Differences between revisions 136 and 137
Revision 136 as of 2019-01-10 15:11:23
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Editor: NaokoOhishi
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Revision 137 as of 2019-02-05 16:22:35
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Editor: NaokoOhishi
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Deletions are marked like this. Additions are marked like this.
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 Type-C suspension is a relatively 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.  Type-C suspension is relatively small double pendulum suspension 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.
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 In 2017, 5 Type-C suspensions are installed in iKAGRA.<<BR>>
 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.
 In 2017, 5 Type-C suspensions were installed in iKAGRA.<<BR>>
 In the final iKAGRA configuration, 7 mirrors were suspended and 6 of them were Type-C.
 Three were PO(pick-off) type; MC_i, MC_e, MC_o with the mirror thickness of about 3cm,
 and 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.
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 *Two suspensions that were used as at the X/Y end, will be used at IMMT for bKAGRA.  *Two suspensions used at the X/Y ends, will be used as IMMT for bKAGRA.

Type-C (TAMA) suspension

  • Type-C suspension is relatively small double pendulum suspension 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.

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. Three were PO(pick-off) type; MC_i, MC_e, MC_o with the mirror thickness of about 3cm, and 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

Toward bKAGRA

bKAGRA

References

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