CN201418200Y - Double-beam rosette radiation accelerator - Google Patents
Double-beam rosette radiation accelerator Download PDFInfo
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- CN201418200Y CN201418200Y CN2009200444647U CN200920044464U CN201418200Y CN 201418200 Y CN201418200 Y CN 201418200Y CN 2009200444647 U CN2009200444647 U CN 2009200444647U CN 200920044464 U CN200920044464 U CN 200920044464U CN 201418200 Y CN201418200 Y CN 201418200Y
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Abstract
双束蔷薇花形辐照加速器，由加速腔、高频功率源、电子枪、聚焦透镜、偏转磁铁、包括扫描系统的传输系统、控制系统、真空系统、束流诊断系统、冷却水系统组成，加速腔垂直于地面，高频功率源输出的电磁波至加速腔，使加速腔得到的电场径向分量平行于地面，电子束的轨道平面也平行于地面；加速腔分布在内外圆筒之间，偏转磁铁分布加速腔的外圆筒外，电子束在经过加速腔时均经过加速腔的内圆筒的中心，加速腔外设置两个电子枪，每个电子枪发射的电子束射入加速腔，从加速腔出来经一个偏转磁铁组返回加速腔，来回经四－五个偏转磁铁组后输出，偏转磁铁组采用193至199度的偏转磁铁，电子束路径呈现双束蔷薇花形。
The double-beam rosette radiation accelerator consists of an acceleration chamber, a high-frequency power source, an electron gun, a focusing lens, a deflection magnet, a transmission system including a scanning system, a control system, a vacuum system, a beam diagnosis system, and a cooling water system. Vertical to the ground, the electromagnetic wave output by the high-frequency power source reaches the accelerating cavity, so that the radial component of the electric field obtained by the accelerating cavity is parallel to the ground, and the orbital plane of the electron beam is also parallel to the ground; the accelerating cavity is distributed between the inner and outer cylinders, and the deflection magnet Outside the outer cylinder of the distributed acceleration chamber, the electron beam passes through the center of the inner cylinder of the acceleration chamber when passing through the acceleration chamber. Two electron guns are arranged outside the acceleration chamber, and the electron beam emitted by each electron gun enters the acceleration chamber. It comes out and returns to the acceleration cavity through a deflection magnet group, and then outputs after passing through four to five deflection magnet groups.
Description
一、技术领域 1. Technical field
本实用新型涉及大功率高频发生器，同轴高频谐振腔、毫微秒电子束加速和偏转、高真空技术、高精度偏转磁铁、束流传输系统。本实用新型尤其涉及辐照电子加速器，具体的平面布局为双束蔷薇花形辐照加速器。The utility model relates to a high-power high-frequency generator, a coaxial high-frequency resonant cavity, nanosecond electron beam acceleration and deflection, high vacuum technology, high-precision deflection magnets, and a beam transmission system. The utility model particularly relates to an irradiation electron accelerator, and the specific plane layout is a double-beam rose flower-shaped irradiation accelerator.
二、背景技术 2. Background technology
当前食品的无害消毒、灭菌、杀虫、延长货架期、一次性医疗用品的无害消毒、医药食品包装材料的无害消毒、高分子材料交联处理、聚合、接枝或降解处理、橡胶的硫化等方面均采用电子加速器或钴60进行辐照；电子加速器的电子束辐照比钴60的辐照输出功率高、能量集中且定向，停机后不产生辐射，无废物处理，成本低等优点，唯一的缺点是穿透能力差。如果利用高能电子束打到金属靶上产生的X射线可增加辐射深度，但5MeV能量以下的电子束打靶的转换效率低，能量损失大。Harmless disinfection, sterilization, insecticide, extended shelf life of current food, harmless disinfection of disposable medical supplies, harmless disinfection of medical and food packaging materials, cross-linking treatment of polymer materials, polymerization, grafting or degradation treatment, The vulcanization of rubber is irradiated by electron accelerator or cobalt 60; the electron beam irradiation output power of electron accelerator is higher than that of cobalt 60, the energy is concentrated and directional, no radiation is generated after shutdown, no waste treatment, and low cost And other advantages, the only disadvantage is poor penetration. If the high-energy electron beam is used to hit the metal target to generate X-rays, the radiation depth can be increased, but the conversion efficiency of the electron beam with an energy below 5 MeV is low, and the energy loss is large.
三、发明内容 3. Contents of the invention
本实用新型目的是：提出一种其平面布局为双束蔷薇花形辐照加速器。与单束的加速器相比，双束的辐照深度可以增加到2.5倍以上，同时二束输出也可以分别辐照物体。The purpose of this utility model is: to propose a kind of radiation accelerator whose planar layout is a double-beam rose flower shape. Compared with the single-beam accelerator, the irradiation depth of the double-beam can be increased to more than 2.5 times, and the output of the two beams can also irradiate the object separately.
