改善高级LIGO探测器的鲁棒性到地震

论文标题

改善高级LIGO探测器的鲁棒性到地震

Improving the Robustness of the Advanced LIGO Detectors to Earthquakes

论文作者

Schwartz, Eyal, Pele, A, Warner, J, Lantz, B, Betzwieser, J, Dooley, K L, Biscans, S, Coughlin, M, Mukund, N, Abbott, R, Adams, C, Adhikari, R X, Ananyeva, A, Appert, S, Arai, K, Areeda, J S, Asali, Y, Aston, S M, Austin, C, Baer, A M, Ball, M, Ballmer, S W, Banagiri, S, Barker, D, Barsotti, L, Bartlett, J, Berger, B K, Bhattacharjee, D, Billingsley, G, Blair, C D, Blair, R M, Bode, N, Booker, P, Bork, R, Bramley, A, Brooks, A F, Brown, D D, Buikema, A, Cahillane, C, Cannon, K C, Chen, X, Ciobanu, A A, Clara, F, Cooper, S J, Corley, K R, Countryman, S T, Covas, P B, Coyne, D C, Datrier, L E H, Davis, D, Di Fronzo, C, Driggers, J C, Dupej, P, Dwyer, S E, Effler, A, Etze, T, Evans, M, Evans, T M, Feicht, J, Fernandez-Galiana, A, Fritschel, P, Frolov, V V, Fulda, P, Fyffe, M, Giaime, J A, Giardina, K D, Godwin, P, Goetz, E, Gras, S, Gray, C, Gray, R, Green, A C, Gupta, Anchal, Gustafson, E K, Gustafson, R, Hanks, J, Hanson, J, Hardwick, T, Hasskew, R K, Heintze, M C, Helmling-Cornell, A F, Holland, N A, Jones, J D, Kandhasamy, S, Karki, S, Kasprzack, M, Kawabe, K, Kijbunchoo, N, King, P J, Kissel, J S, Kumar, Rahul, Landry, M, Lane, B B, Laxen, M, Lecoeuche, Y K, Leviton, J, Liu, J, Lormand, M, Lundgren, A P, Macas, R, MacInnis, M, Macleod, D M, Mansell, G L, arka, S M, arka, Z M, Martynov, D V, Mason, K, Massinger, T J, Matichard, F, Mavalvala1, N, McCarthy, R, McClelland, D E, McCormick, S, McCuller, L, McIver, J, McRae, T, Mendell, G, Merfeld, K, Merilh, E L, Meylahn, F, Mistry, T, Mittleman, R, Moreno, G, Mow-Lowry, C M, Mozzon, S, Mullavey, A, Nelson, T J N, Nguyen, P, Nuttall, L K, Oberling, J, Oram, Richard J, Osthelder, C, Ottaway, D J, Overmier, H, Palamos, J R, Parker, W, Payne, E, Perez, C J, Pirello, M, Radkins, H, Ramirez, K E, Richardson, J W, Riles, K, Robertson, N A, Rollins, J G, Romel, C L, Romie1, J H, Ross, M P, Ryan, K, Sadecki, T, Sanchez, E J, Sanchez, L E, Saravanan, T R, Savage, R L, Schaetzl, D, Schnabel, R, Schofield, R M S, Sellers, D, Shaffer, T, Sigg, D, Slagmolen, B J J, Smith, J R, Soni, S, Sorazu, B, Spencer, A P, Strain, K A, Sun, L, Szczepanczyk, M J, Thomas, M, Thomas, P, Thorne, K A, Toland, K, Torrie, C I, Traylor, G, Tse, M, Urban, A L, Vajente, G, Valdes, G, Vander-Hyde, D C, Veitch, P J, Venkateswara, K, Venugopalan, G, Viets, A D, Vo, T, Vorvick, C, Wade, M, Ward, R L, Weaver, B, Weiss, R, Whittle, C, Willke, B, Wipf, C C, Xiao, L, Yamamoto, H, Yu, Hang, Yu, Haocun, Zhang, L, Zucker, M E, Zweizig, J

论文摘要

远距离震动或远处的地震会定期破坏基于地面的引力检测器（例如晚期Ligo）的操作。在这里，我们介绍了一种新的全局控制方案\ emph {eq mode}，该方案由一组自动化的优化控制滤波器序列组成，该滤波器在地震期间降低和协调地震隔离平台的运动。反过来，这又抑制了干涉仪臂相对于彼此的差异运动，从而导致频率低于100 \，MHz的DARM信号的降低。我们的方法极大地提高了干涉仪在地震期间保持运行的能力，地面速度高达3.9 \，$μ\ mbox {m/s} $ rms沿光束方向，为两个检测器设定了新的记录。这在高级Ligo探测器管理地震引起的高地面运动的能力的地震控制中设定了一个里程碑，为在其他极端环境条件下进一步稳健运行打开了一条路径。

Teleseismic, or distant, earthquakes regularly disrupt the operation of ground--based gravitational wave detectors such as Advanced LIGO. Here, we present \emph{EQ mode}, a new global control scheme, consisting of an automated sequence of optimized control filters that reduces and coordinates the motion of the seismic isolation platforms during earthquakes. This, in turn, suppresses the differential motion of the interferometer arms with respect to one another, resulting in a reduction of DARM signal at frequencies below 100\,mHz. Our method greatly improved the interferometers' capability to remain operational during earthquakes, with ground velocities up to 3.9\,$μ\mbox{m/s}$ rms in the beam direction, setting a new record for both detectors. This sets a milestone in seismic controls of the Advanced LIGO detectors' ability to manage high ground motion induced by earthquakes, opening a path for further robust operation in other extreme environmental conditions.

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