Differences between revisions 13 and 14
⇤ ← Revision 13 as of 2018-10-09 10:17:44 →
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Editor: KojiNagano
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← Revision 14 as of 2018-10-10 10:22:41 → ⇥
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Editor: TomotadaAkutsu
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 * Akutsu-san will report  * See [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=6455|here]]

20181006

Today's activities

Workers: Akutsu, K. Nagano

BRT part installation

GPT part installation

  • We brought five QPD mechanical basis with plastic case which was used to store Dsub cables.
    • AFTER QPD INSTALLATION, WE SHOULD RETURN THE BOX TO 低音鏡機械室.
  • After BRT part was installed and aligned, we started to install GPT part (in-air part).
  • We found that damping of TMS-VIS was not necessary for GPT installation.

  • Following the design, we installed the beginning part of the green light path, two periscope mirrors, two steering mirrors, and one lenses.

    • First periscope mirror (GPM1): TFM-50C080532 (Opto-Sigma)

      • GPM1

    • Second periscope mirror (GPM2): TFM-50C080532 (Opto-Sigma)

      • GPM2

    • First steering mirror (GST1): TFM-50C080532 (Opto-Sigma)

      • GST1

    • Second steering mirror (GST2): TFM-50C080532 (Opto-Sigma)

      • GST2

    • First lens (GLNS1, f=500): LA1380-A-ML (Thorlabs)

      • GLNS1

  • At first, all mirrors were installed. Then the lens was installed not to change beam position.
  • The lens position, i.e. beam profile, was not tuned since the tuning was not so effective without arm cavity locked.
  • In the end of today's work, we installed DC PD (PDA100A2, Thorlabs) after GST2 temporarily. The gain was set to 0 dB.

    • GPD

  • After all, GPT part looks like below.

    • overview

  • The signal was checked like this.

    • Enomoto-kun kindly built model (k1aostmsx) and restarted k1dc0 to register channel for IR and Green DC PD befor the above klog6452.

Next plan

  • Align and balance the BRT and the TMS-VIS.
  • Configure the digital models properly.
  • Detach the remaining white tapes just before closing the chamber; be noted that there are white tapes on the PEEK connectors at the inside of the flanges.
  • Torque completely the bolts which are fixing the upper and the lower base plates.
  • Insert metal gaskets before torquing the ICF203 flanges with Dsub connectors.
  • Install optics after GBS1
  • Install gigE camera
  • Modify MEDM screen
    • Add DC PD and so on.

  • Cable Dsub 15pin for TMS-VIS OpLev.

  • Modify cabling for DC PD.
  • Return plastic box.
  • Install rails in digital rack.
    • They may be necessary under LVDT distributor, geophone distributor, and WHT board.
    • Nagano is not sure it is necessary under HP coil driver.
  • Consider how to cable Dsub cables to QPD.

Wanted!

  • A document for learning how to release or fix the suspended tables (by Uraguchi?).
  • FIVE QPD electronics boards

KAGRA/Subgroups/AOS/TMSX_O3/2018-10-06 (last edited 2018-10-10 10:22:41 by TomotadaAkutsu)