RU196889U1 - CONTROLLED DISCHARGE - Google Patents

Abstract

The utility model relates to the field of pulse technology, to the formation of pulses of currents and voltages, is a controllable discharger and can be used as a switch for capacitive energy storage devices. The controlled arrester contains a cathode and anode located in a sealed dielectric casing with a window for inputting focused laser control radiation. The cathode is made of VT1-0 alloy and has through holes. A plug is integrated in the housing from the side opposite the window. The internal volume of the body is filled with gas pressure from 10Pa to 10Pa. The technical result of the utility model is to increase the service life of the arrester. 1 ill.

Description

The utility model relates to the field of pulsed technology, to the formation of current and voltage pulses, namely, to controlled dischargers for switching currents, for use as capacitive switches of capacitive energy storage.

Known controlled arrester containing installed in a sealed insulating casing opposing anode and cathode, while one of the electrodes is made in a conical shape. Patent of the Russian Federation No. 119935, IPC H01J 17/64, 08/27/2012. The disadvantage is its small service life, which is due to the selected diameter of the hole in the anode, as well as significant erosion of the top of the cone when exposed to laser studies and when working in an electric discharge.

Known controlled vacuum spark gap containing a cathode made of VNB-3 alloy, and an anode located in a sealed dielectric casing with a window for inputting focused control laser radiation, while in the anode on the axis of the spark gap a hole is made of a cylindrical-cylindrical shape, while a cylinder of larger diameter faces the cathode and has sharp edges, and the diameter of the smaller cylinder is minimally sufficient for the laser beam to pass and focus on the cathode surface. Patent of the Russian Federation No. 183129, IPC Н01Т 14/00, H01J 17/64, 09/12/2018. This technical solution was made as a prototype.

The disadvantage of the prototype is the limited service life of the arrester. The selected filling of the internal volume, as well as the selected cathode material, does not fully limit the cathode material sprayed (when the device is triggered) and its deposition on the inner surface of the window for introducing laser radiation, as well as on the surface of the electrodes and the walls of the housing, which leads to overlapping of the window atomized cathode material and breakdowns.

The objective and technical result of the utility model is to increase the service life of the arrester.

The technical result is achieved in that in a controlled arrester containing a cathode and anode located in a sealed dielectric casing with a window for inputting focused control laser radiation, the cathode is made of VT1-0 alloy and has through holes; in the case from the side opposite to the window, a plug is integrated; the internal volume of the body is filled with gas pressure from 10 ³ PA to 10 ⁶ PA.

The essence of the utility model is illustrated in the drawing, which shows a cross section of a spark gap, where:

1 - case ring;

2 - case ring;

3 - case ring;

4 - window;

5 - anode;

6 - cathode;

7 - stennel;

8 - focusing system;

9 - laser.

The controlled arrester consists of a sealed enclosure and an electrode system located in it. The housing includes housing rings 1, 2, 3 made, for example, of alumina ceramic, and a window for inputting focused optical radiation 4. An anode 5, made of refractory metal or alloy, for example, VT1-0, cathode 6, made of a refractory metal or alloy, for example, VT1-0, and a plug 7 made of metal or alloy, for example, AMts. The cathode has openings sufficient for gas to pass from the volume between the plug and the cathode into the volume between the cathode and the anode. The focusing system 8 focuses on the surface of the cathode of the laser beam 9. In this case, the internal volume is filled with gas with a pressure of 10 ³ Pa to 10 ⁶ Pa, for example, nitrogen.

The arrester operates as follows.

The pulsed optical radiation emitted by the laser, passing through the focusing system, the window of the sealed housing and the anode, is focused on the surface of the cathode, which leads to melting and evaporation of the cathode material, the formation of a conductive medium that closes the gap between the anode and cathode and causes the switching of a current pulse. Due to the filling of the housing with gas, for example, nitrogen, at a pressure of 10 ³ Pa to 10 ⁶ Pa, the atoms and ions of the eroded cathode material, unlike the prototype, are repeatedly scattered by gas molecules, which in turn leads to ion recombination and a decrease in the adhesion energy particles on the inner surface of the window. The use of a cathode made of an alloy based on VT1-0 titanium, due to its getter properties, also makes it possible to achieve a more uniform gas composition in the internal volume of the housing, which helps to stabilize the operating parameters of the spark gap. Thus, the above design features can virtually eliminate the growth of a thin metal film on the inner surface of the spark gap window, thereby increasing the life of the spark gap.

Claims (1)

A controlled arrester containing a cathode and anode located in a sealed dielectric casing with a window for inputting focused control laser radiation, characterized in that the cathode is made of VT1-0 alloy and has through holes; in the case from the side opposite to the window, a plug is integrated; the internal volume of the body is filled with gas pressure from 10 ³ PA to 10 ⁶ PA.

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