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A sealed X-ray microchannel plate imager with CsI photocathode to improve quantitative precision of framing camera
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment ( IF 1.4 ) Pub Date : 2021-05-04 , DOI: 10.1016/j.nima.2021.165404
Yang Yang , Bingli Zhu , Yongsheng Gou , Zhen Chen , Xiaohong Bai , Junjun Qin , Yonglin Bai , Baiyu Liu , Weiwei Cao , Bo Wang , Peng Xu

In this paper, we propose a hermetically sealed X-ray microchannel plate imager as a more effective and stable alternative to the traditional open-structured imager. With two microstrip photocathodes of 100 nm Au and 100 nm CsI, respectively, the proposed imager has a measured exposure time of 65 ps when applied with a 200 ps width gate pulse. The static response test shows that the image intensity of the CsI microstrip photocathode is 3.4 times that of the Au microstrip photocathode when illuminated by a non-monochromatic portable X-ray source with high energy photons. The sealed imager not only enhances the sensitivity and stability of the framing camera, but also has the potential to reduce crosstalks and artifacts, thus further improves the precision of measurement in practice.



中文翻译:

具有CsI光电阴极的密封X射线微通道平板成像仪可提高取景相机的定量精度

在本文中,我们提出了一种密封的X射线微通道平板成像仪,它是传统开放式结构成像仪的一种更有效,更稳定的替代产品。利用分别为100 nm Au和100 nm CsI的两个微带光电阴极,当施加200 ps宽度的选通脉冲时,所提出的成像器的实测曝光时间为65 ps。静态响应测试表明,当用具有高能光子的非单色便携式X射线源照射时,CsI微带光电阴极的图像强度是Au微带光电阴极的图像强度的3.4倍。密封的成像器不仅提高了取景相机的灵敏度和稳定性,而且还具有减少串扰和伪影的潜力,因此在实践中进一步提高了测量精度。

更新日期:2021-05-08
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