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Small-spot X-ray diode for strengthening pinch focusing by plasmas generated by anode foil

A plasma and anode foil technology, applied in the field of self-magnetic focusing X-ray diodes, can solve the problem of low radiation dose

Inactive Publication Date: 2016-06-01
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a small focal spot X-ray diode with plasma generated by the anode foil to enhance pinch focusing, which solves the technical problem of low radiation dose of the existing small focal spot X-ray source

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Embodiment Construction

[0016] The principle of the present invention is to use the anode foil to generate plasma to enhance focusing. In a typical "ring cathode-plate anode" electron beam diode structure, a conductive film with the same potential as the plate anode is arranged in front of the plate anode. The film is called anode foil. . During the working process of the diode, after the anode foil is bombarded by the electron beam, a plasma region is rapidly formed in the area near the anode conversion target. The bidirectional flow caused by the plasma is beneficial to the focusing and pinching of the electron beam. In addition, the spatial diffusion of the plasma improves the electromagnetic field distribution in the anode conversion target area. The above factors can effectively control the focusing state of the electron beam pinching. Under appropriate parameter conditions, the combined effects of the above factors can significantly reduce the size of the X-ray focal spot and increase the radia...

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Abstract

The invention relates to a magnetic self-focusing X-ray diode with small-spot and large-dose radiation output, in particular to a small-spot X-ray diode for strengthening pinch focusing by plasmas generated by an anode foil. The small-spot X-ray diode comprises a cathode, an anode and the anode foil, wherein a transmitting terminal of the cathode and a receiving terminal of the anode are sealed in an outer anode cylinder; the anode foil is equipotential to the anode; and the anode foil is located between the transmitting terminal of the cathode and the receiving terminal of the anode. The anode foil is arranged in front of an anode target, so that the anode foil plasmas can be generated under the action of electron beams; the electron beams enter the area and then are subjected to strong pinch in the process of interacting with the anode foil plasmas; and small-spot and large-dose radiation X-ray output is obtained.

Description

technical field [0001] The invention relates to a self-magnetic focusing X-ray diode with small focal spot and large-dose radiation output, in particular to a small focal spot X-ray diode with anode foil generating plasma to enhance pinch focusing. Background technique [0002] Small focal spot pulsed X-rays can be used in fluid mechanics experiments to see through the structure, state and evolution process of high-speed moving objects under extreme conditions. It has many important applications in national defense and civilian fields. The small focal spot X-ray source is the key parameter in the diagnostic system, and the focal spot size, radiation dose and other parameters are closely related to the imaging quality. [0003] Since the diode devices used to generate small focal spot X-ray sources usually work under high-voltage pulses of millions of volts, the electromagnetic field environment is complex, and the working state changes extremely fast (the working process las...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/02H01J35/08
CPCH01J35/02H01J35/08
Inventor 张鹏飞邱爱慈孙江胡杨来定国孙剑锋郭建明丛培天杨海亮
Owner NORTHWEST INST OF NUCLEAR TECH
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