Magnetic mirror field confining plasma sealing window and sealing method thereof

Abstract

The invention discloses a magnetic mirror field-confining plasma sealing window and a sealing method thereof. The plasma sealing window provided by the invention comprises a plasma sealing window body; a plasma channel is formed in the middle of the window body; a cathode is arranged at one end of the plasma channel and an anode is arranged at the other end of the window body; the cathode and the anode are connected with a sealing window power supply; a confining magnet is arranged outside the window body; and the plasma sealing window further comprises a magnet power supply for supplying power to the confining magnet, and a vacuum pump. According to the invention, the confining magnet is used for generating a magnetic mirror field to confine ions in the plasma sealing window; the structure of the magnetic mirror field is a magnetic field configuration with two higher sides and a lower middle part, so that plasmas in the plasma channel can be confined and only the ions and electrons which are higher than certain energy can leave the plasma channel. Therefore, the speed of the ions and the electrons in the plasma sealing window leaving from the plasma sealing window becomes slow, and the aims of increasing pressure difference of the plasma sealing window and reducing the power consumption of the plasma sealing window are achieved.

Description

technical field [0001] The invention belongs to the field of nuclear technology and application, and in particular relates to a plasma sealing window confined by a magnetic mirror field and a sealing method thereof. Background technique [0002] When the accelerator system is running, the entire system needs to be kept in a vacuum state. When the beam generated by the accelerator system is in use, it is necessary to extract the ion beam into the atmosphere in some cases, for example, non-vacuum electron beam welding, clean nuclear energy driven by the accelerator, etc., some require To do sample experiments in the atmosphere, it is necessary to effectively isolate the accelerator system from the atmosphere. The vacuum window is a component used to isolate the accelerator system from the atmospheric environment, and is set at the end of the accelerator system. Traditional vacuum windows generally use metal films. Vacuum windows made of metal films cannot be used in strong cu...

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Problems solved by technology

But the current plasma sealing window has the following problems: 1) The aperture of the plasma sealing window is too small, the diameter is less than 5mm, which limits the beam current generated by the accelerator system; 2) The power consumption of the plasma sealing window is relatively high

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