Light guide layer of air light guide plastic flash detector and manufacturing method thereof

Abstract

The invention discloses a light guide layer of an air light guide plastic flash detector and a manufacturing method thereof. The invention relates to the field of large-area radiation detectors. According to light collection efficiency normalization factors of all points on the surface of a scintillation sheet of the detector, the characteristics of a light path of a Teflon film base material arechanged by adopting a UV photoetching technology. Different transmission and reflection ratios are formed at different positions of a Teflon film by adopting fixed photoetching time in each area of the Teflon film and overlapping the areas. After a light guide layer is used, the long-distance point light collection efficiency of the existing air light guide plastic flash detector is increased. Meanwhile, the supersaturated light collection efficiency of close-range points is reduced, and finally the light collection efficiency of all the points is consistent. According to the invention, the uniformity deviation of the detector with the area of 350 mm*150 mm is reduced to + / -15% and + / -25% from + / -80%, and meanwhile the overall detection efficiency of rays is kept unchanged; the light guidelayer is manufactured through machine photoetching; the manufacturing method is high in automation degree and good in consistency, and meets the requirement for batch production.

Description

technical field [0001] The invention relates to the field of large-area radiation detectors, in particular to a light guide layer of an air light guide plastic scintillation detector and a manufacturing method thereof. Background technique [0002] Large-area plastic scintillation detector is a new type of radiation detector developed in recent years. Its main features are high detection efficiency, fast response time (<10ns), strong output signal, easy to enlarge the detection area, strong environmental adaptability, light weight. The basic working principle of the detector is that when the plastic scintillator of the detector is subjected to ionizing radiation, its scintillator atoms or molecules are excited to produce fluorescence, which is then converted into visible light by wave shifting, and the light collection components such as light guides and reflectors are used to make large As many photons as possible are generated on the plastic flash sheet with a large ar...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the large difference in light collection efficiency of each point in the prior art, and to provide a light guide layer of an air light guide plastic scintillation detector and a manufacturing method thereof

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