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| == iKAGRA ETM suspension preparation log == | == Type-C suspensions == |
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| ==== Schedule ==== * 12th Jan- (2 weeks) Disassembling, Washing, and transportation * 25th Jan - (2 weeks) Assembling and Test Hanging with an Al 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 means double pendulums, some of which were once used for TAMA300. === 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 ATC Mitaka [Ohishi] (12th-19th Jan.) ==== * Two nuts stuck. Hirata-san removed them. * A Cu screw stuck. Hirata-san removed it. ==== Washing and transportation to Kamioka [Hirata-san] ==== * The ultra sonic washer at ATC was broken on 20th Jan. A new washer was ordered on 22th(Fri) and arrived at Mitaka on 25th(Mon). * Eight screws for adjusting the IM holding plate was dirty. Takahashi-san ordered similar screws. ==== New parts ==== * Coil bobbin [Takahashi-san, Tatsumi-san] [[http://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0047/T1604741/001/Coil_Preparation_2016.pdf|coil bobbin]] * The outer diameter of the coil has been changed from 14.2mm to 14.5mm. * Due to this change, the number of winding becomes 39 from 41. * Coil winding [Kuwahara-san, and Ushiba-san from U-Tokyo] * Lead wires from the bobbin to Dsub connector were too short (20cm). The length must be 40cm or more. * At the end of the lead wires, D-sub pins are swaged. We have run short of pins and waiting for delivery on 29th Feb(Mon). * 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] [[attachment:MirrorContainer.pdf|{{attachment:MirrorContainer.pdf||width=600}}]]<<BR>> * 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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| * 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 ==== ==== Assembling [Tomaru-san, Ohishi, Yamamoto-san] ==== On 21th, suspension frame, security frame, xy stages completed |
=== toward bKAGRA === === bKAGRA === |
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| ==== Hanging ==== Hanging jig preparation ==== Transfer Function Measurement ==== ==== Transportation to the End [Prof. Kimura, Sawada-san, Tomaru-san(KEK),]==== KEK ==== Mirrors ==== Two TAMA PRM mirrors (with about 50% and 90% reflectivities each, resultant contrast becomes 96%) were delivered to Kamioka on 12th Feb. ==== Installation ==== |
Type-C suspensions
- Type-C suspension means double pendulums, some of which were once used for TAMA300.
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