SU161568A1 - - Google Patents

Description

Methods are known for regulating the supply of vaporized substances to the ionization chamber MP of its spectrometer using a damper and thermostat.

The described method differs from the known ones in that an inert gas is fed into the sealed chamber with the melt. The feed of the vaporized substance to the ionization chamber is controlled by changing the gas pressure on the substance with the help of a bellows reservoir.

The drawing shows a schematic diagram of an apparatus for carrying out the proposed method.

The device contains a sealed chamber}, an evaporator tube 2, a heater 3, a bellows chamber 4, a tube 5 supplying an inert gas to a sealed chamber, a discharge chamber 6, a cathode 7, a probe 8 collecting the ion current, a device 9 for maintaining the ion current aa the probe, the motor 10, the bias battery 11 on the probe, the resistance 12, from which the signal is generated, the ionization chamber 13.

The rate of flow of vapor from the tube B to the ionization chamber 13 is controlled by changing the level of the liquid substance in tube 2. To do this, a temperature drop is generated along the axis of the evaporator tube 3. From the bellows chamber 4, which regulates the pressure of the inert gas, the evaporated substance, gas argon, for example, is fed through the tube 5 into the sealed chamber 1 with the molten substance. The vaporized substance under the pressure of the gas above it enters the nonization chamber 6, in which the cathode 7 is heated, and the ion current is collected on the probe 8.

The offset on probe 8 is supported by battery 11.

A signal from the resistor 12 is applied to the device 9 to maintain the ion current on the probe, which turns on the engine 10, to drive it to move out of the gas shading in the bellows chamber.

Subject invention

The method of regulating the supply of vaporized em substances to the ionization chamber of the mass spectrometer using a damper and thermostat, is made because, in order to automate the supply of a substance, above the melt of a substance enclosed in a sealed chamber, an inert gas whose pressure on the molten substance is controlled by means of a bellows reservoir and a tube with a temperature difference.