GAS-DISCHARGE DEVICE BASED ON HOLLOW CATHODE FOR GENERATION OF POWERFUL HF-PULSES Russian patent published in 2020 - IPC H01J17/04 H01J17/22 

FIELD: physics; chemistry.

SUBSTANCE: invention relates to electronic high-frequency equipment, and more specifically to gas-discharge devices, in particular uncontrolled dischargers intended for generation in high-frequency plasma. Gas-discharge device includes an insulator which fixes an electrode system formed by a hollow cathode, which is turned with an open cavity towards an anode isolated from it and closing this cavity, as well as functional unit for maintaining working gas pressure (UMP). Anode and cathode are separated by screening electrodes (SE), which can be both under potentials of cathode and anode, and under floating potential of plasma or under potentials, intermediate cathode and anode, with gap of 1–5 mm between SE, and pressure maintenance unit is built-in with heated gas source (GS) from material, which provides reversible decomposition-reduction reaction, with extraction of working gas, having molar mass more than that of tritium. Particularly important features are as follows: as a source of gas (GS) in UMP there used is a mixture of composition CaO:CaCO₃ with content of CaO of not less than 5 %, except calcite CaCO₃ in UMP is added an additive of magnesite MgCO₃ or another salt with lower decomposition temperature, which allows to reduce gas source operating temperature, heater in UMP is made of nichrome without insulating coating, wherein heater is pre-sintered with GS, forming with it a single element - gas generator (GG), into the volume of the device during filling hydrogen or deuterium is added at pressure of 0.1-1 Torr, the insulator is removed from gap between SE at the distance exceeding two sizes of the gap.

EFFECT: technical result is increase in output power and service life.

6 cl, 5 dwg