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

Differences between revisions 132 and 133

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.

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

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

-  ⇤ ← Revision 132 as of 2016-08-09 10:56:09 → 
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  Editor: NaokoOhishi
  Comment:
+   ← Revision 133 as of 2017-11-17 12:11:47 → ⇥
  Size: 1550
  Editor: NaokoOhishi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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- Five TAMA-type suspensions were used in iKAGRA.<<BR>>
+ In 2017, 5 Type-C suspensions are installed in iKAGRA.<<BR>>
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- and 2 are TM(test mass) or RM type; ETMX, ETMY with the mirror thickness of 6cm.
+ and 2 are TM(test mass) or RM type; ETMX, ETMY with the mirror thickness of about 6cm.