nonlimiting examples for such an arrangement are given and discussed with respect to Figs. 6A and 6B. [0079] In some embodiments, one or more charged particle dispensing units 120 are located between the two or more sails, as illustrated in Fig. 2B. In such arrangement, units 120 may be mounted to structures 115 holding sails 130 as illustrated in Figs. 5A-5C. [0080] In some embodiments, at least one deployable sail may be configured to pivotally move with respect to the target and/or wind direction, around for example, a mast or pivot 135. In some embodiments, at least some of dispensing units 120 may also be mounted on mast/pivot 135. In some embodiments, structures 115 holding sails 130 may be pivotally or rigidly connected to mast/pivot 135. In some embodiments, mast/pivot 135 may be a vertical mast or a horizontal pivot, as illustrated for example, in Figs. 5A-5B. [0081] In some embodiments, in all arrangements at least one nozzle 126 is located between the one or more deployable sails 130, 130A, 130B or 130C and target 10, such that at any time the sail does not disturb flow of charged particle 50 to reach target 10. In some embodiments, one or more sails 130 are configured to be deployed, such that a surface of each the one or more sails 130 is substantially perpendicular to the direction of flow 50 of charged particles, as illustrated in Fig. 2A. In some embodiments, one or more sails 130 are configured to be deployed, such that a surface of at least one of one or more sails 130 is substantially parallel to the direction of the flow of charged particles, as illustrated. In such case, during operation the one or more charged particle dispensing units are located above the target, and the one or more sails are located on at least one side of the target, not illustrated. [0082] Reference is now made to Figs. 3A and 3B which are top-view illustrations of curved sails-system 131, according to some embodiments of the invention. In some embodiments, two curved deployable sails 130A and 130B are pivotally connected via mast 135, as illustrated in Fig. 3A. In some embodiments, three curved deployable sails 130A, 130B, and 130C may be pivotally connected by two masts 135. [0083] In some embodiments, at least one sail from the one or more deployable sails is connected to at least one actuator configured to control a movement or orientation of the at least one deployable sail, illustrated and discussed with respect to Fig. 8A. For example, the deployable sails, illustrated in Figs. 2 and 3, pivotally connected via mast/pivot 135 may pivotally rotate one with respect to the other and thus, change the curvature of the curved 16 sails system 131 . In some embodiments, the deployable sails may be manually rotated or may be automatically rotate, using one or more actuators 137A-137M controlled by a controller 101, illustrated and discussed with respect to in Figs. 4A and 8A. [0084] In yet another example, at least one deployable sail from the one or more deployable sails is foldable, for example, as shown and discussed with respect to Fig. 5C. In some embodiments, the folding may be conducted manually or may be conducted automatically using one or more actuators 132A-132M controlled by a controller 101, illustrated and discussed with respect to in Fig. 8A. In some embodiments, the foldable sail can be partially or fully folded. [0085] In some embodiments, deployable sails 130, 130A, 130B or 130C may include a foldable material, for example, a sheet or a fabric. Some nonlimiting materials for sheets/or fabrics may include polyester fibers, polypropylene, polyethylene, acrylic fibers/sheets, and the like. [0086] In some embodiments, deployable sails 130, 130A, 130B or 130C may include a foldable structure, such as a plurality of rigid slats horizontally or vertically mounted (e.g., hinged, connected, etc.) together to create a foldable structure. A nonlimiting example of such a sail is illustrated in Fig. 4C in two configurations, blocked and unblocked. Sails 130A and/130B may include plurality of vertical rigid slats 139 connected together to a movable support 116 and configured to move between a blocked state, a partially blocked state and an unblocked state. In the nonlimiting example of Fig. 3C, in the clocked state, rigid slats 139 fully overlap with their neighboring slats such that the wind cannot pass from one side of sails 130A and/or 130B to the other. In the partially blocked state, rigid slats 139 partially overlap with their neighboring slats. In the unblocked state rigid slats 139 do not overlap with their neighboring slats allowing most of the wind pass from one side of the sails to the other. In some embodiments, the shifting from one state to the other may be done by an additional actuator actuating movable support 116. [0087] In some embodiments, the slats may be made from a multilayer structure having a first dielectric layer (e.g., made from a polymer) and a second conductive layer (e.g., a metallic layer). [0088] In some embodiments, deployable sails 130, 130A, 130B or 130C may include at least one surface layer configured to evacuate electrostatic charge from the surface of the sail. For example, conductive pattern may be printed on the sail’s fabric or the slats. In yet 17 another example, when the sail includes a foldable material, the material may have a multilayered structure comprising at least one first layer comprising a dialectic material and at least one second layer comprising a conductive material. In some embodiments, the foldable material is a fabric comprising conductive elements threaded into the fabric. In yet another example, the slats may be made from a multilayer structure having a first dielectric layer (e.g., made from a polymer) and a second conductive layer (e.g., a metallic layer). It should be appreciated by those skilled in the art that additional layers may be included in the multilayer structure. [0089] A multilayered structure for the sails material (either the fabric or the slates) is illustrated in Fig. 3D, which shows a cross-section in a portion of sail 130 that includes at least two layers, a first dielectric layer 136 and a second conductive layer 137. In some embodiments, the multilayered structure may include additional layers, such as, another conductive layer on the other side of the dielectric layer 136. In some embodiments, dielectric layer 136 may include one or more polymers, natural fibers (e.g., cotton), natural materials (e.g., wood) and any combination thereof. In some embodiments, conductive layer 137 may cover at least a portion of dielectric layer 136. For example, conductive layer 1may be a conductive pattern comprising a net of conductive strips, an array of conductive parallel strips, and the like. In some embodiments, conductive layer 137 may include a metallic alloys, such as, an aluminum alloy, copper alloy and the like. [0090] In some embodiments, the area of the one or more sails when deployed, is at least one order of magnitude larger than the total area of all the nozzles of the one or more charged particle dispensing units. Therefore, the sails may provide the required shielding from ambient conditions, such as, wind. [0091] Reference is now made to Fig. 4A which is an illustration of two deployable sails to be included in charged particle dispensing system according to some embodiments of the invention. In some embodiments, at least one of the one or more deployable sails 130A or 130B is perforated with one or more perforations 132. Perforations 132 may be added in order to add stability to the sail, particularly under strong wind, which require that at least a portion of the wind will allow to pass from one surface to the other. The location of perforations 132 may be determined such that the portions of the wind will not or may minimally disturb charges particle flow 50 from reaching target 10. 18 id="p-92" id="p-92" id="p-92" id="p-92"

