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Revision 10 as of 2016-01-22 15:36:59
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Editor: NaokoOhishi
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Revision 153 as of 2019-03-15 11:25:08
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Editor: NaokoOhishi
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Deletions are marked like this. Additions are marked like this.
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== iKAGRA ETM suspension preparation; current status == = Type-C (TAMA) suspension =
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==== Schedule ====
 * 12th Jan- (2 weeks) Disassembling and Washing (favorable)
 * 25th Jan - (2 weeks) Assembling and Hanging with dummy mirror
 * 1th Feb- (1 week) coil winding,
 * 7th Feb- (1 week) check and transportation to the End and installation test
 * 15th Feb- installation
  
==== Disassembling at Mitaka[Ohishi] ====
  finished. (12th-19th)
 [problem]
  * 2 nuts stuck: solved by Hirata-san
  * A Cu screw stuck: solved by Hirata-san
==== Washing [Hirata-san] ====
   most of the parts were washed.
 [problem]
  * ultra sonic washer broken 20th
  ordered on 22th(Fri) will be arrive at Mitaka on 26th(Tue)
  * 8 screws for adjusting the IM holding plate was dirty
   Solution: order new screws (not ordered yet)
==== Missing parts ====
 * coil bobbin [Takahashi-san]
 * coil winding [students of Ando-lab]
 * D-sub fixture plates [Takahashi-san]
 * mirror container [Tatsumi-san]
 * magnets for dummy mirror (4 ; 2-phi-L-5mm Nd magnets) [Ohishi]
 * some screws in replace with Cu screws [Ohishi]
  
==== pico-motors and PZTs ====
 We have 4 pico motor except for x-axis (the direction of the light )
 y, z, pitch, yaw
==== coil driver ====
 We use KAGRA coil driver; we need to cheek its performance.
==== cables ====
 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.
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==== Assembling [Tomaru, Ohishi, Yamamoto]====
 On 21th, suspension frame, security frame, xy stages completed
 *[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/IMC%20Suspension|Note by K. Arai(2014)]]

== iKAGRA ==

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.

=== 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.

=== Temporary mirrors ===
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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==== Hanging ====
 Hanging jig preparation
Work log about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]].
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==== Transfer Function Measurement ====  * ETM Transfer function
 * long term drift

=== bKAGRA ===

 *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]]
 
 *[[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]]

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.

Temporary mirrors

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

Drawings

KAGRA/Subgroups/VIS/Type-C (last edited 2020-04-30 12:05:11 by KousekiMiyo)