The method of initiation of the gas discharge in the gas discharge devices, cold cathode

 

(57) Abstract:

The invention relates to the field of quantum electronics, particularly to gas discharge devices, cold cathode, which are used in lasers. The initiation of the gas discharge in the gas discharge devices, cold cathode occurs when a voltage is applied to the discharge electrodes. Before applying power emitting surface of the cathode begin to irradiate electromagnetic radiation with a wavelength of 0.4 - 0.8 μm. The invention improves the performance of devices with a cold cathode, especially at low temperatures. 1 Il.

The invention relates to the field of quantum electronics, particularly to gas discharge devices, cold cathode (laser gyroscopes).

There are various ways to initiate a gas discharge in a discharge devices with a cold cathode [1-3]. All of these techniques is the application of a voltage to the electrodes.

The closest in technical essence of the present invention is a method implemented in a device that uses a powerful, highly concentrated source of ultraviolet radiation exposure on the surface of the cathode [4].

services cathode, the low operating speed of the device, through the use of a mercury lamp, a narrow temperature range of operation of the device.

For laser gyroscopes operating in a wide temperature range, the performance of the device is determined by the output time of the control voltage on the mode, and the delay time of the gas discharge after applying voltage to the electrodes, for which there is the appearance of initiating electrons in the discharge gap and the formation of electron avalanches.

The present invention is to increase the performance of gas-discharge devices of the cold cathode at low temperatures.

This task is solved by a method for initiating a gas discharge in the gas discharge devices, cold cathode, comprising applying voltage to the electrodes, thus before applying voltage to the electrodes, emitting surface of the cathode begin to irradiate electromagnetic radiation in the optical range, wherein the wavelength is chosen in the range from 0.4 to 0.8 μm.

The proposed method of initiation of the gas discharge in the gas discharge devices, cold cathode implemented thought cathode.

Before applying voltage to the electrodes of the device, the inner surface of the hollow tubular cathode 1, which is emitting through the aperture 2 begin to irradiate electromagnetic radiation in the optical range 3, the source of which is opposite the anode. The radiation source after enabling works or continuously during the time of operation of the device, or turn off after the formation of the gas discharge. This effect accelerates the emergence of initiating electrons and the formation of stable glow discharge.

When the radiation emitting surface of the cathode electromagnetic radiation in the optical range ( = 0.4 to 0.8 μm) with quantum energy exceeding the binding energy of the work function of the electrons of the cathode material, the time of occurrence of the initiating electron in the discharge gap is the minimum physically possible (t 10-8c).

When the radiation emitting surface of the cathode electromagnetic radiation with quantum energy smaller than the energy of the work function of the cathode material, the occurrence of the initiating electron occurs after some time, during which the total energy of a quantum of radiation and the electric field exceeds the energy of RA is the area from +50oC to -50oC).

When you exit the lower boundary of the optical range, i.e., when the < 0.4 µm, in particular in the UV and x-ray, the time of occurrence of the initiating electron will not decrease in comparison with the lower boundary of the optical range (t 10-8C).

When exceeding the upper limit of the optical range > 0.8 μm, in particular in the IR and microwave frequencies, the time of occurrence of the initiating electrons will be determined by the output time mode voltage on the electrodes of the device and to a greater extent by the delay time of the gas discharge. (t 10-1- 10 in the temperature range from +50oC to -50oC).

When exposed to a radiation emitting surface of the cathode, the power density of the radiation is chosen in the range from 0.2 to 10-6up to 102-103W/cm2. The lower bound is determined from the condition of the existence of the effect, and the top of the conditions when the radiation exposure does not lead to irreversible structural changes of the surface layers of the cathode.

The tests have shown that using this method of initiation of the gas discharge in the gas discharge devices, cold cathode allowed to increase the performance of the device at least 2">

Sources of information

1. Korzhavyi A. P., Cristea C. I. Physical processes in the near-cathode region of a glow discharge and the prediction of durability of cathode materials. Reviews on electronics. Ser.6.: Materials. Ch. I, II. - M.: Central research Institute of electronics, 1988/89.

2. Yuri R. D., Korzhavyi A. P., Cristea C. I. Emission properties of cold cathodes with an oxide film on the surface for a sealed gas discharge devices. Reviews on electronics. Vol 6. : Materials. - M.: Central research Institute of electronics, 1991.

3. Baiborodin Y. C. fundamentals of laser technology. - Kiev: Visa School, 1988.

4. USSR author's certificate N 503312, H 01 J 3/02, 18.01.77.

The method of initiation of the gas discharge in the gas discharge devices, cold cathode, comprising applying voltage to the electrodes, thus before applying power emitting surface of the cathode begin to irradiate electromagnetic radiation in the optical range, wherein the wavelength is chosen in the range of 0.4 - 0.8 μm.

 

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