本实用新型的技术方案是：双束蔷薇花形辐照加速器，由加速腔(同轴谐振腔)、高频功率源、电子枪、聚焦透镜、偏转磁铁、传输系统(包括扫描系统)、控制系统、真空系统、束流诊断系统、冷却水系统组成，加速腔垂直于地面，高频功率源输出的电磁波至加速腔，使加速腔得到的电场径向分量平行于地面，电子束的轨道平面也平行于地面。加速腔分布在内外圆筒之间，偏转磁铁分布加速腔的外圆筒外，加速腔、电子枪及束的传输系统均接真空系统，电子束在经过加速腔时均经过加速腔的内圆筒的中心，其特征是加速腔外设置两个电子枪，每个电子枪发射的电子束射入加速腔，从加速腔出来经一个偏转磁铁组返回加速腔，来回经四-五个偏转磁铁组后输出，偏转磁铁采用193至199度的偏转磁铁组，电子束路径呈现双束蔷薇花形。The technical scheme of the utility model is: a double-beam rose flower-shaped irradiation accelerator, which consists of an accelerating cavity (coaxial resonant cavity), a high-frequency power source, an electron gun, a focusing lens, a deflection magnet, a transmission system (including a scanning system), a control system, Composed of vacuum system, beam diagnosis system and cooling water system, the acceleration cavity is perpendicular to the ground, the electromagnetic wave output by the high-frequency power source reaches the acceleration cavity, so that the radial component of the electric field obtained by the acceleration cavity is parallel to the ground, and the orbital plane of the electron beam is also parallel on the ground. The acceleration chamber is distributed between the inner and outer cylinders, the deflection magnets are distributed outside the outer cylinder of the acceleration chamber, the acceleration chamber, the electron gun and the beam transmission system are all connected to the vacuum system, and the electron beam passes through the inner cylinder of the acceleration chamber when passing through the acceleration chamber The center of the center is characterized in that two electron guns are set outside the acceleration cavity, and the electron beam emitted by each electron gun enters the acceleration cavity, and returns to the acceleration cavity through a deflection magnet group from the acceleration cavity, and then outputs after going back and forth through four to five deflection magnet groups. , The deflection magnet adopts a deflection magnet group of 193 to 199 degrees, and the electron beam path presents a double-beam rosette shape.
双束电子枪可以相邻或夹一偏角，每束电子均经过加速腔的内圆筒中心，电子束通过加速腔时经过两次加速；且经过193--199度偏转磁铁组(分布在相同圆心的外圆筒外)。The double-beam electron guns can be adjacent to each other or at a deflection angle. Each beam of electrons passes through the center of the inner cylinder of the acceleration chamber. When the electron beam passes through the acceleration chamber, it undergoes two accelerations; center of the outer cylinder).
本实用新型的有益效果是：本发明实际上提供了可联用的两台加速器。提出了一种其平面布局为双束蔷薇花形辐照加速器。具有较大输出功率的效率，与单束的加速器相比，双束的面对面辐射深度可以增加到单面辐照深度的2.5倍以上，用途极为广泛。同时二束输出也可以分别辐照物体，可以作为两台加速器使用，而且许多部件可以共用，所增成本有限。The beneficial effect of the utility model is that the present invention actually provides two accelerators that can be used in combination. An irradiation accelerator whose plane layout is a double-beam rosette shape is proposed. Compared with single-beam accelerators, the face-to-face radiation depth of double beams can be increased to more than 2.5 times that of single-side irradiation depth, which is extremely versatile. At the same time, the output of the two beams can also irradiate objects separately, and can be used as two accelerators, and many components can be shared, so the increased cost is limited.
四、附图说明 4. Description of drawings
图1是本实用新型的结构示意图，图2是本实用新型的另一结构示意图。Fig. 1 is a structural schematic diagram of the utility model, and Fig. 2 is another structural schematic diagram of the utility model.