[0092] In some embodiments, at least some of one or more perforations 132 are covered by a controllable cover/wind guide 134. In some embodiments, covers 134 may have a first uncovered state a, second, partially covered state, and a third, covered state, and wherein the controllable covers are controllable to switch between a first, second and third states . In some embodiments, switching between the three states may be done by controlling actuator 137 against spring 136. In some embodiments when acting as wind guides, actuator 137 may be controlled to rotate covers 134 at a specific angle with respect to the surface of the sail, thus directing the wind at a specific direction. [0093] Reference is now made to Fig. 4B which is an illustration of a grounding system for deployable sails 130A, 130B, 130C, and 130D to be included in charged particles dispensing system according to some embodiments of the invention. In some embodiments, system 1may include a grounding system 140 that during operation electrically connects at least one grounding location 145 in each sail to the ground, for example, using a grounding wheel 142. Grounding wheel 142 may be in contact with the ground at all times during the operation and/or movement of system 100. Grounding system 140 may further include at least one grounding line 141 which is a galvanic line electrically connected to the ground via grounding wheel 142. In some embodiments, in addition to having at least one grounding location 145, at least one of the sails may include one or more grounding straps 148, which may be attached (e.g., printed/glued) to the sail and configured to evacuate the charge to grounding line 141. In some embodiments, a plurality of grounding straps 148 printed/glued to the sail may form a grounding pattern 149. [0094] In some embodiments, grounding location 145 may be connected to grounding line 141 and/or one or more grounding straps 148 via conducting lines 143. [0095] In some embodiments, at least some of deployable sails 130A, 130B, 130C, and 130D may include a conductive layer or conductive elements embedded in the material (e.g., the fabric of the sail) as discussed above. These layers/elements may provide equilibrium conductive lines/paths on the surface of the sail. [0096] In some embodiments, at least one grounding location 145 and/or the location of at least one grounding strap 148 is determined to optimize the evacuation of surface charging from a surface of the at least one deployable sail 130. Optimizing the grounding locations may include determining the effective grounding distance the surface charge on each sail needs to travel until being evacuated from the sail to the ground. The effective grounding 19 distance D is the a distance from a specific grounding location at which the relative charging is lower than a predetermined threshold value from the steady-state charging on the sail. D may be determined at a distance from the grounding location at which the relative charging is lower than (e.g., by 10%, 20%, 40%, etc.) the steady-state charging on the sail. Such a calculation is demonstrated in the graph of Fig. 4C. In some embodiments, the optimization process may include adding a plurality of grounding locations 145 at each sail 130A, 130B, 130C, and 130D, as illustrated. In such case the distance between two neighboring grounding locations may be 2D. When grounding straps 148 are used, the distance between two neighboring grounding straps 148 may also be 2D. This design may ensure an effective evacuation of the charge from the surface of the sails. [0097] In some embodiments, the electrical circuit of the sails and the grounding unit mat include, all the conducting elements that are electrically connected to each other, such as, grounding wheel 142, grounding line 141, all the grounding locations 145, conducting lines 134 connecting grounding locations 145 to grounding line 141 or to grounding straps 148,grounding straps 148, the sail material and any electrical components, such as, resistors, capacitors, conductors, and the like that may allow effective evacuation of charge from the surface of the sails. [0098] In some embodiments, system 100 may include one or more sail charging systems, not illustrated, for electrically charging at least one of the one or more deployable sails. For example, the at least one sail (e.g., sail 130A, 130B, 130C, and/or 130D) may be charged with the same polarization as the charged particles, therefore, further pushing the particles away from the sail toward target 10. In some embodiments, charging systems may include, a power source (e.g., power supply 200), charging points, charging lines, charging pattern and the like which may be similar to grounding locations 145, grounding straps 148 and the like. [0099] In some embodiments, grounding unit 140 may be replaced by a set of resistors that are located at locations between or on the sails and are configured to control the surface charging of the sails and to avoid, uncontrolled electric discharging (e.g., arcs) that may harm dispensing units 120 and/or sails 130. [00100] In some embodiments, system 100 having two or more sails ( e.g., sail 130A, 130B, 130C, and/or 130D illustrated in Figs. 2-4) may include at least one first sail (e.g., sail 130A) and at least one second sail (e.g., sail 130B), wherein the at least one first sail