Effect of photonic crystal prepared by different methods on the spatial resolution of scintillator-based synchrotron radiation imaging detector

CHEN Mei; YU Huaina; ZHAO Jun; WANG Liansheng; DU Guohao; XIE Honglan; WU Yanqing; TAI Renzhong

doi:10.11889/j.0253-3219.2015.hjs.38.070101

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Effect of photonic crystal prepared by different methods on the spatial resolution of scintillator-based synchrotron radiation imaging detector

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- Effect of photonic crystal prepared by different methods on the spatial resolution of scintillator-based synchrotron radiation imaging detector
  封面论文
- NUCLEAR TECHNIQUES Vol. 38, Issue 7, Article number: 070101(2015)
- 作者机构：
  
  1. 中国科学院上海应用物理研究所张江园区,上海,201204
  2. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2015.hjs.38.070101
  CLC：
- Published：10 July 2015
- 稿件说明：
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CHEN Mei, YU Huaina, ZHAO Jun, et al. Effect of photonic crystal prepared by different methods on the spatial resolution of scintillator-based synchrotron radiation imaging detector[J]. Nuclear techniques, 2015, 38(7): 070101
DOI：

CHEN Mei, YU Huaina, ZHAO Jun, et al. Effect of photonic crystal prepared by different methods on the spatial resolution of scintillator-based synchrotron radiation imaging detector[J]. Nuclear techniques, 2015, 38(7): 070101 DOI： 10.11889/j.0253-3219.2015.hjs.38.070101.

摘要

探测效率和空间分辨率是成像探测器的重要性能。采用光子晶体，可提高闪烁体的光提取效率和增加光输出，进而提高基于闪烁体的同步辐射X射线成像探测器的探测效率并缩短成像时间。探究光子晶体对于成像探测器分辨率的影响具有重要应用意义。在闪烁体上添加三种典型的光子晶体，在上海光源BL13W1线站进行探测器有无光子晶体的成像实验，对比分辨率靶成像效果以及衬度比的量化结果，得到影响分辨率的因素。结果表明，均匀有序、三角构型的光子晶体具有最佳的成像效果，对于光子晶体在成像探测器领域的应用研究具有指导意义。

Abstract

Background: Indirect Charge Coupled Device (CCD) using scintillator as a convertor of X-ray is widely used in synchrotron radiation X-ray imaging system. High detection efficiency and high spatial resolution of the detector are required to take advantages of the third generation synchrotron radiation light source. It has been proved that patterning the scintillator with photonic crystal (PhC) could increase the light output of the scintillator

thus enhancing the detection efficiency of scintillator-based detector. Purpose: In order to exploit the application of PhC in scintillator-based X-ray imaging detector

it is necessary to investigate the effect of PhC on the spatial resolution of the imaging detector. Methods: Three kinds of PhC

Polystyrene (PS)

Anodic Aluminum Oxide (AAO) and SiNx

were employed and superinduced on the Y3Al5O12:Ce scintillator basal. Imaging experiments with and without PhC were performed at the BL13W1 beamline of the Shanghai Synchrotron Radiation Facility (SSRF). The effect of PhC on the resolution was evaluated by comparing images of resolution bar taken by detector with and without PhC. Results: The homogeneity and the lattice type of the PhC

i.e.

SiNx have great impact on the spatial resolution. Conclusion: PhC with homogeneous structure is preferred to achieve better spatial resolution. Triangular lattice PhC performs better than the square lattice one in imaging detector. Abstract

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