Miniature penning ion source in high magnetic field

A Penning ion source and high magnetic field technology, applied in discharge tubes, electrical components, circuits, etc., can solve the problems of difficult vacuum, small overall structure, high vacuum, etc., achieve compact structure, improve ionization efficiency, and improve motion track effect

Active Publication Date: 2016-11-09
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0006] 3. The ion source needs to work in a vacuum environment. Since the overall structure is very small, it is difficult to achieve a higher vacuum degree

Method used

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  • Miniature penning ion source in high magnetic field

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 As shown, a micro-Penning ion source provided by the present invention under a high magnetic field is installed in the electromagnet 4 of a superconducting isochronous cyclotron, and consists of a cathode 1, a first insulating member 2, an anode support 3, and an anode cylinder 5 , Hydrogen gas pipeline 7, the second insulator 9 to form. Wherein, the outgassing of the cathode 1, the first insulator 2, the second insulator 9, and the anode support 3 does not affect the vacuum degree in the ion source. Outgassing means that the material releases gas in a vacuum. The ion source needs to work in a vacuum environment. The outgassing of the material will have a very adverse effect on the ionization reaction in the ion source.

[0025] The anode cylinder 5 is a hollow metal tube, and is arranged between a pair of electromagnets 4 capa...

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Abstract

The invention belongs to the technical field of superconducting cyclotron accelerators, and particularly relates to a miniature penning ion source in a high magnetic field. The miniature penning ion source comprises a hollow anode tube arranged between a pair of electromagnets capable of generating a high magnetic field through an anode bracket. The two ends of the anode tube are provided with a pair of cathodes and the cathodes are arranged on the anode bracket through a first insulation piece and a second insulation piece. A hydrogen pipeline is arranged in the anode bracket and the hydrogen pipeline can feed the hydrogen gas into the anode tube. A high-frequency voltage can be applied on the cathodes. The length of the anode tube is about 50 mm, and the diameter of the inner cavity of the anode tube is 2-3 mm. The tube thickness of the anode tube is 0.75 mm. An extraction slit is arranged on one side of the anode tube, wherein the length and the width of the extraction slit are respectively 6-10 mm and 0.5 mm. The cathodes, the first insulation piece, the insulation piece and the air outlet of the anode bracket do not influence the vacuum degree in the ion source. During the air outlet process, gases are discharged out of materials in the vacuum. The ion source is compact in structure and can be arranged in small and narrow spaces. Meanwhile, the electric discharge of the ion source is enabled even at a very low air pressure, so that the design requirements of superconducting equal-time rotary accelerators are met.

Description

technical field [0001] The invention belongs to the technical field of superconducting cyclotrons, in particular to a miniature Penning ion source under high magnetic field Background technique [0002] A cyclotron is a device that uses a magnetic field and an electric field to make charged particles perform cyclotron motion, and is repeatedly accelerated by a high-frequency electric field during the motion. It is an important instrument in high-energy physics. Among them, the superconducting isochronous cyclotron (a superconducting cyclotron) branch) is the core equipment of the current medical proton therapy accelerator. Medical proton therapy accelerators can treat tumors with protons and heavy ion rays in the microscopic world. It is the most advanced radiation therapy technology in the world today, and only a few developed countries have mastered and applied this technology. [0003] In the superconducting isochronous cyclotron, the ion source technology is a key techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J37/08H05H7/08
CPCH01J37/08H05H7/08H05H2007/082
Inventor 贾先禄宋国芳张天爵
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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