A Concept for an STJ-based Spectrograph
A Concept for an STJ-based Spectrograph
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基于 STJ 的摄谱仪的概念
DOI：
10.1046/j.1365-8711.2003.06772.x
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
P. Charles
中科院分区：
文献类型：
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作者：
M. Cropper;M. Barlow;M. Perryman;K. Horne;R. Bingham;M. Page;P. Guttridge;A. Smith;A. Peacock;D. Walker;P. Charles
我们描述了一个多阶摄谱仪的概念，适用于8米级望远镜，使用超导隧道结探测器的固有光谱分辨率来排序的光谱阶数。光谱仪工作在低阶，1-5或1-6，并提供从大气截止320 nm到红外H或K波段长波长端1800 nm或2400 nm的分辨率为R~8000的光谱覆盖范围。我们计算，光谱仪将提供大量的吞吐量和波长覆盖，以及高的时间分辨率和足够的动态范围。这一概念使用了目前可用的技术，或开发期较短的技术，将空间采样限制在两个线性阵列;但确定了一条升级途径，以提供更多的空间采样。所有其他具有挑战性的方面的概念-低温，热挡板和磁场偏置-被确定为是可行的。
We describe a multi-order spectrograph concept suitable for 8m-class telescopes, using the intrinsic spectral resolution of Superconducting Tunneling Junction detectors to sort the spectral orders. The spectrograph works at low orders, 1-5 or 1-6, and provides spectral coverage with a resolving power of R~8000 from the atmospheric cutoff at 320 nm to the long wavelength end of the infrared H or K band at 1800 nm or 2400 nm. We calculate that the spectrograph would provide substantial throughput and wavelength coverage, together with high time resolution and sufficient dynamic range. The concept uses currently available technology, or technologies with short development horizons, restricting the spatial sampling to two linear arrays; however an upgrade path to provide more spatial sampling is identified. All of the other challenging aspects of the concept - the cryogenics, thermal baffling and magnetic field biasing - are identified as being feasible.