Diff for "KAGRA/Subgroups/VIS/Type-C"

Differences between revisions 1 and 129 (spanning 128 versions)

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

Five TAMA-type suspensions were used 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 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.
Memo by Yamamoto-san
IMMT Preparation
IMC Modification

bKAGRA

Design change for new suspensions

References

OSEM
Drawings
Jig

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+   ← Revision 129 as of 2016-08-09 10:37:40 → ⇥
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-Describe KAGRA/Subgroups/VIS/Type-C here.
+== 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 ===

 Five TAMA-type suspensions were used 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 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 [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|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.
 [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Memo by Yamamoto-san]]
 *[[KAGRA/Subgroups/VIS/Type-C/IMMT|IMMT Preparation]]
 *[[KAGRA/Subgroups/VIS/Type-C/IMC|IMC Modification]]
=== bKAGRA ===
 
 [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Type-C/Design2016|Design change for new suspensions]]

=== References ===
 *OSEM
 *Drawings
 *Jig