Stanford Program in Support of LIGO - Seismic Isolation and Controls

斯坦福大学支持 LIGO 的项目 - 地震隔离和控制

• 批准号: 1708006
• 负责人: Robert Byer
• 金额: $ 165万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-12-01 至 2021-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1708006&HistoricalAwards=false
• 关键词: Stanford; Program; Support; LIGO; Seismic

In modern telescopes, much of the instrument's value lies in the stability of the mount and tracking. This is especially true for the Laser Interferometer Gravitational-wave Observatory (LIGO) - the value of the suspension and isolation is paramount because the mirrors must be suspended above the shaking ground. The work at Stanford is focused on the design and implementation of the mount that supports the optics for the 4-km long LIGO interferometer. The current facilities excel at isolating LIGO from the typical shaking of the ground; this grant will fund several related efforts to improve the robust operation of the LIGO detectors during large seismic disturbances, and it will also fund development of new techniques to isolate the optics of future, cryogenic detectors.To improve the duty cycle of the existing observatories, this grant supports work to mitigate the impact of wind storms on the detectors by combining computational fluid dynamics, wind tunnel tests, and observatory field measurements to develop low-cost wind barriers and improved control algorithms. The grant also supports development and testing of novel control schemes to help improve the operation of the detector during large, teleseismic earthquakes. Recent work has shown that nearly 90% of the low frequency ground motion during an earthquake is common to all the optics in the detector. The new research will actively coordinate the motion of all the platforms to simultaneously minimize the common-mode drives and the differential-mode motion over the 4-km length of the observatory. The large reduction in control force, and the improvement in differential excursions is expected to significantly improve the overall robustness of the detector. Stanford University operates the Engineering Test Facility, a 10-meter vacuum system with a prototype isolation system, where integrated hardware and software development for gravitational wave development is conducted. This grant funds research in this facility for seismic isolation of observatories which are now in the early planning stages. Future detectors are expected to use cooled optics to reduce the thermally driven (Brownian) noise of the mirrors. However, these mirrors will have more than a megawatt of laser power incident upon them, so running them at cryogenic temperatures requires the ability to continuous remove significant thermal energy. Techniques to do this will be tested on the prototype isolation platform so that the requirements for cooling and vibration control can be developed and tested simultaneously.

在现代望远镜中，仪器的大部分价值在于安装和跟踪的稳定性。 对于激光干涉仪引力波天文台 (LIGO) 来说尤其如此 - 悬挂和隔离的价值至关重要，因为镜子必须悬挂在震动的地面上方。 斯坦福大学的工作重点是设计和实现支持 4 公里长 LIGO 干涉仪光学器件的安装座。目前的设施擅长将 LIGO 与典型的地面震动隔离开来。这笔赠款将资助多项相关工作，以提高 LIGO 探测器在大地震扰动期间的稳健运行，还将资助开发新技术来隔离未来低温探测器的光学器件。为了改善现有观测站的占空比，这笔赠款支持通过结合计算流体动力学、风洞测试和观测站现场测量来开发低成本的产品，以减轻风暴对探测器的影响。 风障和改进的控制算法。该赠款还支持新型控制方案的开发和测试，以帮助改善探测器在大型远震地震期间的运行。最近的研究表明，地震期间近 90% 的低频地面运动是探测器中所有光学器件所共有的。新研究将积极协调所有平台的运动，以同时最大限度地减少天文台 4 公里长范围内的共模驱动和差模运动。控制力的大幅降低和微分偏移的改善预计将显着提高探测器的整体鲁棒性。 斯坦福大学运营着工程测试设施，这是一个带有原型隔离系统的 10 米真空系统，在这里进行引力波开发的集成硬件和软件开发。这笔赠款资助了该设施的天文台隔震研究，目前正处于早期规划阶段。未来的探测器预计将使用冷却光学器件来减少镜子的热驱动（布朗）噪声。然而，这些镜子将有超过兆瓦的激光功率入射到它们上，因此在低温下运行它们需要能够连续去除大量热能。实现这一目标的技术将在原型隔离平台上进行测试，以便可以同时开发和测试冷却和振动控制的要求。

项目成果

Improving astrophysical parameter estimation via offline noise subtraction for Advanced LIGO

