|
Size: 2165
Comment:
|
Size: 980
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 1: | Line 1: |
| == iKAGRA ETM suspension preparation log == | == Type-C suspension == |
| Line 3: | Line 3: |
| ==== original 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 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 PickOff type; MC_i, MC_e, MC_o and 2 TM(TestMass) or RM type; ETMX, ETMY. |
| Line 9: | Line 11: |
| ==== Disassembling at Mitaka [Ohishi] ==== status: finished. (12th-19th) [problem] * 2 nuts stuck: solved by Hirata-san * A Cu screw stuck: solved by Hirata-san ==== Washing and transportation to Kamioka [Hirata-san] ==== status: finished. [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 (by Takahashi-san) ==== New parts ==== status: finished. * coil bobbin [Takahashi-san] * coil winding [students of Ando-lab] [problem] 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. [problem ]Peeling off the coating of wires longer than the length of those pins make the wire broken easily. * D-sub fixture plates [Takahashi-san] [problem] M3 holes were drilled to phi3.2 holes. * mirror container [Tatsumi-san] [problem] * magnets for dummy mirror (4 ; 2-phi-L-5mm Nd magnets) [Tomaru, Yamamoto] [] * 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 ==== |
Work log about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]]. |
| Line 43: | Line 13: |
| ==== Assembling [Tomaru, Ohishi, Yamamoto] ==== On 21th, suspension frame, security frame, xy stages completed |
=== Toward bKAGRA === [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Memo by Yamamoto-san]] === bKAGRA === |
| Line 46: | Line 19: |
| ==== Hanging ==== Hanging jig preparation ==== Transfer Function Measurement ==== ==== Transportation to the End ==== ==== Installation ==== |
[[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 PickOff type; MC_i, MC_e, MC_o and 2 TM(TestMass) or RM type; ETMX, ETMY.Work log about 2 iKAGRA ETMs is here.
Toward bKAGRA