Embedded glow discharge electrodes

Abstract

The invention belongs to a glow discharge electrode and particularly discloses an embedded glow discharge electrode. The embedded glow discharge electrode comprises a hollow flange, a vacuum electrical lead, an electrode tip and a shielding case; the electrode tip and the shielding case are positioned on one end of a vacuum side of the vacuum electrical lead; the electrode tip is arranged within the shielding case; one side of the shielding case sleeves the vacuum side of the vacuum electrical lead; and the other side of the shielding case is an opening. The embedded glow discharge electrode can avoid direct irradiation of plasma of deuterium and tritium, has a low water leakage risk, and guarantees the safety and reliability of a thermonuclear fusion experiment.

Description

technical field [0001] The invention belongs to a glow discharge electrode, in particular to an embedded glow discharge electrode to be applied to the wall tempering of the International Thermonuclear Fusion Experimental Reactor (ITER). Background technique [0002] Glow discharge cleaning is one of the indispensable and important means for tempering the walls of the International Thermonuclear Experimental Reactor. During the exercise, the electrode is used as the anode, and the vacuum chamber is used as the cathode to perform glow discharge, and the positive ions under the acceleration of the cathode sheath bombard the wall of the vacuum chamber to decompose the impurities and fuel particles adsorbed on the wall, and then pumped by vacuum. Air system discharge device to achieve the purpose of wall cleaning and exercise. There are two types of electrodes for glow discharge cleaning in existing fusion experimental devices: (1) fixed electrodes protruding from the wall of th...

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Problems solved by technology

Although the structure of the protruding fixed electrode is simple, it needs to occupy the effective space of the vacuum chamber, especially in the plasma discharge of the deuterium-tritium fusion reaction level, the protruding electrode makes it difficult for the electrode to withstand high-temperature plasma irradiation and neutron radiation , and produce impurities that are unfavorable to the high-temperature plasma confinement performance; (2) Although the movable electrode can extend into the vacuum chamber, the electric field distribution is relatively uniform, but due to its structural limitation, there is a high possibility of water leakage into the fusion experimental reactor vacuum chamber Risk, Safety and Reliability Difficult to Meet Fusion Test Reactor Requirements

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