Cherenkov detector and detection method by using same

Abstract

The invention discloses a cherenkov detector comprising a cherenkov radiator, a photoelectric diode, a reflecting film and a light shading layer. The cherenkov radiator is used for emitting cherenkov light; the photoelectric diode is coupled with one end of the cherenkov radiator; the reflecting film is plated on surfaces except the end surface where the cherenkov radiator is coupled with the photoelectric diode; the light shading layer is arranged outside the cherenkov radiator, the photoelectric diode and the reflecting film; and the lead wire of the photoelectric diode is led out of the light shading layer. Adopting the photoelectric diode as a readout device, the cherenkov detector can work more stably and reliably in the radiation imaging field; provided with the reflecting film, the photoelectric diode improves the light collection efficiency; due to the favorable light transmission performance of the cherenkov radiator, the photoelectric diode can detect more deeply along the incident direction of the rays, thereby improving the detection efficiency and improving the ultimate cherenkov signal output value; and the cherenkov detector is more applicable in the radiation imaging field due to the measures.

Description

technical field [0001] The invention relates to the field of radiation imaging, in particular to a Cerenkov detector and a detection method using it. Background technique [0002] A Cherenkov detector is a radiation detector that measures charged particles traveling faster than the speed of light in a medium. It consists of a radiation body that can produce the Cerenkov effect coupled with a photosensitive device. Radiator is transparent solid, liquid (distilled water is often used) or gas. It is applied to the measurement of high-energy charged particles, such as cosmic rays, high-energy accelerator particles, etc. In the application, according to different experimental purposes, different types of detectors are made to measure the speed, intensity or energy of charged particles. output control signal, etc. The Cherenkov detector has the advantages of simple structure and easy manufacturing process; its disadvantage is that the radiation intensity is too weak, and it is ...

AI Technical Summary

Problems solved by technology

The Cherenkov detector has the advantages of simple structure and easy manufacturing process; its disadvantage is that the radiation intensity is too weak, so it is necessary to use a photomultiplier tube with high sensitivity and low noise, a good light collection system, and an anti-coincidence device to eliminate the background and other measures

[0003] Cerenkov detectors are often used in high-energy physics because of the low light yield, that is, low sensitivity, and the distribution of the number of photons is inversely proportional to the wavelength of light, and rays with a velocity below a certain threshold do not produce Cerenkov Traditionally, photomultiplier tubes are generally used as the photoelectric conversion devices of Cerenkov detectors. The photomultiplier tubes are required to shield external electromagnetic interference, and compared with photodiodes used in radiation imaging, the quantum efficiency is low. , and the cost is high; these characteristics limit its application in the field of radiation imaging

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