The device of the excitation volume discharge in dense gases
(57) Abstract:The inventive device includes a rotating hollow dielectric cylinder with screen and metallized dielectric film. Along cylinder installed the corona electrode blade shape and the collector electrode connected to the high voltage source. 2 Il. The invention relates to the field of quantum electronics and can be used for excitation of the active medium of a gas laser with high blood pressure.A device for the excitation volume discharge in the gas laser of high pressure, in which the voltage pulses of duration 10-6with unipolar and vibrational forms from the high-voltage generator serves to discharge chamber with a solid long electrodes, where the working surface of the anode is coated with a thin layer of dielectric barrier.The disadvantage of this device is that it cannot work from a constant voltage source. Know the use for pumping electrode system electrostatic generator rotor type, including extended corona and collector electrodes, installed with the generatrix of the outer surface of toasty around its axis. When installing from the opposite side wall of the cylinder against the discharge electrode grounded plate - screen, increased runoff of charges on the dielectric substrate. In the gas gap h between the working edge of corotron and the surface of the moving dielectric is formed sustained volume discharge in atmospheric pressure, the magnitude of the current I is limited by the speed of movement of the dielectric v surface density of deposited charges and length of corotron l, since I=v l.However, the use of generators as corotron brush or plate electrodes in direct contact with the moving surface of the dielectric reduces the width of the gap h to micron sizes, hinders the development of ionization mechanisms in gases and reducing the degree of homogeneity of the charge of the substrate.The aim of the invention is to increase the capacity of the continuous volume of the gas discharge in dense environments.In Fig. 1 presents a diagram of the device; Fig.2 is a view As in Fig.1.The device consists of a high voltage source 1, the discharge electrode 2 blade type, foil electrode current collector 3 and the cylindrical shell consisting Alsatia. With metal spokes 7 and the screen 5 is a cylindrical shell mounted on the axis of rotation 8, forming the rotor. Axis 8 through the sliding contact 9 is connected to ground. To ensure rotation of the rotor axis 8 is installed on the bearings 10.The device operates as follows.When the rotor speed at the level of 2000-3000 rpm is supplied from a source 1 for one 2 high voltage and provides the ignition of the corona discharge. Pulling emitting electrons, which are dispersed in the field, gaining energy for the development of ionization processes with predominant formation of positive or negative ions depending on the gas type and capacity of the electrode 2. Ions drifting in bistrosavage field E and when we approach the substrate is accelerated in the induced field polarized dielectric. The surface charge is transported by the rotor to the electrode 3 and flows down to the ground. When the field strength level E20 kV/cm, the drift velocity of ions is comparable to thermal speed of the gas molecules and substantially exceeds the speed of the film. This leads to such a rapid charging of the capacitor substrate, the region of diffuse emission in place of the circuit volume discharge to surface the education takes the form of a thin "sheet". This form plasma of education increases the stability of the discharge volume by improving the conditions of cooling of the plasma by diffuse heat from the volume and reduce the likelihood of the development of several independent perturbations across the base of the discharge.Received sustained volume discharge in a neutral gas is Not, electronegative gases CO2, air and a mixture of CO2: N2:Not at a pressure of 103-105PA in the electrode gap of 30 mm and put power into the category of the 2.103W.The use of a moving dielectric substrate allows to obtain a continuous volumetric discharge in dense gases in the form of a thin plasma sheet, which increases the stability of the bulk phase and provides an opportunity to raise deposited power without overheating the gas by increasing the surface of the heat sink with increasing period. In addition, the proposed device does not require the introduction into the circuit of the discharge of ballast resistance, implementing an efficiency of 100%. Rotating the hollow cylinder can be used for placement of the impeller that allows you to organize pumping gas in the electrode gap for wah, contains a source of high voltage connected to the extended corona and collector electrodes and a screen installed along the hollow dielectric cylinder is made to rotate, and the corona electrode is installed along the radius of the cylinder with a clearance relative to the cylinder, characterized in that, with the aim of increasing the capacity of continuous gas discharge, the screen is made in a layer of foil deposited on the outer surface of the dielectric cylinder, the device further comprises a metallized dielectric film, fixed on the surface of the screen metallized side to him, and the corona electrode is made knife form.
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
FIELD: physics, optics.
SUBSTANCE: invention relates to laser engineering. The laser includes a gas-filled housing which is fitted with a ceramic discharge chamber with an extended high-voltage flange, a high-voltage electrode and a grounded electrode, both placed extended and placed in the discharge chamber, and at least one preionisation unit. Each preionisation unit comprises a system for generating creeping discharge, which includes an extended dielectric plate having an arched shape in the cross-section. In another version of the invention, the high-voltage electrode is placed on the inner side of the high-voltage flange and is partially transparent. The preionisation unit is placed on the back side of the partially transparent high-voltage electrode. The extended walls of the ceramic discharge chamber are preferably inclined towards the high-voltage electrode, and capacitors are inclined towards the high-voltage electrode.
EFFECT: high generation energy and power of the laser.
24 cl, 6 dwg
FIELD: power industry.
SUBSTANCE: invention relates to laser engineering. The gas laser discharge system contains the extended first and second laser electrodes, located in the laser housing, UF pre-ionizer located aside from one of laser electrodes and designed as the system of ignition of sliding discharge between extended igniting electrode and additional electrode located on the surface of the dielectric layer coating an extended metal substrate. The dielectric layer is designed as a part of direct thin-walled cylindrical tube enclosed between two planes of the tube cuts made along its length parallel to the axis. The igniting electrode is placed on the internal surface of the part of the dielectric tube along it and connected to the laser electrode, and the surface of the extended metal substrate is made concave and superposed with the part of external cylindrical surface of the dielectric layer.
EFFECT: possibility of increase of generation energy and simplification of the laser design.
4 cl, 4 dwg