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 *[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/IMC%20Suspension|Documents]]

Type-C (TAMA) suspension

  • Type-C suspension is a relatively small double pendulum with intermediate mass passively damped with eddy current damping. Among the large suspensions used in KAGRA, type-C is the smallest one. Some of the type-C were once used for TAMA300, originally designed by K. Arai in 1990s. So type-C suspension is sometimes called as TAMA-type suspension.

iKAGRA

  • In 2017, 5 Type-C suspensions are installed in iKAGRA.
    In the final iKAGRA configuration, 7 mirrors are suspended and 6 of them are Type-C. Three are PO(pick-off) type; MC_i, MC_e, MC_o with the mirror thickness with about 3cm, and 2 are TM(test mass) or RM type; ETMX, ETMY with the mirror thickness of about 6cm. Other one is coming from CLIO, the size of the BS mirror was 4cm in thickness and 15cm in diameter.

    Work log about 2 iKAGRA ETMs is here.

  • ETM Transfer function
  • long term drift

Toward bKAGRA

bKAGRA

References

KAGRA/Subgroups/VIS/Type-C (last edited 2020-04-30 12:05:11 by KousekiMiyo)