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| == iKAGRA ETM suspension Preparation; Current status == | == Type-C suspension == |
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| ==== Schedule ==== 12th- (2 weeks) Disassembling and Washing (favorable) 25th- (2 weeks) Assembling and Hanging 1th Feb- coil winding, transportation to the End, installation test 7th Feb- check 15th installation |
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. === iKAGRA === Five TAMA-type suspensions were used for 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(TestMass) or RM type; ETMX, ETMY with the mirror thickness of 6cm. |
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| ==== 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 ==== |
Work log about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]]. |
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| ==== coil driver ==== | === Toward bKAGRA === |
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| ==== cables ==== | [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Memo by Yamamoto-san]] |
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| ==== Assembling ==== On 21th, suspension frame, security frame, xy stages completed [Tomaru] |
=== bKAGRA === |
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| ==== Hanging ==== ==== Transfer Function Measurement ==== |
[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Type-C/Design2016|Design change for new suspensions]] |
Type-C suspension
- 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.
iKAGRA
Five TAMA-type suspensions were used for iKAGRA.
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(TestMass) or RM type; ETMX, ETMY with the mirror thickness of 6cm.Work log about 2 iKAGRA ETMs is here.
Toward bKAGRA