differs from the at least one second sail by at least one property. In some embodiments, the at least one property may be selected from, an area of the sail, a shape of the sail, a grounding location, a number of grounding locations, a material, charging evacuation ability, and the like. [00101] Reference is now made to Figs. 5A, 5B, and 5C which are illustrations of a three-dimensional model of a charged particles dispensing system according to some embodiments of the invention. In the nonlimiting example of Figs. 5A, 5B and 5C, system 100 include a two-dimensional array of 9 charged particle dispensing units 120 and deployable and foldable sails 130 mounted on structures 115. Structures 115 are configured to be folded by folding system 118, thus folding the entire system 100, as illustrated in Fig. 5C. In some embodiments, portable support 110 may carry all the required components for activating charged particle dispensing units 120 (e.g., as discussed with respect to Fig. 1B) and controlling deployable and foldable sails 130. For example, portable support 110 may carry particles’ container, one or more power supplies, a pressurized gas tank, grounding/charging unit, controller/computing device 101 and the like. [00102] Reference is now made to Figs. 6A and 6B which are illustrations of another three-dimensional model of a charged particles dispensing system according to some embodiments of the invention. In the nonlimiting example of Figs. 6A and 6B, system 1include a three-dimensional array of 15 charged particle dispensing units 120 and deployable sails 130 mounted on structures 115. Each structure 115 may be connected to at least one mast 135 to allow pivoting at least some of deployable sails 130 around masts 135. In the nonlimiting example, of Figs. 6A and 6B charged particle dispensing units 120 are integrated into deployable sails 130. Therefore, deployable sails 130 may include perforations 128 for charged particle dispensing units 120. [00103] Reference is now made to Figs. 7A and 7B which are illustrations of a nonlimiting example of pollination system(s) or disinfecting system according to some embodiments of the invention. In the nonlimiting examples of Figs. 7A, a single system 100 (Fig. 7A) or two systems 100 (Figs. 7B) may be used for the pollination of trees or plants or for disinfecting trees or plants. Therefore, the particles may be pollen or pesticide aerosol and target 10 is a tree or a plant, which can be charged, or not. Systems 100 in Figs. 7A and 7B may be any system 100 according to any one of the embodiments disclosed herein above. In the nonlimiting example, of Figs. 7A and 7B tree 10 is charged, for example, in proximity to the 21 first branching point from the ground. In the nonlimiting example, of Fig. 7B, tree 10 is charged at two charging points. In some embodiments, only some of the trees may be charged and some not, for example, when only some of the trees need to be pollen. [00104] Reference is now made to Fig. 8A which is a block diagram, depicting a system for dispensing charged particles according to some embodiments of the invention. The block diagram shows the controllable components of system 100. In some embodiments, system 100 may include a controller 101 configured to control at least one of: a parameter of the sail and a parameter of the charged particle dispensing units. Controller 101 is widely discussed with respect to Fig. 8B, wherein below. System 100 may include a plurality of charged particle dispensing units 120A to 120N, wherein N is an integer, and controller 1may control the initiation/stop of the dispensing of the particles, the capacity of the flow (e.g., by controlling particles supply unit 122), the amount of power provided to particles charging unit 124, , the capacity of the particles and the like. [00105] In some embodiments, system 100 may include one or more actuators 137A to 137M, wherein M is an integer. Actuators 137A to 137M may be assembled on at least one sail 130, 130A, 130B, 130C, 130D etc. and may control at least one of, the deployment or folding of the sail, the orientation of the sail and the like. In some embodiments, at least one actuator 137 may control the opening, closure or the angle of at least one cover/wind guide 134 as discussed with respect to Fig. 4A. [00106] In some embodiments, system 100 may include one or more sensors, for example, sensors 21 or 22 illustrated in Fig. 1B. The sensors may be configured to measure one or more ambient parameters, and controller 101 may be configured to control the at least one of: the parameter of the sail and the parameter of the charged particle dispensing units, based on the one or more ambient parameters. In some embodiments, the sensors may be at least one of, a wind sensor 160, a temperature sensor 170, a pressure senso180, a a humidity sensor 190 and the like. [00107] In some embodiments, system 100 may include at least one power supply 200 for providing electricity to any one of the components disclosed herein above. In some embodiments, controller 101 may control the provision of electrical power to any one of the discussed components based on signals received from at least one of sensors 160-190. [00108] Reference is now made to Fig. 8B, which is a block diagram depicting a computing device/controller, which may be included within an embodiment of a system for 22 dispensing of charged particles, according to some embodiments. Computing device/controller 101 may include a processor 102 that may be, for example, a central processing unit (CPU) processor, a chip or any suitable computing or computational device, an operating system 103, a memory 104, executable code 105, a storage system 106, input devices 107 and output devices 108. Processor 102 (or one or more controllers or processors, possibly across multiple units or devices) may be configured to carry out methods described herein, and/or to execute or act as the various modules, units, etc. More than one computing device 1 may be included in, and one or more computing devices 101 may act as the components of, a system according to embodiments of the invention. [00109] Operating system 103 may be or may include any code segment (e.g., one similar to executable code 105 described herein) designed and/or configured to perform tasks involving coordination, scheduling, arbitration, supervising, controlling or otherwise managing operation of computing device 101, for example, scheduling execution of software programs or tasks or enabling software programs or other modules or units to communicate. Operating system 3 may be a commercial operating system. It will be noted that an operating system 3 may be an optional component, e.g., in some embodiments, a system may include a computing device that does not require or include an operating system 103. [00110] Memory 104 may be or may include, for example, a Random Access Memory (RAM), a read only memory (ROM), a Dynamic RAM (DRAM), a Synchronous DRAM (SD-RAM), a double data rate (DDR) memory chip, a Flash memory, a volatile memory, a non-volatile memory, a cache memory, a buffer, a short term memory unit, a long term memory unit, or other suitable memory units or storage units. Memory 104 may be or may include a plurality of possibly different memory units. Memory 104 may be a computer or processor non-transitory readable medium, or a computer non-transitory storage medium, e.g., a RAM. In one embodiment, a non-transitory storage medium such as memory 4, a hard disk drive, another storage device, etc. may store instructions or code which when executed by a processor may cause the processor to carry out methods as described herein. [00111] Executable code 105 may be any executable code, e.g., an application, a program, a process, task or script. Executable code 105 may be executed by processor 102 possibly under control of operating system 103. For example, executable code 105 may be an application that may control the dispensing of charged particles as further described herein. 23 Although, for the sake of clarity, a single item of executable code 105 is shown in Fig. 8B, a system according to some embodiments of the invention may include a plurality of executable code segments similar to executable code 105 that may be loaded into memory and cause processor 102 to carry out methods described herein. [00112] Storage system 106 may be or may include, for example, a flash memory as known in the art, a memory that is internal to, or embedded in, a micro controller or chip as known in the art, a hard disk drive, a CD-Recordable (CD-R) drive, a Blu-ray disk (BD), a universal serial bus (USB) device or other suitable removable and/or fixed storage unit. Data related to ambient conditions, type of targets, types of particles, etc., may be stored in storage system 106 and may be loaded from storage system 106 into memory 104 where it may be processed by processor or controller 102. In some embodiments, some of the components shown in Fig. 8B may be omitted. For example, memory 104 may be a non-volatile memory having the storage capacity of storage system 106. Accordingly, although shown as a separate component, storage system 106 may be embedded or included in memory 104. [00113] Input devices 107 may be or may include any suitable input devices, components or systems, e.g., a detachable keyboard or keypad, a mouse and the like. Output devices 1may include one or more (possibly detachable) displays or monitors, speakers and/or any other suitable output devices. Any applicable input/output (I/O) devices may be connected to Computing device/controller 101 as shown by blocks 107 and 108. For example, a wired or wireless network interface card (NIC), a universal serial bus (USB) device or external hard drive may be included in input devices 107 and/or output devices 108. It will be recognized that any suitable number of input devices 107 and output device 108 may be operatively connected to Computing device/controller 101 as shown by blocks 107 and 108. [00114] A system according to some embodiments of the invention may include components such as, but not limited to, a plurality of central processing units (CPU) or any other suitable multi-purpose or specific processors or controllers (e.g., similar to element 102), a plurality of input units, a plurality of output units, a plurality of memory units, and a plurality of storage unit. [00115] Reference is now made to Fig. 9 which is a flowchart of a method of controlling dispensing of charged particles according to some embodiments of the invention. The method of Fig. 9 may be conducted by system 100 and executed by controller 101, or any other suitable processor. 24 id="p-116" id="p-116" id="p-116" id="p-116"

