Radio Frequency Neutron Tube Ion Source Beam Extraction Desktop Experiment Bench
A radio-frequency ion source and neutron tube technology, which is applied in the field of experimental devices for simulating the working state of neutron tubes, can solve problems such as short life, high density of monatomic ions, and low output of neutron tubes
Inactive Publication Date: 2018-04-27
NORTHEAST NORMAL UNIVERSITY
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Problems solved by technology
The same amount of gas is adsorbed, and the density of monoatomic ions is high; the beam flow rate of deuterium (D) and tritium (T) ions required to produce the same yield of neutrons is relatively small, and the sputtering damage to the target is very small, and the life of the target It can be significantly extended, and can solve the current problems of low output, short life and low stability of neutron tubes
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Embodiment Construction
[0016] The radio frequency neutron tube ion source beam extraction table top experiment platform of the present invention is composed of three different types of radio frequency ion source components, a beam extraction part and a vacuum environment part. In terms of structure, the upper part adopts a cylindrical axisymmetric structure, and the magnetic steel 9, the antenna (one of 1, 4, and 5) and the corresponding quartz discharge tube (one of 2, 3, and 6) are placed in a stainless steel bell. The top of the cover 12, the lead-out cylinder 13, the target 14, the high-voltage insulating support 15, the electrodes (20, 21, 26), the lighting lamp 19, the vacuum gauge 25, etc. are all placed on the vacuum flange 17 in the stainless steel bell jar, and the lower part is Square tabletop flange platform support for electronic control equipment, gas flow and vacuum monitors. The upper and lower parts constitute a compact and easy-to-use ion source beam extraction experimental device....
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The invention belongs to an experimental device for simulating the working state of a neutron tube, which is composed of three different types of radio frequency ion source components, a beam extraction part and a vacuum environment part. The plasma is generated inside the discharge tube and the beam extraction takes place inside the stainless steel bell jar. According to the experimental needs, different types of antennas are selected to be used with the discharge tube. When extracting positive ions, accelerate the extraction tube to add negative high voltage; when extracting negative ions, accelerate the extraction tube to add positive high voltage, the extracted beam includes negative ions and electrons, and the spare electrode is added in the vertical direction to the extraction direction, as the electron collection electrode. The present invention can conveniently optimize and combine various parameters, conduct beam extraction experiment of radio frequency ion source and simulation experiment of overall working state of neutron tube, or check the design size, material and cusp magnetic field design of a certain component.
Description
technical field [0001] The invention belongs to an experimental device for simulating the working state of a neutron tube, and in particular relates to a desktop experiment platform for extracting beam current of a radio frequency (RF) neutron tube ion source. Background technique [0002] Radio frequency neutron tubes are widely used in neutron photography, safety inspection system, material scanning, soil analysis, oil well logging, etc. Long-life, compact RF ion sources combined with reproducible targets increase throughput and reduce costs. Using a helical or ribbon antenna over an insulating discharge vessel, electromagnetic energy is coupled into the gas, resulting in ionization, dissociation, and maintenance of the plasma. The RF ion source has the advantages of simple structure and high ratio of monatomic ions, and is one of the key components of the RF neutron tube. [0003] Due to different application fields, different types of new radio frequency neutron tubes ...
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IPC IPC(8): G09B23/20
Inventor 黄继鹏
Owner NORTHEAST NORMAL UNIVERSITY