Anatomy of the TAMA SAS seismic attenuation system

Details Anatomy of the TAMA SAS seismic attenuation system Anatomy of the TAMA SAS seismic attenuation system

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cqgra..19.1605m&link_type=abstract

Classical and Quantum Gravity, Volume 19, Issue 7, pp. 1605-1614 (2002).

Computer Science

Performance

21

Scientific paper

The TAMA SAS seismic attenuation system was developed to provide the extremely high level of seismic isolation required by the next generation of interferometric gravitational wave detectors to achieve the desired sensitivity at low frequencies. Our aim was to provide good performance at frequencies above ~10 Hz, while utilizing only passive subsystems in the sensitive frequency band of the TAMA interferometric gravitational wave detectors. The only active feedback is relegated below 6 Hz and it is used to damp the rigid body resonances of the attenuation chain. Simulations, based on subsystem performance characterizations, indicate that the system can achieve rms mirror residual motion measured in a few tens of nanometres. We will give a brief overview of the subsystems and point out some of the characterization results, supporting our claims of achieved performance. SAS is a passive, UHV compatible and low cost system. It is likely that extremely sensitive experiments in other fields will also profit from our study.

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