Method for cleaning surface of hollow electrodes in air-tight sealing thyratron

Abstract

The invention discloses a method for cleaning the surface of hollow electrodes in an air-tight sealing thyratron. The method comprises the following steps of: firstly, connecting the air-tight sealing thyratron into a device for baking the hollow electrodes of the air-tight sealing thyratron at high temperature, a first vacuum system for vacuumizing each component in the air-tight sealing thyratron and a second vacuum system for vacuumizing the external space of the air-tight sealing thyratron, connecting the first hollow electrode and the second hollow electrode to the positive electrode and the negative electrode of a power supply respectively, starting the first vacuum system, performing high-temperature baking, starting the second vacuum system, cooling, introducing purified hydrogen for ion cleaning, and replacing the positive electrode and the negative electrode of the power supply for cleaning the other electrode. The method is convenient to operate, residual pollutants on the surface of an anode can be thoroughly removed, a thyratron exhaust system can be shared, plasma cleaning equipment does not need to be independently used, only a movable direct-current power source needs to be independently provided, and therefore plasma cleaning is achieved at low cost.

Description

technical field [0001] The invention relates to a method for cleaning the surface of a hollow electrode, in particular to a method for cleaning the surface of a hollow electrode in a hermetically sealed thyratron. Background technique [0002] The anode and grid of the hollow thyratron are subjected to electron bombardment during the working process, and the instantaneous power reaches the order of hundreds of megawatts. The materials selected are tungsten and molybdenum with high melting points and resistance to splashing. The hollow electrode processed with tungsten-molybdenum material is a refractory tungsten-molybdenum material, and its surface state cannot meet the high standard requirements after chemical treatment. The tungsten and molybdenum material is formed by powder metallurgy, and the hollow electrode is electrochemically or chemically polished to assemble and weld the surface of the electrode, especially in the groove of the electrode and the fine convex and co...

AI Technical Summary

Problems solved by technology

The hollow electrode processed with tungsten-molybdenum material is a refractory tungsten-molybdenum material, and its surface state cannot meet the high standard requirements after chemical treatment.

The tungsten and molybdenum material is formed by powder metallurgy, and the hollow electrode is electrochemically or chemically polished to assemble and weld the surface of the electrode, especially in the groove of the electrode and the fine convex and concave holes on the edge of the groove, there will be carbon-containing organic matter and attached fine metal particles, cold and high pressure for a long time It is also difficult to achieve good results for aging, which seriously affects the high-voltage stability of aging and working processes

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