CHOUGH: current status and future plans

CHOUGH: current status and future plans
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CHOUGH:现状和未来计划

DOI:
10.1117/12.2313172
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发表时间:
2018
期刊:
--
影响因子:
--
通讯作者:
Henry D
Henry D
中科院分区:
--
文献类型:
--
作者:
Henry D

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Canary 高阶自适应光学托管升级是 R 和 I 波段高阶 SCAO 实验测试台,旨在利用 4.2m 威廉·赫歇尔望远镜的 Canary 实验。 Chough 由一个拾取器组成,该拾取器将来自 Canary 的第二个 DM 之后的光转移到托管 Chough 子系统的定制面包板上。这些主要包括 ADC、光继电器、1020 执行器 DM、31 x 31 SH-WFS,最后是科学成像仪。每个子系统都很详细,重点是有趣和不寻常的功能。作为一项综合实验,首先描述了 2016 年 10 月的空中工程运行,然后在 2017 年期间将 Chough 作为独立仪器重新集成到实验室中。在后一种形式中,它是专用于高阶 AO 的附加仪器的主机。简要描述的一个例子是 CAWS 干涉仪,其设计用于在宽色度带宽上产生绝对相位残差测量(本次会议中的论文#10703-212)。我们报告了出于成本原因而做出的设计决策的后果、工作台的基本性能、迄今为止项目各个阶段所吸取的经验教训,最后描述了 Chough 未来在可见光和近红外领域进行高阶 SCAO 研究的计划。
The Canary Hosted Upgrade for High-Order Adaptive Optics is an experimental test-bench for high-order SCAO, in R-and I-bands, designed to utilize the Canary experiment at the 4.2m William Herschel Telescope. Chough consists of a pick-off that diverts light from after the 2nd DM in Canary up onto a custom breadboard which hosts the Chough sub-systems. These consist primarily of a ADC, an optical relay, a 1020-actuator DM, a 31 x 31 SH-WFS, and finally a Science Imager. Each of these sub-systems is detailed, with emphasis on interesting and unusual features. As an integrated experiment, the October/2016 on-sky engineering run is first described and then the re-integration of Chough in the laboratory during 2017 as a standalone instrument. In its latter guise, it is a host for additional instrumentation dedicated for high-order AO. An example briefly described is the CAWS interferometer, designed to produce absolute phase residual measurements over a wide chromatic bandwidth (paper #10703-212 in this meeting). We report on consequences of design decisions made for cost reasons, the bench’s fundamental performance, lessons learnt during the various stages of the project so far, and end by describing plans for Chough’s exploitation in the future for high-order SCAO research in the visible and near-IR.
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