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

Differences between revisions 118 and 137 (spanning 19 versions)

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

Toward bKAGRA

Two suspensions used at the X/Y ends, will be used as IMMT for bKAGRA.
Memo by Yamamoto-san
IMMT Preparation
IMC Modification

bKAGRA

Design change for new suspensions

References

OSEM
Drawings
Magnet and standoff fixture jig
Documents
IMC_suspension

-  ⇤ ← Revision 118 as of 2016-03-01 12:34:45 → 
  Size: 1064
  Editor: NaokoOhishi
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+   ← Revision 137 as of 2019-02-05 16:22:35 → ⇥
  Size: 1640
  Editor: NaokoOhishi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-== Type-C suspension ==
+== Type-C (TAMA) suspension ==
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- Type-C suspension is a relatively small double pendulum with intermediate mass passively damped with eddy current damping. Among the big 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.
+ 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 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 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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+Line 14:
+ * ETM Transfer function
 * long term drift
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+Line 20:
+ *Two suspensions used at the X/Y ends, will be used as IMMT for bKAGRA.
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+Line 22:
+ *[[KAGRA/Subgroups/VIS/Type-C/IMMT|IMMT Preparation]]
 *[[KAGRA/Subgroups/VIS/Type-C/IMC|IMC Modification]]
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+Line 27:
+=== 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]]
 *[[KAGRA/Subgroups/VIS/Type-C/IMC_Suspension|IMC_suspension]]