Mirror suspension system for the TAMA SAS

Akiteru Takamori*, Masaki Ando, Alessandro Bertolini, Giancarlo Cella, Riccardo DeSalvo, Mitsuhiro Fukushima, Yukiyoshi Iida, Florian Jacquier, Seiji Kawamura, Szabolcs Márka, Yuhiko Nishi, Kenji Numata, Virginio Sannibale, Kentaro Somiya, Ryutaro Takahashi, Hareem Tariq, Kimio Tsubono, Jose Ugas, Nicolas Viboud, Hiroaki YamamotoTatsuo Yoda, Chenyang Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)


Several R&D programmes are ongoing to develop the next generation of interferometric gravitational wave detectors providing the superior sensitivity desired for refined astronomical observations. In order to obtain a wide observation band at low frequencies, the optics need to be isolated from the seismic noise. The TAMA SAS (seismic attenuation system) has been developed within an international collaboration between TAMA, LIGO, and some European institutes, with the main objective of achieving sufficient low-frequency seismic attenuation (-180 dB at 10 HZ). The system suppresses seismic noise well below the other noise levels starting at very low frequencies above 10 Hz. It also includes an active inertial damping system to decrease the residual motion of the optics enough to allow a stable operation of the interferometer. The TAMA SAS also comprises a sophisticated mirror suspension subsystem (SUS). The SUS provides support for the optics and vibration isolation complementing the SAS performance. The SUS is equipped with a totally passive magnetic damper to suppress internal resonances without degrading the thermal noise performance. In this paper we discuss the SUS details and present prototype results.

Original languageEnglish
Pages (from-to)1615-1621
Number of pages7
JournalClassical and Quantum Gravity
Issue number7
Publication statusPublished - 2002 Apr 7
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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