格陵兰望远镜的电子仪器系统
天体物理仪器与方法
2018-06-21 v1
摘要
格陵兰望远镜(GLT)项目近期参与了2018年4月使用甚长基线干涉测量技术对M87中心超大质量黑洞阴影成像的实验。天线由12米ALMA北美原型天线构成,经改造以支撑两个辅助侧容器并耐受极寒环境。该望远镜目前位于格陵兰的图勒空军基地,长期目标是将望远镜移至格陵兰冰盖上的Summit站。GLT目前有一个低温恒温器,容纳三个双偏振接收机,覆盖84-96 GHz、213-243 GHz和271-377 GHz频段。氢脉泽频率源与高频合成器结合用于生成接收机的本振参考。各接收机的中频输出覆盖4-8 GHz,经外差至基带后在一组ROACH-2单元内数字化,并格式化以记录到Mark-6数据记录器上。另一组并行工作的ROACH-2单元提供自相关功能以进行实时频谱分析。由于干涉测量对仪器稳定性要求严苛,设计中加入了诊断测试系统。将上述所有设备连接在一起的是为低温环境设计且可扩展的光纤系统,以适应Summit站时控制模块与望远镜间更大的距离。本文将报告上述电子仪器系统的进展。
引用
@article{arxiv.1806.07525,
title = {Electronics Instrumentation for the Greenland Telescope},
author = {Derek Kubo and Chih-Chiang Han and Hiroaki Nishioka and Ryan Chilson and Ranjani Srinivasan and Sheng- Feng Yen and Kuo-Chieh Fu and Homin Jiang and Kuan-Yu Liu and Ta-Shun Wei and Chih-Wei Huang and Chen- Yu Yu and Peter Oshiro and Shu-Hao Chang and Chung-Cheng Chen and Philippe Raffin and Yau-De Huang and Pierre Martin-Cocher and Ming-Tang Chen and Makoto Inoue and Satoki Matsushita and Keiichi Asada and Shoko Koyama and Patrick Koch and Paul T. P. Ho and Yang-Tai Shaw and Timothy J. Norton and Nimesh A. Patel and Shepherd S. Doeleman and Daniel Bintley and Craig Walther and Per Friberg and Jessica Dempsey and Hideo Ogawa and Kimihiro Kimura and Yutaka Hasegawa and Ching-Tang Liu and Kou-Chang Han and Song-Chu Chang and Li-Ming Lu},
journal= {arXiv preprint arXiv:1806.07525},
year = {2018}
}
备注
19 pages, 37 figures, oral presentation at the June 2018 SPIE conference: Astronomical Telescopes + Instrumentation, in the section on Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX