Multichannel hard X-ray imaging detector with time gating function

Abstract

The invention discloses a hard X-ray imaging detector, which solves the problems in the prior art that the time resolution and the spatial resolution are both low and the field of view is small when detecting hard X-rays so that the actual detection requirements cannot be met. The present invention includes a sealed vacuum cavity mainly surrounded by a detector frame, a ray filter window and a fluorescent screen, a multi-channel hard X-ray detection photocathode and a micro-channel plate, and a pulsed high-voltage power supply all arranged in the vacuum cavity. ; The pulse high-voltage power supply provides working voltage for the multi-channel hard X-ray detection photocathode and the micro-channel plate, and applies voltage between the multi-channel hard X-ray detection photocathode and the micro-channel plate and between the micro-channel plate and the fluorescent screen. The invention has simple structure, scientific and reasonable design, and is convenient to use. When detecting hard X-rays, the invention can effectively improve the time resolution, optimize the spatial resolution and object space resolution, and has the function of time gating, and has a large detection field of view at the same time. .

Description

Technical field [0001] The invention relates to the fields of plasma physics and nuclear detection, in particular to a multi-channel hard X-ray imaging detector with time gating. Background technique [0002] Hard X-rays interact with matter, mainly photoelectric effect and Compton effect, and each effect produces corresponding high-energy primary electrons. These primary electrons continue to interact with the substance, causing the atoms and molecules of the substance to ionize and excite. If the ionization and excitation signal generated in a certain substance can be extracted from the substance, collected and amplified to become an electric pulse signal for analysis and recording, this substance can be used as a hard X-ray detector The detection medium. [0003] Hard X-rays can produce photoelectric effect and Compton effect in any substance, but not any substance can be used as a detection medium for hard X-rays. The ionization and excitation of secondary electrons in the s...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a multi-channel hard X-ray imaging detector with time gating to solve the time resolution and spatial The resolution is low and the detection field of view is small so that the actual detection requirements cannot be met

Images