一号电子枪1、二号电子枪2、磁聚焦透镜3、外圆金属筒4、内圆金属筒5、加速腔6、偏转磁铁组7、一号引出束8、二号引出束9、输运系统10、被辐照物体11、传输线12、旋转机械13。No. 1
五、具体实施方式 5. Specific implementation
双束蔷薇花形辐照加速器的同轴谐振腔即加速腔是用二个金属材料的圆筒，上下两端分别短路，圆筒高度等于1/2λ(加在谐振腔上的电磁波的波长)的一个同轴谐振腔来加速电子，振荡电路频率为220-100MH z，其外圆筒直径1-2m；这个尺寸的选择是电子从腔中心到偏转磁铁返回到腔中心所需要的时间正好等于一个高频周期。腔设计具有最大分路阻抗，筒内表面覆以铜层或金属镀层；腔顶有藕合环，以便高频功率的引入，从腔内引出振荡电磁波的频率和相位信号为高频振荡电源自动稳频和输出电磁波的相位匹配提供信号。加速腔即同轴谐振腔外不同方位放置二个三极电子枪，枪是由高频脉冲工作，脉冲宽度为高频周期的50°，引出电压为70kv，注入电流30-100mA。偏转磁铁共10组(对每束电子枪均采用5组进行偏转，每组偏转磁铁采用195度偏转角的偏转磁铁，也可以采用4组或6组)。磁铁进出口边界角的优化设计以便使磁铁起聚焦作用，使电子束进出发射度保持一样，磁铁的机械尺寸完全一样，不同的电子能量对应于不同的磁场强度。每个电子枪产生的电流各自通过一组偏转磁铁，每次通过高频腔电子均可获得0.833MeV的能量，这样电子从电子枪出来经偏转磁铁的返回共计通过高频腔12次，可以获得二束10MeV的电子束。束流传输系统包括四极透镜，270°消色散偏转磁铁和扫描磁铁将二电子束引向地面扫描照射工件或两个电子束直接水平上下扫描工件，扫描偏转角±20°，扫描频率可调30.2-99.8次/秒，扫描范围1米，使辐照体的剂量均匀度达到±5％。The coaxial resonant cavity of the double-beam rosette radiation accelerator, that is, the accelerating cavity, is made of two metal cylinders, the upper and lower ends are respectively short-circuited, and the height of the cylinder is equal to 1/2λ (the wavelength of the electromagnetic wave added to the resonant cavity). A coaxial resonant cavity to accelerate electrons, the frequency of the oscillation circuit is 220-100MHz, and the diameter of the outer cylinder is 1-2m; the choice of this size is that the time required for electrons to return from the center of the cavity to the deflection magnet to the center of the cavity is exactly equal to one high frequency cycle. The cavity design has the maximum shunt impedance, and the inner surface of the cylinder is covered with copper layer or metal plating; there is a coupling ring on the top of the cavity to facilitate the introduction of high-frequency power, and the frequency and phase signals of the oscillating electromagnetic waves drawn from the cavity are automatically generated by the high-frequency oscillating power supply. Frequency stabilization and phase matching of the output electromagnetic wave provide the signal. The accelerating cavity is two three-pole electron guns placed in different directions outside the coaxial resonant cavity. The guns are operated by high-frequency pulses, the pulse width is 50° of the high-frequency period, the extraction voltage is 70kv, and the injection current is 30-100mA. There are 10 groups of deflection magnets (5 groups are used to deflect each electron gun, and each group of deflection magnets uses a deflection magnet with a deflection angle of 195 degrees, or 4 groups or 6 groups). The optimal design of the entrance and exit boundary angles of the magnets allows the magnets to focus and keep the emittance of the electron beams in and out the same. The mechanical dimensions of the magnets are exactly the same, and different electron energies correspond to different magnetic field strengths. The current generated by each electron gun passes through a set of deflection magnets, and the electrons can obtain 0.833 MeV energy each time they pass through the high-frequency cavity. In this way, the electrons come out of the electron gun and return through the deflection magnet for a total of 12 times through the high-frequency cavity, and two beams can be obtained. 10MeV electron beam. Beam transmission system includes quadrupole lens, 270° dedispersion deflection magnet and scanning magnet to guide the two electron beams to the ground to scan and irradiate the workpiece or two electron beams to directly scan the workpiece horizontally up and down, the scanning deflection angle is ±20°, and the scanning frequency is adjustable 30.2-99.8 times/second, the scanning range is 1 meter, so that the dose uniformity of the irradiated body can reach ±5%.
为保证加速器内真空度优于8×10-7和电子枪区域真空度优于1×10-7，在加速腔装一个分子泵和一个机械泵，电子枪及束的传输系统均连接一个分子泵和一个机械泵构成的真空系统，如束扫向地面，可再装二个分子泵和二个机械泵；同轴谐振腔直立于地面，从而产生的径向电场平行于地面，电子束的轨道平面也平行于地面。本实用新型由上述各系统加上束流诊断系统、冷却水系统组合连接而成。In order to ensure that the vacuum in the accelerator is better than 8×10 -7 and the vacuum in the electron gun area is better than 1×10 -7 , a molecular pump and a mechanical pump are installed in the acceleration chamber, and the electron gun and the beam transmission system are connected with a molecular pump and a A vacuum system composed of a mechanical pump, if the beam sweeps to the ground, two molecular pumps and two mechanical pumps can be installed; the coaxial resonant cavity is upright on the ground, so that the radial electric field generated is parallel to the ground, and the orbital plane of the electron beam Also parallel to the ground. The utility model is formed by combining and connecting the above-mentioned systems plus a beam diagnosis system and a cooling water system.
大功率高频发生器振荡频率220-100MHz，采用四极电子管，引出电压70KeV；脉冲宽度为高频周期的50°，脉冲流强2×10至2×50mA。偏转磁铁共10组(对每束电子枪均采用5组进行偏转)。The high-power high-frequency generator has an oscillation frequency of 220-100MHz, adopts a quadrupole tube, and has an output voltage of 70KeV; the pulse width is 50° of the high-frequency period, and the pulse current intensity is 2×10 to 2×50mA. There are 10 groups of deflection magnets (5 groups are used to deflect each electron gun).
为了冷却同轴共振腔、真空四极管等部件，采用去离子冷却水、一次循环水利用泵循环、并利用不锈钢平板热交换器与二次水交换热量，水温控制由安装在交换器内二次水上的旁路阀调节。In order to cool the coaxial resonant cavity, vacuum tetrode and other components, deionized cooling water is used, the primary circulating water is circulated by the pump, and the stainless steel plate heat exchanger is used to exchange heat with the secondary water. The water temperature is controlled by the secondary water installed in the exchanger. Bypass valve adjustment on secondary water.
被辐照的物体经传输线传输至一号引出束，上下扫描辐照后，经传输线传输并转180°再经二号引出束上下扫描辐照，达到两面辐照的效果，亦可以单面两束同时辐照。The irradiated object is transmitted to the No. 1 extraction beam through the transmission line. After scanning up and down for irradiation, it is transmitted through the transmission line and turned 180°, and then scanned and irradiated by the No. 2 extraction beam up and down to achieve the effect of double-sided irradiation. beams are irradiated simultaneously.
图1、2是双束电子枪相邻或夹一偏角的两种分布结构。Figures 1 and 2 show two distribution structures where the double-beam electron guns are adjacent to each other or at an angle.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101565A1 (en) * | 2012-12-31 | 2014-07-03 | 清华大学 | Ct device and method thereof |
| CN105934066A (en) * | 2016-07-01 | 2016-09-07 | 中国工程物理研究院流体物理研究所 | Particle beam accelerator |
| US9775228B2 (en) | 2013-05-17 | 2017-09-26 | Ion Beam Applications S.A. | Electron accelerator having a coaxial cavity |
| CN110798960A (en) * | 2019-10-31 | 2020-02-14 | 广州华大生物科技有限公司 | Petal-shaped electron accelerator with continuously adjustable energy |
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| CN112439131A (en) * | 2019-08-27 | 2021-03-05 | 胡逸民 | X-ray pencil beam scanning intensity modulated therapeutic linear accelerator device |
| CN113470854A (en) * | 2021-07-12 | 2021-10-01 | 中国原子能科学研究院 | Irradiation device and method for sterilization treatment by using same |
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2009
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101565A1 (en) * | 2012-12-31 | 2014-07-03 | 清华大学 | Ct device and method thereof |
| US9655220B2 (en) | 2012-12-31 | 2017-05-16 | Tsinghua University | CT devices and methods thereof |
| US9775228B2 (en) | 2013-05-17 | 2017-09-26 | Ion Beam Applications S.A. | Electron accelerator having a coaxial cavity |
| CN105934066A (en) * | 2016-07-01 | 2016-09-07 | 中国工程物理研究院流体物理研究所 | Particle beam accelerator |
| CN105934066B (en) * | 2016-07-01 | 2018-01-30 | 中国工程物理研究院流体物理研究所 | A kind of particle beam accelerator |
| CN112439131A (en) * | 2019-08-27 | 2021-03-05 | 胡逸民 | X-ray pencil beam scanning intensity modulated therapeutic linear accelerator device |
| CN112439131B (en) * | 2019-08-27 | 2023-04-07 | 胡逸民 | X-ray pencil beam scanning intensity modulated therapeutic linear accelerator device |
| CN110798960A (en) * | 2019-10-31 | 2020-02-14 | 广州华大生物科技有限公司 | Petal-shaped electron accelerator with continuously adjustable energy |
| CN111212512A (en) * | 2020-03-06 | 2020-05-29 | 陕西利友百辉科技发展有限公司 | Accelerating device, irradiation system and high-energy electron manufacturing equipment and using method thereof |
| CN113470854A (en) * | 2021-07-12 | 2021-10-01 | 中国原子能科学研究院 | Irradiation device and method for sterilization treatment by using same |
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