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| == Type-C suspension == | == Type-C (TAMA) suspension == |
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| Five TAMA-type suspensions were used in iKAGRA.<<BR>> In the final iKAGRA configuration, 6 mirrors are suspended and 5 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 6cm. |
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. |
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* ETM Transfer function * long term drift |
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| *Two suspensions that were used as at the X/Y end, will be used at IMMT for bKAGRA. | |
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| *[[KAGRA/Subgroups/VIS/Type-C/IMMT|IMMT Preparation]] *[[KAGRA/Subgroups/VIS/Type-C/IMC|IMC Modification]] |
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=== References === *OSEM *[[KAGRA/Subgroups/VIS/Type-C/Drawings|Drawings]] *Magnet and standoff fixture jig *[[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
- Two suspensions that were used as at the X/Y end, will be used at IMMT for bKAGRA.
bKAGRA