The FUV detector for the cosmic origins spectrograph on the Hubble Space Telescope
The FUV detector for the cosmic origins spectrograph on the Hubble Space Telescope
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DOI：
10.1016/s0168-9002(01)01921-0
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发表时间：
2002-01-21
影响因子：
1.4
通讯作者：
Buzasi, D
中科院分区：
文献类型：
--
作者：
Vallerga, J;Zaninovich, J;Buzasi, D
宇宙起源光谱仪（COS）是一台高通量光谱仪，将在2003年哈勃空间望远镜（HST）的最后一次服务使命中安装。COS将是HST上有史以来最灵敏的紫外摄谱仪，并将调查星系间介质的电离和重子含量以及宇宙大尺度结构的起源等基本问题。COS的驱动设计目标是在两个带通通道中使用反射非常少的光学器件和具有高量子效率的检测器，在> 20，000的中等光谱分辨率下最大化吞吐量：FUV（1150-1775埃）和NUV COS FUV检测器，一种无窗微通道板（MCP）检测器，由两段组成，每段85 mm x 10 mm，首尾相连，两段之间有9 mm的间隙。该设计基于远紫外光谱探测器，具有相同的格式和前表面曲率半径，与光谱仪的光栅焦平面相匹配。然而，在MCP、光电阴极、延迟线阳极和读出电子学的设计和制造方面已经进行了改进。我们将讨论这些设计改进及其意义。(C)2002 Elsevier Science B. V.保留所有权利。
The Cosmic Origins Spectrograph (COS) is a high throughput spectrometer that will be placed on the Hubble Space Telescope (HST) during the last servicing mission in the year 2003. COS will be the most sensitive UV spectrograph ever flown aboard HST and will investigate such fundamental issues as the ionization and baryon content of the intergalactic medium and the origin of large-scale structure of the Universe. The driving design goal for COS is to maximize throughput at a moderate spectral resolution of > 20,000 using optics with very few reflections and detectors with high quantum efficiency in two bandpass channels: FUV (1150-1775 Angstrom) and NUV (1750-3200 Angstrom).The COS FUV detector, a windowless microchannel plate (MCP) detector, consists of two segments each 85 mm x 10 mm concatenated end to end with a 9 mm gap between them. The design is based on the Far Ultraviolet Spectroscopic Explorer detectors with identical format and front surface radius of curvature that matches the grating focal plane of the spectrograph. However, enhancements have been made in the design and fabrication of the MCPs, the photocathode, the delay line anode and the readout electronics. We discuss these design enhancements and their significance. (C) 2002 Elsevier Science B.V. All rights reserved.