Jitter studies for the secondary and tertiary mirror systems on the Thirty Meter Telescope
Jitter studies for the secondary and tertiary mirror systems on the Thirty Meter Telescope
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DOI：
10.1117/12.2055036
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
V. Ford;C. Carter;C. Delrez;Pierluigi Fumi;E. Gabriel;D. Gallieni
中科院分区：
文献类型：
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作者：
V. Ford;C. Carter;C. Delrez;Pierluigi Fumi;E. Gabriel;D. Gallieni
30米望远镜（TMT）的第二反射镜系统（M2S）和第三反射镜系统（M3S）由被动安装的反射镜组成，这些反射镜支撑在运动单元组件中，这些运动单元组件在望远镜跟踪期间移动以抵消变化的天顶角和望远镜结构内的热梯度的影响。TMT担心，M2和M3系统自适应光学跟踪期间的指向抖动要求非常具有挑战性，可能需要复杂的稳定系统才能合规。对这两个系统进行了研究，以确定是否存在可以满足TMT抖动要求的类似不稳定硬件。然后使用代表性的TMT跟踪运动进行测试，以测量类似的现有硬件上的抖动。分析了这些硬件测试的结果。给出了测试结果、剩余风险评估和进一步测试计划。
The Secondary Mirror System (M2S) and Tertiary Mirror System (M3S) of the Thirty Meter Telescope (TMT) consist of passively mounted mirrors supported in kinematic cell assemblies that are moved during telescope tracking to counteract effects of changing zenith angle and thermal gradients within the telescope structure. TMT is concerned that the requirements for pointing jitter during Adaptive Optics tracking for the M2 and M3 Systems are very challenging with a risk of requiring complex stabilization systems for compliance. Both systems were researched to determine whether similar un-stabilized hardware exists that can meet the TMT jitter requirements. Tests using representative TMT tracking motions were then performed to measure jitter on similar existing hardware. The results of these hardware tests have been analyzed. Test results, remaining risk assessment and further testing plans are presented.