TY - JOUR
T1 - Pendulum mode thermal noise in advanced interferometers
T2 - A comparison of fused silica fibers and ribbons in the presence of surface loss
AU - Gretarsson, Andri M.
AU - Harry, Gregory M.
AU - Penn, Steven D.
AU - Saulson, Peter R.
AU - Startin, William J.
AU - Rowan, Sheila
AU - Cagnoli, Gianpietro
AU - Hough, Jim
N1 - Funding Information:
We would like to thank our colleagues at the University of Glasgow, at Stanford University, and throughout the gravitational wave community for their interest in this work. Additional thanks to Ken Strain for his help with LIGO II parameters beyond the white paper as well as Gabriela Gonzalez, Gary Sanders, David Tanner, and Rai Weiss for their comments. This work was supported by Syracuse University, US National Science Foundation Grants No. PHY-9602157 and No. PHY-9630172, the University of Glasgow, and PPARC.
PY - 2000/5/29
Y1 - 2000/5/29
N2 - The use of fused-silica ribbons as suspensions in gravitational wave interferometers can result in significant improvements in pendulum mode thermal noise. Surface loss sets a lower bound to the level of noise achievable, at what level depends on the dissipation depth and other physical parameters. For LIGO II, the high breaking strength of pristine fused silica filaments, the correct choice of ribbon aspect ratio (to minimize thermoelastic damping), and low dissipation depth combined with the other achievable parameters can reduce the pendulum mode thermal noise in a ribbon suspension well below the radiation pressure noise. Despite producing higher levels of pendulum mode thermal noise, cylindrical fiber suspensions provide an acceptable alternative for LIGO II, should unforeseen problems with ribbon suspensions arise. (C) 2000 Elsevier Science B.V.
AB - The use of fused-silica ribbons as suspensions in gravitational wave interferometers can result in significant improvements in pendulum mode thermal noise. Surface loss sets a lower bound to the level of noise achievable, at what level depends on the dissipation depth and other physical parameters. For LIGO II, the high breaking strength of pristine fused silica filaments, the correct choice of ribbon aspect ratio (to minimize thermoelastic damping), and low dissipation depth combined with the other achievable parameters can reduce the pendulum mode thermal noise in a ribbon suspension well below the radiation pressure noise. Despite producing higher levels of pendulum mode thermal noise, cylindrical fiber suspensions provide an acceptable alternative for LIGO II, should unforeseen problems with ribbon suspensions arise. (C) 2000 Elsevier Science B.V.
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U2 - 10.1016/S0375-9601(00)00295-4
DO - 10.1016/S0375-9601(00)00295-4
M3 - Article
AN - SCOPUS:0034729058
SN - 0375-9601
VL - 270
SP - 108
EP - 114
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 3-4
ER -