• DOI: 10.1103/physrevd.99.042001
• 发表时间: 2018-06
• 期刊: Physical Review D
• 影响因子: 5
• 作者: J. Driggers;S. Vitale;A. Lundgren;M. Evans;K. Kawabe;S. Dwyer;K. Izumi;R. Schofield;A. Effler;D. Sigg;P. Fritschel;M. Drago;A. Nitz;B. Abbott;R. Abbott;T. Abbott;C. Adams;R. Adhikari;V. Adya;A. Ananyeva;S. Appert;K. Arai;S. Aston;C. Austin;S. Ballmer;D. Barker;B. Barr;L. Barsotti;J. Bartlett;I. Bartos;J. Batch;A. Bell;J. Betzwieser;G. Billingsley;J. Birch;S. Biscans;C. Blair;R. Blair;R. Bork;A. Brooks;H. Cao;G. Ciani;F. Clara;S. Cooper;P. Corban;S. Countryman;P. Covas;M. Cowart;D. Coyne;A. Cumming;L. Cunningham;K. Danzmann;C. F. S. Costa;E. Daw;D. DeBra;R. DeSalvo;K. Dooley;S. Doravari;T. Edo;T. Etzel;T. Evans;H. Fair;Á. Fernández-Galiana;E. Ferreira;R. Fisher;H. Fong;R. Frey;V. Frolov;P. Fulda;M. Fyffe;B. Gateley;J. Giaime;K. Giardina;E. Goetz;R. Goetz;S. Gras;C. Gray;H. Grote;K. Gushwa;E. Gustafson;R. Gustafson;E. Hall;G. Hammond;J. Hanks;J. Hanson;T. Hardwick;G. Harry;M. Heintze;A. Heptonstall;J. Hough;R. Jones;S. Kandhasamy;S. Karki;M. Kasprzack;S. Kaufer;R. Kennedy;N. Kijbunchoo;W. Kim;E. King;P. King;J. Kissel;W. Korth;G. Kuehn;M. Landry;B. Lantz;M. Laxen;J. Liu;N. Lockerbie;M. Lormand;M. Macinnis;D. Macleod;S. Márka;Z. Márka;A. Markosyan;E. Maros;P. Marsh;I. Martin;D. Martynov;K. Mason;T. Massinger;F. Matichard;N. Mavalvala;R. McCarthy;D. McClelland;S. Mccormick;L. McCuller;J. McIver;D. McManus;T. McRae;G. Mendell;E. Merilh;P. Meyers;R. Mittleman;K. Mogushi;D. Moraru;G. Moreno;C. Mow-Lowry;G. Mueller;N. Mukund;A. Mullavey;J. Munch;T. Nelson;P. Nguyen;L. Nuttall;J. Oberling;M. Oliver;P. Oppermann;R. Oram;B. O'reilly;D. Ottaway;H. Overmier;J. R. Palamos;W. Parker;A. Pele;S. Penn;C. Perez;M. Phelps;V. Pierro;I. Pinto;M. Pirello;M. Principe;L. Prokhorov;O. Puncken;V. Quetschke;E. Quintero;H. Radkins;P. Raffai;K. Ramirez;S. Reid;D. Reitze;N. Robertson;J. Rollins;V. Roma;C. Romel;J. Romie;M. Ross;S. Rowan;K. Ryan;T. Sadecki;E. Sanchez;L. Sanchez;V. Sandberg;R. Savage;D. Sellers;D. Shaddock;T. Shaffer;B. Shapiro;D. Shoemaker;B. Slagmolen;B. Smith;J. R. Smith;B. Sorazu;A. Spencer;K. Strain;D. Tanner;R. Taylor;M. Thomas;P. Thomas;K. Thorne;E. Thrane;K. Toland;C. Torrie;G. Traylor;M. Tse;D. Tuyenbayev;G. Vajente;G. Valdes;A. V. Veggel;S. Vass;A. Vecchio;P. Veitch;K. Venkateswara;Gautam Venugopalan;T. Vo;C. Vorvick;M. Walker;R. Ward;J. Warner;B. Weaver;R. Weiss;P. Wessels;B. Willke;C. Wipf;J. Worden;H. Yamamoto;C. Yancey;Hang Yu;Haocun Yu;L. Zhang;M. Zucker;J. Zweizig

GW170817: Measurements of Neutron Star Radii and Equation of State

• DOI: 10.1103/physrevlett.121.161101
• 发表时间: 2018-10-15
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Abbott, B. P.;Abbott, R.;Zweizig, J.
• 通讯作者: Zweizig, J.

Sensitivity and performance of the Advanced LIGO detectors in the third observing run

• DOI: 10.1103/physrevd.102.062003
• 发表时间: 2020-09-11
• 期刊: PHYSICAL REVIEW D
• 影响因子: 5
• 作者: Buikema, A.;Cahillane, C.;Zweizig, J.
• 通讯作者: Zweizig, J.

Control strategy to limit duty cycle impact of earthquakes on the LIGO gravitational-wave detectors

限制地震占空比对 L​​IGO 引力波探测器影响的控制策略

• DOI: 10.1088/1361-6382/aaa4aa
• 发表时间: 2018
• 期刊: Classical and Quantum Gravity
• 影响因子: 3.5
• 作者: Biscans, S;Warner, J;Mittleman, R;Buchanan, C;Coughlin, M;Evans, M;Gabbard, H;Harms, J;Lantz, B;Mukund, N
• 通讯作者: Mukund, N

Quantum-Enhanced Advanced LIGO Detectors in the Era of Gravitational-Wave Astronomy

• DOI: 10.1103/physrevlett.123.231107
• 发表时间: 2019-12-05
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Tse, M.;Yu, Haocun;Zweizig, J.
• 通讯作者: Zweizig, J.