X-ray pinch diode provided with centering structure
A diode and X-ray technology, applied in the field of X-ray pinch diodes, can solve problems such as no invention patents, no reports, etc.
Inactive Publication Date: 2012-08-22
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
[0008] There have been researches on the physical principle of the anode rod pinch diode at home and abroad, but there are no reports on the matching of the pulse power source and ensuring the stability of the focal spot position, and there are no related invention patents
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[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0031] The X-ray pinch diode with cathode and anode adjustment centering structure described in the present invention is mainly used as an X-ray flash photography device. The invention mainly guarantees the stability of the generated X-ray focal spot position from two aspects of the structure size of the diode and the collimation and centering technology. The structure of the anode rod pinch focusing diode is to use a disc-shaped graphite cathode with a hole in the middle to surround a small-diameter anode rod, and the anode rod tapers and extends beyond the cathode plane for a certain distance. The electrons emitted by the radial cathode are pinched by the beam from the magnetic field, focused downstream of the cone, and bombard the anode tip composed of heavy metals to generate bremsstrahlung X-rays, which are emitted from the anode end that is sharpe...
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The invention relates to an X-ray pinch diode provided with a centering structure, which comprises a vacuum transmission line inner cylinder, a vacuum transmission line outer cylinder, a connecting and supporting ring, a ball head, an anode bar, a cathode disc and an insulating stack, wherein the vacuum transmission line inner cylinder is a stainless steel cylinder and divided into an upstream section and a downstream section, the upstream section and the downstream section are connected through an inner cylinder transition section, an O-shaped seal ring and a fastening screw, the inner cylinder and the outer cylinder are connected only by the inner cylinder-outer cylinder connection part, the anode bar of the diode is plugged into a graphite support rod to form a cantilever support structure, and centering screws which can be used for positioning the cathode disc is arranged outside the cathode disc, and positioning screw stems which can adjust a lever through pitch adjustment are uniformly distributed at an outer end. Through centering of the cathode and the anode of the diode, the focal spots of the generated X rays are controlled to be of submillimeter-order, and the X-ray pinch diode can be used for transmission imaging of an explosion process or the interior of a high-speed moving material so as to obtain the state of the interior structure in the moving process and the image of the evolution process.
Description
technical field [0001] The invention belongs to an X-ray pinch diode with a centering structure. Background technique [0002] X-ray flash photography is similar to taking X-rays in medicine. It allows people to understand the complex internal structure of objects without dismantling them. It has been used to obtain static "frozen" images of dynamic events. But its technique is more complex and more performant: [0003] (1) The focal spot of the X-rays it produces is very small, and the diameter of the focal spot can be less than 1mm [0004] (2) It flashes extremely fast, the pulse time is very short, and the X-ray tube (X-ray tube, called anode rod pinch diode) generates X-rays for about 50ns [0005] (3) The X-ray energy it produces is very high, and the highest X-ray energy can reach 2600keV. [0006] (4) The total intensity of the X-rays it produces is very high, and the dose at 1m in front of it can reach 36mGy. [0007] Flash photography is the use of strong pulse...
Claims
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IPC IPC(8): H01J35/02H01J35/08
Inventor 杨海亮孙剑锋苏兆锋李静雅孙凤举孙江张鹏飞尹佳辉高屹梁天学
Owner NORTHWEST INST OF NUCLEAR TECH