Multi-channel large-area high-density direct-current arc plasma source

Abstract

The invention provides a multi-channel large-area high-density direct-current arc plasma source which comprises a cathode, a cathode seat, an anode and a cascade sheet unit. The cathode is fixed on the cathode seat, the cascade sheet unit is arranged between the cathode seat and the anode, and the cascade sheet unit comprises a plurality of cascade sheets which are stacked in parallel; insulating parts and vacuum sealing rubber rings are arranged between the cathode seat and the cascading sheets, between the adjacent cascading sheets and between the cascading sheets and the anode; and the cathode seat, the cascade sheets and the anode are respectively provided with seven through holes to form a discharge channel. The large-area high-density plasma beam generated by the discharge channel can be used for scientific research and industrial application of interaction of plasmas and substances, and is particularly used for irradiating large-size fusion materials or device parts. The discharge channel can be independently controlled, discharge parameters of different channels are adjusted to change plasma parameters and spatial distribution of beams, and scientific research, an industrial application and simulation irradiation experiment conditions of parts at different positions in a fusion reactor can be met.

Description

technical field [0001] The invention relates to the field of plasma physics and applied scientific research, in particular to a multi-channel large-area high-density DC arc plasma source. Background technique [0002] Facing the trend of global energy consumption, magnetic confinement nuclear fusion is regarded as an important way to solve energy problems in the future. In a magnetic confinement fusion device, the first wall interacts with the boundary plasma (PWI), where the beam density of the boundary plasma can be as high as ~10 24 m -2 the s -1 , which leads to the complex physical and chemical process of the PWI process. Due to the high cost and low efficiency of fusion devices for PWI experiments, generating plasma in the laboratory with parameters similar to the boundary plasma to irradiate wall materials is a common method for studying the PWI process. [0003] Among the linear plasma devices currently used to study the PWI process, the cascaded arc plasma sourc...

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Problems solved by technology

[0005] The purpose of the present invention is to address the fact that the existing cascaded arc plasma sources generally have a small irradiation area or only lengthen the one-dimensional cross-sectional space. The above-mentioned large-scale fusion materials or device components with complex structures cannot be uniform in two-dimensional cross-sectional space. Irradiation experiments, and the problem that a single-channel plasma source cannot produce a specific spatially distributed plasma beam according to the actual situation of the fusion reactor, a multi-channel large-area high-density DC arc plasma source is proposed, which can be used in two Large-area high-density plasma can be generated by the three-dimensional cross-section, and the beam parameters and spatial distribution can be adjusted

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