[00116] In step 910, one or more charged particle dispensing units may be activated. In some embodiments, controller 101 may control power supply unit 200 to provide power to one or more charged particle dispensing units 120 in order to provide an air/gas flow and to charge the particles in order to form charge particles flow 50. [00117] In step 920, at least one of a deployment area and an orientation of one or more deployable sails may be controlled. In some embodiments, controller 101 may control one or more actuators 137A-137M to do at least one of: deploy one or more deployable sails 130, 130A-130D, change the orientation (e.g., rotate) of one or more deployable sails 130, 130A-130D, partially deploy one or more deployable sails 130, 130A-130D and the like. For example, controller 101 may control one more actuators 137A-137M to fully deploy folded deployable sails 130 or to fully fold deployable sails 130 as illustrated in Figs. 5A, 5B and 5C. In some embodiments, controller 101 may control more actuators 137A-137M to partially deploy folded deployable sails 130, for example, such that only some sails 1are deployed, or that the sails are ½ deployed. In such case, a different deployment area may be provided. [00118] In another example, controller 101 may control one or more actuators 137A-137M to rotate deployable sails 130 around mast/pivot 135 and/or to control the angle of deployable sails 130 with respect to each other, as illustrated in Figs. 6A and 6B. In such a case, the controller may direct dispensing units 120 mounted to sails 130 in various directions toward target 10. [00119] In some embodiments, controller 101 may receive at least one signal indicative of one or more wind parameters and/or an ambient condition in the vicinity of the target, and control at least one of the deployment area and/or the orientation of the one or more sails is conducted based on the at least one signal. For example, the signal may be received from wind sensor 160, humidity sensor 190, pressure sensor 180, temperature sensor 170 and an external database, for example, storage system 106. [00120] In some embodiments, controller 101 may receive a direction of the flow 50 of charged particles and/or a location of target 10, for example, from sensors associated with dispensing units 120, position and proximity sensors (e.g., sensor 21 and 22) on system 1and/or from storage system 106. In some embodiments, controller 101 may control at least one of the deployment area and the orientation of the one or more sails based on the direction of the flow 50 of charged particles and/or the location of target 10. id="p-121" id="p-121" id="p-121" id="p-121"

