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

Differences between revisions 102 and 133 (spanning 31 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

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

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
Magnet and standoff fixture jig

-  ⇤ ← Revision 102 as of 2016-02-29 13:23:43 → 
  Size: 250
  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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-== Type-C suspensions ==
+== 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.
-Line 4:
+Line 6:
-TAMA-type suspensions were used for iKAGRA.<<BR>>
 3 PO type; MC_i, MC_e, MC_o and 2 TM or RM type; ETMX, ETMY.
  
 Work log related to 2TM is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|iKAGRA_ETM]]
+ In 2017, 5 Type-C suspensions are installed 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 about 6cm.
 Other one is coming from CLIO, the size of the BS mirror was 4cm in thickness and 15cm in diameter.
-Line 9:
+Line 13:
+ 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
 *[[KAGRA/Subgroups/VIS/Type-C/Drawings|Drawings]]
 *Magnet and standoff fixture jig