The Hobby-Eberly Telescope Completion Project
The Hobby-Eberly Telescope Completion Project
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霍比-埃伯利望远镜竣工项目
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
E. L. Robinson
中科院分区：
文献类型：
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作者：
J. Booth;M. Wolf;J. Fowler;M. T. Adams;J. Good;P. W. Kelton;E. Barker;P. Palunas;F. Bash;L. Ramsey;G. Hill;P. Macqueen;M. Cornell;E. L. Robinson
霍比-埃伯利望远镜(HET)是一个固定高度的9.2米望远镜，有一个球面主镜和一个主焦点跟踪器来跟踪天文物体。该望远镜在1994-1997年间耗资1390万美元建造。在建造后，发现并纠正了一些望远镜性能缺陷。剩下的问题包括：1)视顶，2)初始镜段对准精度不足，3)镜段随时间不对准。HET完成项目创建于2001年5月，目的是解决这些问题，并查明和解决下一层问题。为了解决穹顶问题，安装了大型百叶窗，并于2002年5月投入使用。目前还在努力消除或抑制穹顶环境内的热源。为了解决节段对准精度问题，制造了一个原型Shack-Hartmann设备--镜像对准恢复系统(MARS)，并在HET进行了常规使用。节段对准维护系统(SAMS)已投入早期运行，并显著提高了望远镜的性能。2001年7月，两台差动图像运动监视器(DIMM)望远镜投入正常运行，以量化HET的大气能见度。随着这些改进的实施，望远镜的图像质量有了显著的提高。已经制定了解决其他性能问题的计划。
The Hobby-Eberly Telescope (HET) is a fixed-elevation, 9.2-m telescope with a spherical primary mirror and a tracker at prime focus to follow astronomical objects. The telescope was constructed for $13.9M over the period 1994-1997. A number of telescope performance deficiencies were identified and corrected following construction. Remaining problems included: 1) Dome seeing, 2) inadequate initial mirror segment alignment accuracy, and 3) mirror segment misalignment with time. The HET Completion Project was created in May 2001 to attack these problems and to identify and solve the next tier of problems. To address dome seeing, large louvers were installed and in operation by May 2002. Efforts are also underway to eliminate or suppress heat sources within the dome environment. To address segment alignment accuracy, a prototype Shack-Hartmann device, the Mirror Alignment Recovery System (MARS), was built and is in routine use at HET. The Segment Alignment Maintenance System (SAMS) is in early operation and has markedly improved telescope performance. Two Differential Image Motion Monitor (DIMM) telescopes were brought into regular operation in July 2001 to quantify atmospheric seeing at HET. As these improvements have been implemented, telescope image quality has improved significantly. Plans are in place to address additional performance issues.