[00121] In some embodiments, controller 101 may control a charging unit to charge the at least one sail, by providing electrical potential from power supply 200. In some embodiments, the charge has the same polarity as the charged particles. [00122] Unless explicitly stated, the method embodiments described herein are not constrained to a particular order or sequence. Furthermore, all formulas described herein are intended as examples only and other or different formulas may be used. Additionally, some of the described method embodiments or elements thereof may occur or be performed at the same point in time. [00123] While certain features of the invention have been illustrated and described herein, many modifications, substitutions, changes, and equivalents may occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention. [00124] Various embodiments have been presented. Each of these embodiments may of course include features from other embodiments presented, and embodiments not specifically described may include various features described herein.

Claims (41)

1.CLAIMS 1. A charged particles dispensing system, comprising: a portable support; two or more charged particle dispensing units, mounted to the portable support; and one or more deployable sails connected to the portable support, wherein each charged particles dispensing unit, comprises: a particles provision unit; a particles charging unit, for charging particles; and a gas flow provision unit for providing gas flow to the charged particles; wherein the one or more deployable sails, when at least partially deployed, are configured to modify the effect of ambient conditions on a flow of charged particle and one or more targets”.

2. The system of claim 1 wherein two or more charged particle dispensing units directs the flow of particles towards the one or more targets.

3. The system of claim 2, wherein at least one target form the one or more targets is a charged target.

4. The system of any one of claims 1 to 3, comprising two or more deployable sails.

5. The system of claim 4, wherein the one or more charged particle dispensing units are mounted between the two or more sails.

6. The system of any one of claims 1-5, wherein the one or more charged particle dispensing units are integrated in the one or more deployable sails.

7. The system of any one of claims 1 to 6, wherein an exit for the flow of charged particles is located between the one or more deployable sails and one or more targets.

8. The system of any one of claims 1 to 7, wherein the one or more sails are configured to be deployed, such that a surface of at least one of the one or more sails is substantially parallel to the direction of the flow of charged particles.

9. The system of claim 7 wherein during operation the one or more charged particle dispensing units are located above one or more targets. 27

10. The system of claim 9, further comprising, at least one sail located on at least one side of at least one target.

11. The system of any one of claims 1 to 10, wherein at least one deployable sail from the one or more deployable sails is connected to at least one actuator configured to control a movement of the at least one deployable sail.

12. The system of any one of claims 1 to 11, wherein at least one deployable sail from the one or more deployable sails is foldable.

13. The system of claim 12, wherein the foldable sail can be partially or fully folded.

14. The system of any one of claims 1 to 13, further comprising an electrical grounding system, that during operation electrically connects at least one grounding location in each sail to the ground.

15. The system of claim 14, wherein the at least one grounding location is determined to optimize the evacuation of surface charging from a surface of the at least one deployable sail.

