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 .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.
FIELD: electrical engineering.
SUBSTANCE: invention relates to high-frequency hardware and can be used producing high-frequency radiation generators (HFG). The HFG built around the hollow arc-cathode incorporates a vacuum discharge chamber formed by the grounded hollow cathode with its open space facing the anode isolated from the cathode and closing the said open space, a blocking capacitor with its one plate connected in circuit via a transfer line formed by a forward conductor connecting the capacitor other plate to the load and a reverse conductor to couple the cathode with the load. To output the generated radiation, the said reverse conductor represents a conducting enclosure enveloping the cathode over its edges in contact with the former and housing the aforesaid blocking capacitor and the forward conductor. A coaxial cable with an inner conductor making a forward conductor and its sheath, making a reverse conductor, is formed by the conducting shell connected to the cable outer conductor and isolated from the inner conductor.
EFFECT: output of generated HF radiation with lower losses due to reduced inductance of power transfer line.
2 cl, 1 dwg
SUBSTANCE: control device includes a step-up voltage pulse transformer (9), a capacitive energy storage (5), a pulse hydrogen thyratron (15) and a trigger generation unit containing a thyristor (8) included in the transformer primary circuit (9), a shunting capacitor (18) connected to the thyristor control electrode (8), a saturation throttle (6) and the second shunting capacitor (7), which reduces the stress rate across the thyristor (8). To delay the voltage supply to the grid of the pulse hydrogen thyratron (15) relative to the trigger of the thyristor (8) to the thyristor (8) control electrode and a clock pulse generator (19) is connected to the grid of the hydrogen thyratron (15). A capacitive energy storage (5) can be connected to an alternating voltage circuit via a step-up voltage pulse transformer (9) and a mains single-ended rectifier (1).
EFFECT: possibility of using the device in generator schemes, both with pulse charging of the storage capacitor, and with DC charging, increasing reliability due to reducing the number of elements and operating efficiency, providing parallel operation of two thyratrons of the TDI series.
2 cl; 3 dwg
FIELD: quantum electronics, spectrometry, and plasma chemistry.
SUBSTANCE: proposed method for firing sparkless discharge in solid gases includes ignition of main charge between first and second electrodes by applying high-voltage pulse minus across first electrode and its plus, across second one, gas being pre-ionized with aid of low-energy electron beam, photons, and plasma electrons produced directly within main-discharge space; low-energy electron beam is produced by means of open barrier discharge with high-voltage pulse applied between first electrode made in the form of grid disposed on insulator surface and additional electrode disposed on opposite side of insulator; main charge is fired not earlier than ignition of open barrier discharge; the latter and main discharge are ignited within one gas-filled chamber. Device implementing proposed method has first and second electrodes forming main discharge gap, and high-voltage pulsed power supply; first electrode is made in the form of grid disposed on insulator surface whose opposite side mounts additional electrode; high-voltage pulsed power supply is connected through minus terminal to first grid electrode and through plus one, to second electrode; it functions to ignite main discharge; additional high-voltage pulsed power supply for open barrier discharge is connected through plus terminal to first grid electrode and through minus one, to additional electrode; first grid electrode, second electrode, additional electrode, and insulator are mounted in same gas-filled chamber.
EFFECT: enhanced main-charge stability due to enhanced efficiency of gas pre-ionization in main discharge gap from pre-ionization source disposed within main discharge space.
4 cl, 5 dwg
FIELD: electrical engineering, physics.
SUBSTANCE: laser incorporates elongated solid main electrodes, each furnished with, at least, one UV-preionisation device. The gas flow zone is formed by gas flow dielectric guides and the main discharge electrode working surfaces. The said preionisation devices are arranged outside the gas flow zone to enlighten the gap between the main discharge through the gap between the main discharge electrodes and the flow dielectric guides.
EFFECT: laser efficient operation under the conditions of high pulse rate.
