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.

 

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