Gas discharging type ion source for neutron pipe

A gas discharge and neutron tube technology, applied in discharge tubes, ion beam tubes, circuits, etc., can solve the problem of low atomic ion ratio, achieve the effect of increasing neutron output and prolonging working life

Inactive Publication Date: 2012-10-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of the low proportion of atomic ions in the ion beam emitted by the

Method used

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  • Gas discharging type ion source for neutron pipe

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Effect test

Embodiment 1

[0014] Such as figure 1 As shown, a gas discharge type ion source for a neutron tube, including a magnetic steel 1, a lower cathode plate 2, an anode cylinder 3, an upper cathode plate 4, a magnetic ring 5, an insulating material 6, and a Ni foam metal active sheet 7 and the extraction electrode 8. Ni foam metal active sheet 7, its thickness is 3 mm, average pore diameter = 0.23 mm, specific surface area = 5800 m 2 / m 3 . The magnetic steel 1 and the magnetic ring 5 make the magnetic field strength in the anode cylinder reach 600 gauss. The ion source is placed in a vacuum chamber, and then filled with deuterium gas in the vacuum chamber to reach 10 -3 —10 -2 Pa. When working, connect an external power supply. The anode cylinder 3, the upper cathode 4, and the lower cathode 2 (the upper and lower cathodes are connected in series) are externally connected with a pulse power supply voltage of 1800-2300 V, and a power supply frequency of 10 kHz. After the gas breaks down...

Embodiment 2

[0016] Such as figure 1 As shown, a gas discharge type ion source for neutron tubes, including, magnetic steel 1, lower cathode plate 2, anode cylinder 3, upper cathode plate 4, magnetic ring 5, insulating material 6, Fe foam metal active sheet 7 and the extraction electrode 8. Fe foam metal active sheet 7, its thickness is 3 mm, average pore diameter = 0.6 mm, specific surface area = 1500 m 2 / m 3 . The magnetic steel 1 and the magnetic ring 5 make the magnetic field strength in the anode cylinder reach 600 gauss. The ion source is placed in a vacuum chamber, and then filled with deuterium gas in the vacuum chamber to reach 10 -3 —10 -2 Pa. When working, connect an external power supply. The anode cylinder 3, the upper cathode 4, and the lower cathode 2 (the upper and lower cathodes are connected in series) are externally connected with a pulse power supply voltage of 1800-2300 V, and a power supply frequency of 10 kHz. After the gas breaks down, due to the action of...

Embodiment 3

[0018] Such as figure 1 As shown, a gas discharge ion source for a neutron tube, including a magnet 1, a lower cathode plate 2, an anode cylinder 3, an upper cathode plate 4, a magnetic ring 5, an insulating material 6, and a Co foam metal active sheet 7 and the extraction electrode 8. Co foam metal active sheet 7, its thickness is 3 mm, average pore diameter = 1.6 mm, specific surface area = 250 m 2 / m 3 . The magnetic steel 1 and the magnetic ring 5 make the magnetic field strength in the anode cylinder reach 600 gauss. The ion source is placed in a vacuum chamber, and then filled with deuterium gas in the vacuum chamber to reach 10 -3 —10 -2 Pa. When working, connect an external power supply. The anode cylinder 3, the upper cathode 4, and the lower cathode 2 (the upper and lower cathodes are connected in series) are externally connected with a pulse power supply voltage of 1800-2300 V, and a power supply frequency of 10 kHz. After the gas breaks down, due to the ac...

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Abstract

The invention provides a gas discharging type ion source for a neutron pipe, belonging to the technical field of an accelerator. The gas discharging type ion source comprises magnetic steel, a lower cathode board, an anode cylinder, an upper cathode board, a magnetic ring, a foam metal active thin board and a lead-out electrode. When the gas discharging type ion source works, the anode cylinder is externally connected with pulse power voltage, and an upper cathode and a lower cathode are connected in series and then are externally connected with the pulse power voltage. The foam metal active thin board is connected with a low-voltage power supply relative to the upper cathode; and the lead-out electrode is externally connected with the high-voltage pulse power supply relative to a grate. Deuterium molecular ions emitted from the lower cathode can be converted to be deuterium atomic ions in foam metal due to the catalytic action of the foam metal active thin board, and a ratio of a deuterium atomic ion beam to a deuterium molecular ion beam can be tested by using an cyclotronic mass spectrometer after the deuterium atomic ions are accelerated by using the lead-out electrode. With the adoption of the gas discharging type ion source provided by the invention, the hydrogen (including isotopic deuterium or tritium) atomic ion beam with a high ratio can be output from the lead-out electrode, so that if the ion source is used in the neutron pipe, the service life of the neutron pipe can be prolonged, and the neutron yield is improved.

Description

technical field [0001] The invention relates to a gas discharge ion source, in particular to a gas discharge ion source specially used for emitting monatomic hydrogen (deuterium, tritium) ion beams, and belongs to the technical field of accelerators. Background technique [0002] The neutron tube is a safe and portable neutron source. Compared with ordinary isotope neutron sources, it has better energy spectrum monochromaticity, no gamma background and can generate pulsed neutrons. It can be turned off when not in use, so it is easy to protect , Storage management and transportation are convenient. The neutron tube integrates the ion source, accelerator, target and air pressure regulation system in a closed tube, and does not need vacuum pumping equipment and gas source device during operation. Neutron tubes can be widely used in national defense engineering, industry, agriculture, and medicine, especially in the fields of military industry and safety inspection. When neut...

Claims

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Application Information

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IPC IPC(8): H01J27/04
Inventor 邹宇伍建春展长勇
Owner SICHUAN UNIV
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