A Microstructured Scintillator Device with High Light Extraction Efficiency

A high-light extraction and scintillator technology, which is applied in the field of nuclear radiation detection, can solve problems such as spectral distortion, affecting calibration, and changing detector response, and achieve the effect of reducing shape distortion and maintaining consistency

Active Publication Date: 2021-10-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the biggest problem with photonic crystals whose period is on the order of wavelength is that its diffraction effect leads to spectral distortion, that is, the enhanced light is wavelength-dependent. Since the detection response is wavelength-dependent, this will lead to changes in the detector response. , thus affecting the efficiency of the calibration

Method used

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  • A Microstructured Scintillator Device with High Light Extraction Efficiency
  • A Microstructured Scintillator Device with High Light Extraction Efficiency
  • A Microstructured Scintillator Device with High Light Extraction Efficiency

Examples

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Embodiment 1

[0031] A microstructured scintillator device with high light extraction efficiency, whose structure is as follows figure 1 As shown, it includes a substrate 1, a reflective layer 2 arranged on the substrate 1, a microstructure and a scintillator 3 arranged on the reflective layer 2, the microstructure is a grid 4, and the scintillator 3 is embedded in each grid and integrated with the microstructure.

[0032] The structure selected in this embodiment is as follows: a quartz glass substrate with a thickness of 0.5 mm. The silver film thickness of the reflective layer is 300nm. Grid material using SiO 2 , the refractive index is 1.46, the structural parameters are period P=10 μm, the grid line width D is 1 μm, and the grid line height is 0.5 μm. The composition of the plastic scintillator is polymethylstyrene as the matrix, p-triphenyl as the luminescent agent, and POPO as the wave shifting agent. The refractive index of plastic scintillators based on polymethyl methacrylat...

Embodiment 2

[0038] A microstructure scintillator device with high light extraction efficiency, comprising: a substrate, a reflective layer arranged on the substrate, a microstructure and a scintillator arranged on the reflective layer, the microstructure is a grid structure, and the scintillator is inlaid within each grid and integral with the microstructure. The refractive index of the grid structure is smaller than that of the scintillator, and the grid structure is transparent to the emission wavelength of the scintillator.

[0039] In this embodiment, the grid-like structure is a grid with a square period. The side length of the grid is 10 μm, the width of the grid lines is 0.5 μm, and the height is 0.5 μm. The material used is AlF 3 , the refractive index is 1.35.

[0040] The scintillator is a plastic scintillator with a refractive index of 1.5 and a height consistent with that of the microstructure. The scintillator material includes a matrix, a luminescent agent and a wave-shifti...

Embodiment 3

[0042] A microstructure scintillator device with high light extraction efficiency, comprising: a substrate, a reflective layer arranged on the substrate, a microstructure and a scintillator arranged on the reflective layer, the microstructure is a grid structure, and the scintillator is inlaid within each grid and integral with the microstructure. The refractive index of the grid structure is smaller than that of the scintillator, and the grid structure is transparent to the emission wavelength of the scintillator.

[0043] In this embodiment, the grid-like structure is a grid with a square period. The side length of the grid is 20 μm, the width of the grid lines is 0.8 μm, and the height is 1 μm. The material used is MgF 2 , the refractive index is 1.38.

[0044] The scintillator is a plastic scintillator with a refractive index of 1.5 and a height consistent with that of the microstructure. The material of the scintillator includes a matrix, a luminescent agent and a wave-s...

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Abstract

The invention relates to a microstructure scintillator device with high light extraction efficiency, comprising: a substrate, a reflective layer arranged on the substrate, a microstructure and a scintillator arranged on the reflective layer, and the microstructure is a grid structure, the scintillator is embedded in each grid and forms a whole with the microstructure. Compared with the prior art, the invention adopts the shape distortion that can reduce the spectrum, which is beneficial to keep the consistency of the spectral response of the detector.

Description

technical field [0001] The invention belongs to the field of nuclear radiation detection, and specifically relates to a microstructure scintillator device with high light extraction efficiency. The structural scintillator will significantly improve the light output of the scintillator in a radiation detector, thereby improving the sensitivity and signal of the detection system. noise ratio. Background technique [0002] The scintillation detection system is a very important radiation measurement device in high-energy physics experiments, nuclear physics experiments and nuclear medicine imaging systems, and the core functional material in the device is scintillator. Scintillators detect radiation by absorbing high-energy radiation and converting it into visible light. The light output of the scintillator is directly determined by the efficiency of the detector. The light output is jointly determined by the intrinsic light yield and the light extraction efficiency of the scin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/203
CPCG01T1/2033
Inventor 刘波程传伟张娟楠顾牡陈鸿刘金良陈亮欧阳晓平
Owner TONGJI UNIV
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