16. The system of any one of claims 14 to 15, comprising a plurality of grounding locations on at least one of the one or more deployable sails.

17. The system of any one of claims 1 to 13, further comprising one or more sail charging systems for electrically charging at least one of the one or more deployable sails.

18. The system of claim 17, wherein the at least one sail is charged with the same polarization as the charged particles.

19. The system of any one of claims 1 to 18, wherein the area of the one or more sails when deployed, is at least one orders of magnitude larger than the total area of all exits of the flow of charged particles from the one or more charged particle dispensing units.

20. The system of any one of claims 1 to 19, wherein the one or more sails include a foldable material.

21. The system of any one of claims 1 to 19, wherein the one or more sails include a plurality of rigid slats horizontally or vertically hinged together to create a foldable structure. 28

22. The system of any one of claims 1 to 21, wherein the sail’s material comprises at least one surface layer configured to evacuate electrostatic charge from the surface of the sail.

23. The system of claim 22, wherein the sail comprises a multilayered structure comprising at least one first layer comprising a dielectric material and at least one second layer comprising a conductive material.

24. The system of claim 20, wherein the foldable material is a fabric comprising conductive elements threaded into the fabric.

25. The system of any one of claims 1 to 24, wherein at least one of the one or more deployable sails is perforated with one or more perforations.

26. The system of claim 25 wherein at least some of the one or more perforations are covered by controllable covers, having a first uncovered state, a second, partially covered state and a third, covered state, and wherein the controllable covers are controllable to switch between a first, second and third states.

27. The system of any one of claims 1 to 26, comprising at least one first sail and at least one second sail, wherein the at least one first sail differs from the at least one second sail by at least one property.

28. The system of claim 27, wherein the at least one property is selected from, an area of the sail, a shape of the sail, a grounding location, a number of grounding locations, a material, charging evacuation ability and any combination thereof.

29. The system of any one of claims 1 to 28, comprising an array of charged particle dispensing units.

30. The system of claim 29, wherein the array is a one-dimensional array comprising two or more charged particle dispensing units.

31. The system of claim 29, wherein the array is a two-dimensional array comprising three or more charged particle dispensing units.

32. The system of claim 29, wherein the array is a three-dimensional array comprising four or more charged particle dispensing units.

33. The system of any one of claims 1 to 32, further comprising a controller configured to control at least one of: a parameter of the sail and a parameter of the charged particle dispensing units. 29

34. The system of claim 33, further comprising one or more sensors, configured to measure one or more ambient parameters, wherein the controller is configured to control the at least one of: the parameter of the sail and the parameter of the charged particle dispensing units, based on the one or more ambient parameters.

35. A method of controlling dispensing of charged particles, comprising: activating one or more charged particle dispensing units, mounted to a portable support, wherein each of the charged particle dispensing units, comprises: a particles provision unit; a particles charging unit, for charging particles; and a gas flow provision unit for providing gas flow to the charged particles; wherein the one or more deployable sails, when at least partially deployed, are configured to modify the effect of ambient conditions on a flow of charged particle and one or more targets”; and controlling at least one of a deployment area and an orientation of one or more deployable sails connected to the portable support.

36. The method of claim 35, wherein controlling at least one of the deployment area and the orientation of the one or more sails is conducted by controlling one or more actuators connected to the one or more sails.

37. The method of any one of claims 35 and 36, further comprising: receiving at least one signal indicative of ambient conditions in the vicinity of the target, and wherein controlling at least one of the deployment area and the orientation of the one or more sails is conducted based on the at least one signal.

38. The method of claim 37, wherein the at least one signal is received from one of: a wind sensor, a humidity sensor, a pressure sensor, a temperature sensor and an external database.

39. The method of any one of claims 35 to 38, wherein controlling at least one of the deployment area and the orientation of the one or more sails is conducted also based on a direction of the flow of charged particles and a location of the target.

40. The method of any one of claims 35 to 39, further comprising controlling a charging unit to need to charge the at least one sail. 30

41. The method of claim 40, wherein the charge has the same polarity as the charged particles.