Upgrade of the detector in the integral field spectrograph OSIRIS at the W. M. Keck Observatory
Upgrade of the detector in the integral field spectrograph OSIRIS at the W. M. Keck Observatory
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W. M. Keck 天文台积分场摄谱仪 OSIRIS 探测器的升级
DOI：
10.1117/12.2233100
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发表时间：
2016
影响因子：
2.1
通讯作者：
J. Weiss
中科院分区：
文献类型：
--
作者：
A. Boehle;J. Larkin;S. Adkins;T. Aliado;M. Fitzgerald;C. Johnson;J. Lyke;K. Magnone;J. Sohn;E. Wang;J. Weiss
本文介绍了积分场光谱仪OSIRIS中摄谱仪探测器的升级结果。OSIRIS是凯克1号望远镜上的近红外（1到2.5微米）积分场光谱仪。该仪器在一个连续的矩形视场上同时产生多达3000个光谱，光谱分辨率约为3800。OSIRIS与Keck自适应光学系统一起工作，以实现衍射有限的空间分辨率，并具有四个板尺度，范围从0.02到0.10弧秒。2005年首次启动时，仪器的摄谱仪部分配备了罗克韦尔夏威夷2号探测器。我们现在已经将其升级为具有更低读取噪声，更低暗电流和更高量子效率的Teledyne Hawaii-2RG （H2RG）。除了升级后的探测器，我们还将探测器头安装在线性台上，当仪器处于低温（~80 K）时，可以沿着光路精确调整探测器的位置。这减少了将探测器图像平面置于摄谱仪相机对焦和调整探测器图像平面的任何残余尖端/倾斜所需的冷却次数。我们介绍了新探测器的调试结果以及由于这次升级而提高的OSIRIS仪器的灵敏度。
We present the results of the upgrade of the spectrograph detector in the integral field spectrograph, OSIRIS. OSIRIS is a near-infrared (1 to 2.5 microns) integral field spectrograph on the Keck I telescope. This instrument produces up to 3,000 spectra simultaneously over a contiguous rectangular field of view with a spectral resolution of ~3,800. OSIRIS works with the Keck Adaptive Optics system to achieve diffraction-limited spatial resolution and has four plate scales ranging from 0.02 to 0.10 arcseconds. At first light in 2005, the spectrograph portion of the instrument was equipped with a Rockwell Hawaii-2 detector. We have now upgraded this to a Teledyne Hawaii-2RG (H2RG) with lower read noise, lower dark current, and higher quantum efficiency. In addition to the upgraded detector, we also mounted the detector head on a linear stage, allowing the position of the detector to be accurately adjusted along the optical path when the instrument is at cryogenic temperatures (~80 K). This reduced the number of cool downs required to put the detector image plane at the spectrograph camera focus and adjust any residual tip/tilt of the detector image plane. We present the results of commissioning the new detector and the improved sensitivities of the OSIRIS instrument due to this upgrade.