Performance of the integral field spectrograph for the Gemini Planet Imager
Performance of the integral field spectrograph for the Gemini Planet Imager
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DOI：
10.1117/12.925790
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发表时间：
2012-09
期刊：
影响因子：
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通讯作者：
J. Chilcote;J. Larkin;J. Maire;M. Perrin;M. Fitzgerald;R. Doyon;S. Thibault;Brian Jeffrey Bauman;B. Macintosh;J. Graham;L. Saddlemyer
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作者：
J. Chilcote;J. Larkin;J. Maire;M. Perrin;M. Fitzgerald;R. Doyon;S. Thibault;Brian Jeffrey Bauman;B. Macintosh;J. Graham;L. Saddlemyer
我们介绍了双子行星成像仪（GPI）的积分场光谱仪（IFS）的实验室测试结果。GPI是双子座天文台的设施级仪器，其主要目标是直接探测年轻的类木行星。GPI IFS基于凯克OSIRIS仪器的概念，并利用红外透射透镜阵列对2.8 x 2.8弧秒的矩形视场进行采样。IFS提供1 ~ 2.5μm之间5个波段的低分辨率光谱。或者，分散元件可以替换为沃拉斯顿棱镜，以提供宽带偏振在相同的五个滤光带。IFS的建设基于加州大学洛杉矶分校，与蒙特利尔大学、Immervision和劳伦斯利弗莫尔国家实验室合作。在建造过程中，我们遇到了一个不寻常的噪声源来自夏威夷- 2rg探测器的麦克风拾音器。我们描述了这种噪声以及如何通过隔振消除它。IFS已经通过了船前审查，并于2011年底交付给加州大学圣克鲁兹分校，用于与GPI的其余子系统集成。IFS已与GPI的其余部分集成，并提供GPI日冕场的高质量光谱数据。
We present performance results, from in-lab testing, of the Integral Field Spectrograph (IFS) for the Gemini Planet Imager (GPI). GPI is a facility class instrument for the Gemini Observatory with the primary goal of directly detecting young Jovian planets. The GPI IFS is based on concepts from the OSIRIS instrument at Keck and utilizes an infrared transmissive lenslet array to sample a rectangular 2.8 x 2.8 arcsecond field of view. The IFS provides low-resolution spectra across five bands between 1 and 2.5μm. Alternatively, the dispersing element can be replaced with a Wollaston prism to provide broadband polarimetry across the same five filter bands. The IFS construction was based at the University of California, Los Angeles in collaboration with the Université de Montr eal, Immervision and Lawrence Livermore National Laboratory. During its construction, we encountered an unusual noise source from microphonic pickup by the Hawaii-2RG detector. We describe this noise and how we eliminated it through vibration isolation. The IFS has passed its preship review and was shipped to University of California, Santa Cruz at the end of 2011 for integration with the remaining sub-systems of GPI. The IFS has been integrated with the rest of GPI and is delivering high quality spectral datacubes of GPI's coronagraphic field.