Update on quadruple suspension design for Advanced LIGO

作者：Aston S M; Barton M A; Bell A S; Beveridge N; Bland B; Brummitt A J; Cagnoli G; Cantley C A; Carbone L; Cumming A V; Cunningham L; Cutler R M; Greenhalgh R J S; Hammond G D; Haughian K; Hayler T M; Heptonstall A; Heefner J; Hoyland D; Hough J; Jones R; Kissel J S; Kumar R; Lockerbie N A; Lodhia D; Martin I W; Murray P G; O' Dell J; Plissi M V; Reid S; Romie J; Robertson N A^*; Rowan S; Shapiro B

来源：Classical and Quantum Gravity, 2012, 29(23): 235004.

DOI：10.1088/0264-9381/29/23/235004

We describe the design of the suspension systems for the major optics for Advanced LIGO, the upgrade to LIGO-the Laser Interferometric Gravitational-WaveObservatory. The design is based on that used in GEO600-the German/UK interferometric gravitational wave detector, with further development to meet the more stringent noise requirements for Advanced LIGO. The test mass suspensions consist of a four-stage or quadruple pendulum for enhanced seismic isolation. To minimize suspension thermal noise, the final stage consists of a silica mirror, 40 kg in mass, suspended from another silica mass by four silica fibres welded to silica ears attached to the sides of the masses using hydroxide-catalysis bonding. The design is chosen to achieve a displacement noise level for each of the seismic and thermal noise contributions of 10(-19) m/root Hz at 10 Hz, for each test mass. We discuss features of the design which has been developed as a result of experience with prototypes and associated investigations.

• 出版日期2012-12-7