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== iKAGRA ETM suspension preparation log == | == Type-C suspension == |
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==== Schedule ==== * 12th Jan- (2 weeks) Disassembling, Washing, and transportation * 25th Jan - (2 weeks) Assembling and Test Hanging with dummy mirror * 7th Feb- (1 week) coil winding, measurement of transfer function, transportation to the End area and installation test * 15th Feb- (1 week)installation |
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. === iKAGRA === 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. |
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==== Disassembling at Mitaka [Ohishi] ==== status: finished. (12th-19th) * 2 nuts stuck: solved by Hirata-san * A Cu screw stuck: solved by Hirata-san ==== Washing and transportation to Kamioka [Hirata-san] ==== status: finished. * 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 (by Takahashi-san) ==== New parts ==== status: finished. * coil bobbin [Takahashi-san] * coil winding [students of Ando-lab] * coil wires from the bobbin to Dsub connector were too short(20cm). The length of Must be 40cm or more. * At the end of coil wires, D-sub pins are swaged. We have run short of pins and waiting for delivery on 29th. * Peeling off the coating of wires longer than the length of those pins make the wire broken easily. * D-sub fixture plates [Takahashi-san] * M3 holes were drilled to phi3.2 holes. * mirror container [Tatsumi-san] * reference * magnets for dummy mirror (4 ; 2-phi-L-5mm Nd magnets) [Tomaru, Yamamoto] |
Work log about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]]. |
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* some screws in replace with Cu screws [Ohishi] [problem] replaced all Cu screws to stainless. Magnetism problem was indicated. ==== pico-motors and PZTs ==== We have 4 pico-motors 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 ==== |
=== Toward bKAGRA === |
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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/KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Memo by Yamamoto-san]] === bKAGRA === |
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==== Hanging ==== Hanging jig preparation ==== Transfer Function Measurement ==== ==== Transportation to the End ==== ==== Installation ==== [[attachment:Layout.png|{{attachment:Layout.png||width=600}}]]<<BR>> |
Type-C suspension
- 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.
iKAGRA
Five TAMA-type suspensions were used for iKAGRA.
3 PO type; MC_i, MC_e, MC_o and 2 TM or RM type; ETMX, ETMY.Work log about 2 iKAGRA ETMs is here.
Toward bKAGRA