11 cl, 3 dwg
SUBSTANCE: present invention pertains to quantum electronics, particularly to electrode systems of gaseous TE-lasers. In the electrode system of TE-laser with corona preoinisation, the inner conductors of the corona preionisation devices are only connected between themselves. The outer conductors of the corona preionisation devices are connected to the main discharge electrodes.
EFFECT: provision for effective preionisation of the discharge gap, which does not require a high voltage lead through the case to the electrodes of the preionisation device.
5 cl, 2 dwg
SUBSTANCE: laser has a gas pumping loop in which there are series-arranged discharge gap formed by two extended electrodes, diffuser, heat exchanger, cross flow fan with an impeller and an extra channel. The inlet opening of the extra channel lies on the pressure side of the fan. The distance between the electrodes is between 0.05 and 0.25 times the external diametre of the impeller. The extra channel is in form of a convergent tube with an outlet hole directed towards the impeller of the fan on the suction side of the fan.
EFFECT: design of a compact TE-type gas laser with efficient laser gas pumping, stable operation and high pulse repetition rate.
4 cl, 1 dwg
SUBSTANCE: laser includes gas-filled chamber with the main discharge electrodes installed in it, charging circuit and discharging circuit. Charging circuit includes pulse voltage source and peaking capacitors. Discharging circuit includes peaking capacitors and the main discharge electrodes, at least one corona pre-ioniser in the form of dielectric tube with inner and outer electrodes. Outer electrode of pre-ioniser covers part of surface of dielectric tube and is connected to the main discharge electrode. At that, outer electrode of corona pre-ioniser is current lead of charging circuit.
EFFECT: improving efficiency of pre-ionisation and stability of operation.
FIELD: physics, optics.
SUBSTANCE: invention relates to laser engineering. The discharge system of a high-efficiency gas laser includes, arranged in the housing of the laser, extended first and second electrodes which define a discharge area in between. On the side of one of the electrodes there is a UV preioniser, which is in the form of a system for igniting a uniform creeping discharge between the extended ignitor electrode and an additional electrode, placed on the surface of a dielectric layer which covers an extended metal substrate connected to the additional electrode. The dielectric layer is in the form of a straight thin-wall dielectric tube with a longitudinal section. The ignitor electrode and the additional electrode are placed on the outer surface of the dielectric tube along the tube, and the metal substrate is placed inside the dielectric tube such that at least part of the surface of the metal substrate is superimposed with the extended part of the inner surface of the dielectric tube. The additional electrode is connected to the metal substrate through the longitudinal section of the dielectric tube.
EFFECT: increasing generation energy and average radiation power of the gas laser and simple design of the gas laser.
5 cl, 4 dwg
SUBSTANCE: invention refers to a gas molecule and atom excitation device in gas laser pumping systems. The device represents a tray in the form of an elongated parallelepiped or cylinder having an outer casing made of an insulation material. Parallel mesh electrodes - anode and cathode - are integrated into the casing along the tray walls. The space between the electrodes represents a discharge chamber for glow burning. Between each electrode mesh and the inner face of the tray, there are chambers used as a gas flow conditioner. Gas is individually supplied into each of the chambers. One of the side walls of the gas tray is slotted to release an excited gas molecule or atom flow from the discharge chamber into a resonant chamber generating a radiation flow.
EFFECT: downsizing and reducing power of the device and maintaining energy deposition.
3 cl, 2 dwg
FIELD: physics, optics.
SUBSTANCE: invention relates to laser engineering. The discharge system of an excimer laser includes a space discharge area (4) in a laser chamber (1) between first and second electrodes (2), (3), the longitudinal axes of which are parallel to each other; each preionisation unit (5) comprises a system for generating uniform complete creeping discharge on the surface of an extended dielectric plate (6), having an arched shape in the cross-section. The arched dielectric plate (6) can be in the form of a dielectric tube.
EFFECT: enabling laser energy and power increase.
21 cl, 13 dwg