Differences between revisions 51 and 52
Revision 51 as of 2016-02-23 13:22:49
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Revision 52 as of 2016-02-23 13:23:39
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Editor: NaokoOhishi
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Deletions are marked like this. Additions are marked like this.
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 ==== Coil bobbin [Takahashi-san, Tatsumi-san] ==== ==== Coil bobbin [Takahashi-san, Tatsumi-san] ====
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 ==== Coil winding [Kuwahara-san, and Ushiba-san from U-Tokyo, Lee-san from Okazaki, and Ohishi](8th-16th Feb.) ==== ==== Coil winding [Kuwahara-san, and Ushiba-san from U-Tokyo, Lee-san from Okazaki, and Ohishi](8th-16th Feb.) ====
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 ==== D-sub connector plates [Takahashi-san] ==== ==== D-sub connector plates [Takahashi-san] ====
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 ==== 15pin-9pin changer for coil driver output [Ushiba-san, Ohishi] ====
 ==== Mirror container [Tatsumi-san] ====
==== 15pin-9pin changer for coil driver output [Ushiba-san, Ohishi] ====
==== Mirror container [Tatsumi-san] ====
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 ==== Attach magnets to dummy mirror (4 ; with the diameter of 2mm and the length of 5mm NdFeB magnets) [Tomaru, Yamamoto] ==== ==== Attach magnets to dummy mirror (4 ; with the diameter of 2mm and the length of 5mm NdFeB magnets) [Tomaru, Yamamoto] ====
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 ==== Screws in replace with Cu screws [Ohishi] ==== ==== Screws in replace with Cu screws [Ohishi] ====
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 ==== Pico-motors and PZTs ==== ==== Pico-motors and PZTs ====
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 ==== Coil drivers ==== ==== Coil drivers ====
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 ==== Cables ==== ==== Cables ====

iKAGRA ETM suspension preparation log

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

Disassembling in the ATC clean booth at 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]

  • 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.
  • Delivered to Kamioka on 4th Feb.

Coil winding [Kuwahara-san, and Ushiba-san from U-Tokyo, Lee-san from Okazaki, and Ohishi](8th-16th Feb.)

  • We used coil winding machine.
  • 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 connector plates [Takahashi-san]

  • attachment:D-sub_connector_plate.pdf

  • M3 holes were changed to phi3.1 holes. Yamamoto-san used drilling machine at Kamioka surface office.
  • One must be careful about the pillar position in order to attach this plate to the suspension.

15pin-9pin changer for coil driver output [Ushiba-san, Ohishi]

Mirror container [Tatsumi-san]

  • Some plates once used for transportation of MC mirrors were used
  • Two places of the container were cut to avoid standoffs.

Attach magnets to dummy mirror (4 ; with the diameter of 2mm and the length of 5mm NdFeB magnets) [Tomaru, Yamamoto]

  • We used CLIO magnet fixture jigs.

Screws in replace with Cu screws [Ohishi]

  • Replaced all Cu screws to stainless screws. Magnetism problem was indicated.

=== Some parts ====

Pico-motors and PZTs

  • We have 4 pico-motors except for x-axis (the direction of the light ) y, z, pitch, yaw

Coil drivers

  • 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

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.

=== Stages ====

  • Condensation
  • Vacuum compatibility?

Installation

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