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Size: 1640
Comment:
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Size: 1619
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| 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. | 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. *[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/IMC%20Suspension|Note by K. Arai(2014)]] |
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| 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. |
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. ==== 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. |
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| Work log about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]]. | Work log about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]]. |
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| === Toward bKAGRA === | === bKAGRA === |
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| *Two suspensions used at the X/Y ends, will be used as IMMT for bKAGRA. [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Memo by Yamamoto-san]] |
*Two suspensions used at the X/Y ends, are used as IMMT1 and IMMT2 for bKAGRA. [[KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Memo by Yamamoto-san]] |
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| *[[KAGRA/Subgroups/VIS/Type-C/IMC|IMC Modification]] === bKAGRA === |
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| [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Type-C/Design2016|Design change for new suspensions]] | *[[KAGRA/Subgroups/VIS/Type-C/Design2016|Design change for new suspensions(by K. Arai)]] |
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| === References === *OSEM |
=== Drawings === *[[KAGRA/Subgroups/VIS/Type-C/OSEM|OSEM]] |
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| *[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/IMC%20Suspension|Documents]] *[[KAGRA/Subgroups/VIS/Type-C/IMC_Suspension|IMC_suspension]] |
*[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/IMC%20Suspension|IMC_suspension]] |
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.
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
- Two suspensions used at the X/Y ends, are used as IMMT1 and IMMT2 for bKAGRA.
Drawings
- Magnet and standoff fixture jig