A detector upgrade for OSIRIS: Doubling the sensitivity of the near-IR diffraction limited integral field spectrograph

OSIRIS 探测器升级：近红外衍射极限积分场光谱仪的灵敏度加倍

• 批准号: 1311102
• 负责人: Anne Kinney
• 金额: $ 96.78万
• 依托单位: California Association for Research in Astronomy
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-15 至 2017-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1311102&HistoricalAwards=false
• 关键词: detector; upgrade; OSIRIS; Doubling; sensitivity

An exciting benefit of the semiconductor revolution that has had tremendous impact on astronomy at optical and infrared wavelengths has been the development of ever more sensitive array detectors. These arrays are delivering hitherto-unimagined improvements in observing efficiency and enabling new and exciting science projects. This project plans to carry out an upgrade to the array detector in the OSIRIS instrument deployed on the 10 meter Keck telescope on top of Mauna Kea. The current science detector, called a Hawaii-2 (H2), will be replaced with a Hawaii-2RG (H2RG), which has a number of technical features that significantly enhance its performance.The OSIRIS instrument is an integral-field spectrograph (IFS) fed by adaptive optics (AO); there are only a few such combinations in operation worldwide at the moment. The non-common-path error is low, less than any other IFS, preserving the diffraction-limited point-spread-function delivered by the Keck AO system. This has been a very productive combination scientifically. The older array detector may be at some risk for failure simply due to its age; the newer array will offer higher sensitivity (twice as high at many wavelengths) and reduced detector artifacts. It will have improved multiplexer performance that will greatly reduce channel-to-channel crosstalk and eliminate a reset anomaly that degrades some of the readouts in a commonly-used mode of observing.The Keck telescopes have had a major impact on astronomy education, as evidenced by the 240 PhD theses (now averaging 20/year) produced as of early 2012 using Keck data. Many leaders in U.S. astronomy are included in this number. The WMKO (Keck Observatory) provides many graduate students and post-doctoral fellows direct access to state-of-the-art instrumentation, including adaptive optics. The OSIRIS upgrade project in particular will involve a graduate student at UCLA. Funding for this project is being provided by NSF's Division of Astronomical Sciences through its Advanced Technologies and Instrumentation program.

半导体革命的一个令人兴奋的好处是，在光学和红外波长上对天文学产生了巨大的影响，这就是更灵敏的阵列探测器的发展。 这些阵列在观测效率和实现新的令人兴奋的科学项目方面提供了前所未有的改进。 该项目计划对安装在莫纳克亚山顶部10米凯克望远镜上的OSIRIS仪器中的阵列探测器进行升级。 目前的科学探测器被称为夏威夷-2（H2），将被夏威夷-2 RG（H2 RG）所取代，后者具有许多技术特征，可显着提高其性能。OSIRIS仪器是一个由自适应光学（AO）提供的积分场光谱仪（IFS）;目前全球只有少数几个这样的组合在运行。 非公共路径误差很低，小于任何其他IFS，保留了由Keck AO系统提供的衍射限制点扩展函数。 这在科学上是一个非常富有成效的组合。 旧的阵列探测器可能由于其年龄而存在一定的故障风险;新的阵列将提供更高的灵敏度（在许多波长下是两倍）和减少的探测器伪影。 它将具有改进的多路复用器性能，这将大大减少通道间串扰，并消除复位异常，这种异常会降低常用观测模式下的一些读数。凯克望远镜对天文学教育产生了重大影响，截至2012年初，使用凯克数据产生的240篇博士论文（现在平均每年20篇）就证明了这一点。 美国天文学的许多领导人都包括在这个数字中。 WMKO（凯克天文台）为许多研究生和博士后研究员提供了直接使用最先进仪器的机会，包括自适应光学。 OSIRIS升级项目将特别涉及加州大学洛杉矶分校的一名研究生。 该项目的资金由NSF的天文科学部通过其先进技术和仪器计划提供。