Ultrafast pulse X ray source system
An X-ray and source system technology, applied in the field of ultra-short pulse X-ray source system, can solve the problems of low stability and reliability, difficulty in forming ultra-short pulse X-ray source, high cost, etc., and achieve low cost and time reduction. , the effect of controllable duty cycle
Inactive Publication Date: 2016-03-30
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology
Due to the need for a high peak power femtosecond laser source as a light source, the cost is high, the stability and reliability are not high, and it is difficult to form an ultrashort pulse X source that can be used in the market
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[0027] see figure 1 , figure 2 , the test device provided by the present invention includes: a high-speed scanning electron optical system, an ultrashort pulse X-ray emission system;
[0028] The main principle is: in a vacuum environment, the electron gun 1 emits an electron beam, which is accelerated and focused by the electron optical system, and enters the double-plate electrode for high-speed scanning at a high-speed scanning voltage. The anode is a metal filament with a width of micron. The material can be gold and other materials with good X-ray emission ability. The electron beam bombards the gold anode to generate X-ray pulses. The time of electron bombardment to the gold anode is controlled by the scanning speed, which is usually proportional to the width of the anode and inversely proportional to the scanning speed. . Therefore, by reducing the width of the anode and increasing the scanning speed, the time for the electrons to bombard the gold anode is on the ord...
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The invention provides an ultrafast pulse X ray source system, comprising an electronic gun, an electro-optical system, a metal anode, a window and a vacuum pipe wall; the electronic gun is an emission source; the electro-optical system is arranged on the emission light path of the electronic gun; the electro-optical system comprises an electronic accelerating system, a focusing system and a high speed scanning system which are arranged successively; voltage is added between the metal anode and the focusing system so as to form an electronic field; the electronic gun, the electro-optical system and the metal anode are all arranged on the vacuum pipe wall; the window is arranged on a side wall of the vacuum pipe wall. The invention is a stable and reliable X ray pulse source system with the time resolution reaching the picosecond order; an electronic beam is scanned at a high speed under a vacuum environment, a metal fine wire is bombarded and an ultrashort pulse X ray device is generated; by using the electronic beam scanned at the high speed to bombard the metal fine wire, emission of the X ray pulse of the picosecond order is realized.
Description
technical field [0001] The invention relates to an ultrashort pulse X-ray source system; the system scans an electron beam at high speed in a vacuum environment and bombards metal filaments to generate an ultrashort pulse X-ray device. Background technique [0002] For traditional X-ray sources, by modulating the gate voltage, the pulse is difficult to reach the microsecond level. It cannot meet the ultra-fast detection needs of nanoseconds or even picoseconds. [0003] Developed countries developed the current ultra-short ps pulse X-ray source earlier, using femtosecond laser to bombard metal tips under vacuum conditions to achieve ultra-fast X-ray pulse emission on the order of picoseconds. This method is relatively mature at present, and many research institutions use this method to obtain ultrafast X-ray sources for the study of ultrafast phenomena. Due to the need for high peak power femtosecond laser light source as the light source, the cost is high, the stability a...
Claims
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Login to View More IPC IPC(8): H01J35/08H01J35/14
CPCH01J35/08H01J35/14
Inventor 汪韬田进寿尹飞辛丽伟闫欣高贵龙梁玲亮
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI