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首页> 外文会议>International symposium on photoelectronic detection and imaging;ISPDI 2011 >Progress of NUV and FUV MCP-based photon-counting imaging detectors
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Progress of NUV and FUV MCP-based photon-counting imaging detectors

机译：基于NUV和FUV MCP的光子计数成像探测器的进展

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In the World Space Observatory-Ultraviolet (WSO-UV) mission, the Long Slit Spectrograph (LSS) instrument will provide low resolution spectra in the range 102-320nm. Both the NUV (160-320nm) and the FUV (102-170nm) channels of LSS use microchannel plates (MCP) working in photon-counting modes as detectors. In this paper, the progress and parameters of NUV and FUV photon-counting imaging detectors were described. For the NUV detector, we developed the detector based on a sealed MCP-image intensifier which comprises input window, photocathode, MCP stack, Ge-layer and its ceramic substrate. To maximize the quantum efficiency, we adopted a Caesium Telluride (Cs_2Te) photocathode, which was deposited on input window and mounted close to the MCP. For the FUV detector, because of the lower cut-off wavelength, there are no suitable window materials in this band and the open-faced design should be used to meet the requirements of the detection. Therefore, a Caesium Iodide (Csl) photocathode deposited on the input surface of the MCP was used to optimize detector efficiency. By using an existing wedge and strip anode (WSA), the imaging performance of the NUV and FUV detectors was tested respectively. Experimental results show that the quantum efficiency of Cs_2Te is 12.1% (at 230nm), the spatial resolution of NUV and FUV detectors is better than 110μm, the dark count rate of NUV and FUV detectors is about 10.5- and 2.3-counts/s*cm~2 respectively.
机译：在世界太空天文台-紫外线（WSO-UV）任务中，长缝光谱仪（LSS）仪器将提供102-320nm范围内的低分辨率光谱。 LSS的NUV（160-320nm）和FUV（102-170nm）通道均使用以光子计数模式工作的微通道板（MCP）作为检测器。本文介绍了NUV和FUV光子计数成像探测器的进展和参数。对于NUV探测器，我们开发了一种基于密封MCP图像增强器的探测器，该MCP图像增强器包括输入窗口，光电阴极，MCP叠层，Ge层及其陶瓷基板。为了最大化量子效率，我们采用了碲化铯（Cs_2Te）光电阴极，该阴极沉积在输入窗口上并安装在靠近MCP的位置。对于FUV检测器，由于截止波长较低，因此在该波段中没有合适的窗口材料，应使用开放式设计来满足检测要求。因此，沉积在MCP输入表面上的碘化铯（Csl）光电阴极可用于优化检测器效率。通过使用现有的楔形和带状阳极（WSA），分别测试了NUV和FUV检测器的成像性能。实验结果表明，Cs_2Te的量子效率为12.1％（在230nm处），NUV和FUV检测器的空间分辨率优于110μm，NUV和FUV检测器的暗计数率分别为10.5和2.3-counts / s *。厘米〜2

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