One-dimensional parallax-free position-sensitive detector for diffraction measurements based on a home-made thin THGEM.
One-dimensional parallax-free position-sensitive detector for diffraction measurements based on a home-made thin THGEM.
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DOI：
10.1107/s160057751801086x
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发表时间：
2019-01
影响因子：
2.5
通讯作者：
Shi Chen;Hongbang Liu;Qian Liu;Yang-heng Zheng;Binglong Wang;Wenqian Huang;Yang Dong;Yu Rong;Xinda Jiao;Y. Guan;Jing Wang;Min Li;Jizhou Liu;Mengmeng Zhang
中科院分区：
文献类型：
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作者：
Shi Chen;Hongbang Liu;Qian Liu;Yang-heng Zheng;Binglong Wang;Wenqian Huang;Yang Dong;Yu Rong;Xinda Jiao;Y. Guan;Jing Wang;Min Li;Jizhou Liu;Mengmeng Zhang
在北京同步辐射装置（BSRF）上研制了一台基于厚度较薄的厚气体电子倍增器（THGEM）的大型无杂散气体衍射仪。采用厚度为200 µm的较薄THGEM，可将其成形为曲线以消除松弛误差影响。检测器设计为具有48°的开角，位于距离粉末样品20 cm处。前端电路板采用128通道直流模式，用于8 keV、占空比为0.2ns/100 ns的BSRF光束线。分别测试了两种粉末样品TiO 2和SnO 2。角分辨率为0.148 ± 0.081°的测量光谱与粉末衍射文件的数据一致。将较薄THGEM的气体增益与电子电路动态范围相结合，可以获得约107的非常宽的动态范围。
A large parallax-free gas diffraction meter based on a thinner-THGEM (thick gaseous electron multiplier) has been developed at the Beijing Synchrotron Radiation Facility (BSRF). A thinner-THGEM of thickness 200 µm is adopted, which can be shaped into a curve to eliminate parallax-error effects. The detector is designed to have a 48° open angle positioned 20 cm from the powder samples. A front-end electronics board with 128 channels direct-current mode was adapted for the 8 keV BSRF beamline with 0.2 ns/100 ns stable duty cycle. Two powder samples, TiO2 and SnO2, were tested separately. The measured spectra with an angular resolution of 0.148 ± 0.081° are consistent with the data from the powder diffraction file. Combining the gas gain of the thinner-THGEM with the electronic circuit dynamic range, a very broad dynamic range of about 107 could be obtained.