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

Differences between revisions 112 and 152 (spanning 40 versions)

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.
Note by K. Arai(2014)

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.
Memo by Yamamoto-san
IMMT Preparation
Design change for new suspensions(by K. Arai)

Drawings

OSEM
Drawings
Magnet and standoff fixture jig
IMC_suspension

-  ⇤ ← Revision 112 as of 2016-03-01 12:12:42 → 
  Size: 657
  Editor: NaokoOhishi
  Comment:
+   ← Revision 152 as of 2019-03-15 11:24:04 → ⇥
  Size: 1619
  Editor: NaokoOhishi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-== Type-C suspension ==
+== Type-C (TAMA) suspension ==
 Line 3:
- Type-C suspension is relatively small double pendulum. Among the big suspensions used in KAGRA, type-C is the smallest. Some of them were once used for TAMA300, originally designed by K. Arai in 1990s. So "TAMA-type suspension" is Type-C 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)]]
-Line 7:
+Line 9:
- Five 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 about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]].
+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.
 Line 12:
-=== Toward bKAGRA ===
+==== 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 [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]].
-Line 14:
+Line 20:
- [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Memo by Yamamoto-san]]
+ * ETM Transfer function
 * long term drift
-Line 17:
+Line 24:
+ *Two suspensions used at the X/Y ends, are used as IMMT1 and IMMT2 for bKAGRA.
 [[KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Memo by Yamamoto-san]]
 *[[KAGRA/Subgroups/VIS/Type-C/IMMT|IMMT Preparation]]
-Line 18:
+Line 29:
+ *[[KAGRA/Subgroups/VIS/Type-C/Design2016|Design change for new suspensions(by K. Arai)]]

=== Drawings ===
 *[[KAGRA/Subgroups/VIS/Type-C/OSEM|OSEM]]
 *[[KAGRA/Subgroups/VIS/Type-C/Drawings|Drawings]]
 *Magnet and standoff fixture jig
 *[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/IMC%20Suspension|IMC_suspension]]