Differences between revisions 151 and 152
Revision 151 as of 2019-03-15 11:23:49
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Editor: NaokoOhishi
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Revision 152 as of 2019-03-15 11:24:04
Size: 1619
Editor: NaokoOhishi
Comment:
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====MC mirrors==== ==== MC mirrors ====

Type-C (TAMA) suspension

  • Type-C suspension is a small double pendulum with intermediate mass passively damped by eddy current damping. Some of the type-C suspensions were once used for TAMA300, originally designed by K. Arai in 1990s. So type-C suspension is sometimes called as TAMA-type suspension.
  • Note by K. Arai(2014)

iKAGRA

In 2017, 5 Type-C suspensions were installed in iKAGRA.
In the final iKAGRA configuration, 7 mirrors were suspended and 6 of them were Type-C.

MC mirrors

Mode cleaner suspension are used even after the iKAGRA. PO(pick-off) type; MC_i, MC_e, MC_o with the mirror thickness of about 3cm, were installed. The others were TM(test mass) or RM type; ETMX, ETMY with the mirror thickness of about 6cm. The last 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

bKAGRA

Drawings

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