Prospects for wireless optical intensity interferometry with the Southern Connecticut stellar interferometer
Prospects for wireless optical intensity interferometry with the Southern Connecticut stellar interferometer
复制标题
南康涅狄格恒星干涉仪无线光强度干涉测量的前景
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
A. Gulinatti
中科院分区：
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作者：
E. Horch;Samuel A. Weiss;Justin D. Rupert;Ryan LaRue;P. Peronio;I. Rech;A. Gulinatti
南康涅狄格恒星干涉仪（SCSI）是一个双望远镜天文强度干涉仪，于2016年6月完成，自那时以来一直在获取光子相关数据。它在望远镜焦平面上使用单光子雪崩二极管（SPAD）探测器和一个中央定时模块，该模块同时记录来自两个望远镜的信号。在迄今为止进行的观测中，单像素SPAD已连接到从每个望远镜延伸到计时模块的信号电缆。然而，我们现在正在使仪器“无线”的过程中，在每个望远镜上使用单独的计时模块，并同步使用GPS计时卡记录的信号。我们还将其中一个台站升级为8像素SPAD设备，这使我们能够在各种观测条件下实现更高的计数率。在本文中，我们报告的仪器，包括在无线操作的准备工程测试的当前状态，我们讨论了在该模式下的预期能力。
The Southern Connecticut Stellar Interferometer (SCSI) is a two-telescope astronomical intensity interferometer that was completed in June 2016 and has been taking photon correlation data since that time. It uses single-photon avalanche diode (SPAD) detectors at the telescope focal plane and a central timing module, which records the signals from both telescopes simultaneously. In the observations taken to date, single-pixel SPADs have been connected to signal cables that stretch from each telescope to the timing module. However, we are now in the process of making the instrument “wireless” by using a separate timing module at each telescope and synchronizing the signals recorded using GPS timing cards. We have also upgraded one of the two stations with an 8-pixel SPAD device, which allows us to achieve higher count rates in a variety of observing conditions. In this paper, we report on the current state of the instrument, including engineering tests made in preparation for wireless operation, and we discuss the expected capabilities in that mode.