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Size: 860
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Size: 1585
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| == Type-C suspension == | == Type-C (TAMA) suspension == |
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| Type-C suspension is relatively small double pendulum. Among the big suspensions used in KAGRA, type-C is the smallest. Some of them were once used for TAMA300, originally designed by K. Arai in 1990s. So "TAMA-type suspension" is Type-C 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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| Five TAMA-type suspensions were used for iKAGRA.<<BR>> In the final iKAGRA configuration, 6 mirrors are suspended and 5 of them are Type-C. 3 PO type; MC_i, MC_e, MC_o and 2 TM or RM type; ETMX, ETMY. |
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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| === Toward bKAGRA === | * ETM Transfer function * long term drift |
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| === bKAGRA === *Two suspensions used at the X/Y ends, are used as IMMT1 and IMMT2 for bKAGRA. |
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| *[[KAGRA/Subgroups/VIS/Type-C/IMMT|IMMT Preparation]] | |
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=== Drawings === *OSEM *[[KAGRA/Subgroups/VIS/Type-C/Drawings|Drawings]] *Magnet and standoff fixture jig *[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/IMC%20Suspension|Documents]] *[[KAGRA/Subgroups/VIS/Type-C/IMC_Suspension|IMC_suspension]] |
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
bKAGRA
- Two suspensions used at the X/Y ends, are used as IMMT1 and IMMT2 for bKAGRA.
bKAGRA
Drawings
- OSEM
- Magnet and standoff fixture jig