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Date : 13:00- Date : 13:00-14:00
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Participants:  Participants: Takahashi, Ikeda, Aso, Uchiyama, Ushiba, Kimura, Sato, Tomaru
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 * IX: Oplev setting is on going. Final setting of height was applied on 4/26. One ACC was tuned on 4/24.  * IX: Final setting of height was applied on 4/26. Oplev for angle has been adjusted. To adjust length, it is necessary to damp the filter chain. One ACC was tuned on 4/24.
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 * EX: Height adjustment is on going ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16613|Status]]).  * EX: Height adjustment is on going ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16613|Status]]). The measured height of ETMX (-19.5mm) is too low. It will be remeasured on 5/3.
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 * Acceptance check: Meeting (workshop) was set every Friday to make the acceptance check document.  * Acceptance check: Group work is set every Friday to make the acceptance check document.
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14:00- 14:00-14:30
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Participants: Participants: Takahashi,Miyo,Terrence, Sugiyama, Fabian, Washimi, Sato, Aso
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 * Type-B team:  * Type-B team: PRM
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 * Final setting of the height was applied in IX.
 * The height adjustment is on going in EX.
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==== PR2 ====
On Monday:

 * We measured the size of the buoyancy effect using stored data of the LVDT and a varnier calliper: '''2.3 mm. It's too large to believe it.''' There must be something wrong in the measurement.
 * We moved the SF FR stepper motor physical stop screws up in order to increase the''' FR range: 5.54 mm'''. We also set new software limits.
 * We determined the '''height of the mirror to be -5 mm''' when having the
  * BF at the setpoint and
  * SF FR roughly at midrange.
 * The temperature was 23.9 degrees.
 * We installed the thermistor.

On Tuesday

 * We set the SF keystone to nominal height, BF at the setpoint and the mirror was 6.5 mm below nominal height.
  * The security structure is 3 mm below its nominal.
  * The RM was 2.5 mm below nominal with respect to the security structure.
  * We can only survey the +X side of the RM becuase the markings were made on the wrong side of the chamber, so checking roll was important.
 * We also measured the position of the SF keystone when the LVDT readout was zero: 0.6 mm.
 * Temperature decreased to 23.4 degrees.

On Wednesday

 * '''After checking roll, we corrected the height of the mirror to be 4.7 mm'''.
 * '''While keeping the BF at the setpoint we moved the SF FR up until the mirror was at the correct height.'''
 * We measured transfer functions for the BF and SF to check whether the resonance frequency had changed: it didn't.
  * The one for the BF was exactly the same as the reference.
  * The one for the SF showed a smaller amplitude.
 * The changed in amplitude is likely due to the SF LVDT being out of linear range. We will try to fix it by tuning the resistences in the LVDT card.

==== PRM ====
 * Hirata-san and Tomaru-san made height markings for setting the mirror height.
 * Hirata-san and Ikeda-san checked that the traverser is working properly.
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Agenda/Minutes

Zoom Meeting


CRY+VIS Interface Meeting

Date : 13:00-14:00

Participants: Takahashi, Ikeda, Aso, Uchiyama, Ushiba, Kimura, Sato, Tomaru

Post O3 Upgrade portal

Schedule

  • IX: Final setting of height was applied on 4/26. Oplev for angle has been adjusted. To adjust length, it is necessary to damp the filter chain. One ACC was tuned on 4/24.
  • IY: Remedy of the pre-isolator was postponed.
  • EX: Height adjustment is on going (Status). The measured height of ETMX (-19.5mm) is too low. It will be remeasured on 5/3.

  • EY: Installation of the tower will be restarted on 5/11. Removing of the maraging rod is necessary.

Status

  • Corrugate tube fixing jig: Replaced for IXV on 4/28.
  • Commissioning in air: From mid. May for IX.
  • Commissioning in vacuum:
  • Acceptance check: Group work is set every Friday to make the acceptance check document.
  • PF actuator: After SC.
  • Jig for FC painting:
  • Overall commissioning:
  • Procedure of TM height setting: Plan for EX.
  • Box frame Box frame deformation.pdf

Discussion


VIS Meeting

14:00-14:30

Participants: Takahashi,Miyo,Terrence, Sugiyama, Fabian, Washimi, Sato, Aso

Schedule

See Schedule

  • Type-A team: IXV 5/10, EYV 5/11-13
  • Type-B team: PRM

Milestone

  • IMC suspensions are ready in air [40] will finish 2011/04/21.

  • PRs are ready in air [643] will finish 2011/07/09.

  • ETMX is ready in air [656] will finish 2021/08/25.

  • ITMX is ready in air [657] will finish 2021/08/31.

  • ETMY is ready in air [658] will finish 2021/09/16.

  • ITMY is ready in air [659] will finish 2021/11/08.

  • BS is ready in air [691] will finish 2011/11/24.

  • SRs are ready in air [663] will finish 2011/12/20.

  • Output suspensions are ready in air [695] will finish 2011/12/21.

  • TMSY is ready in air [708] will finish 2011/??/??.

  • TMSX is ready in air [684] will finish 2011/??/??.

2021/03/29 updated

Klog

EX

  • (!) 16535 Height adjustment of ETMX , ryutaro.takahashi

General

  • 16506 Deleted unnecessary processes from VIS model file. , satoru.ikeda

IX

  • 16421 Height adjustment of ITMX , ryutaro.takahashi

    • 16499 Comment , ryutaro.takahashi

    • 16519 Comment , ryutaro.takahashi

MCE

  • 16512 MCe oplev characterization , takaaki.yokozawa

    • 16525 Comment , takaaki.yokozawa

    • (!) 16522 Comment , tomotada.akutsu

MCF

  • 16498 Type-C simulation model , yoichi.aso

  • 16501 Oplev calibration MCo , takaaki.yokozawa

  • 16500 Characterization of optical lever MCi , takaaki.yokozawa

  • (!) 16537 MCo suspension strange , tomotada.akutsu

  • 16157 Investigation of IMC suspensions , ryutaro.takahashi

    • 16513 Comment , kouseki.miyo

PR3

  • 16520 Thermistor installation , fabian.arellano

  • 16521 Setting the mirror to nominal height , fabian.arellano

  • 16348 Tightening the locating clamps for the piano wire. , fabian.arellano

    • 16502 Comment , fabian.arellano

  • 16520 Thermistor installation , fabian.arellano

    • (!) 16533 Comment , fabian.arellano

  • 16521 Setting the mirror to nominal height , fabian.arellano

    • (!) 16532 Comment , shinji.miyoki

    • (!) 16529 Comment , fabian.arellano

PRM

  • 16518 PRM BF-LVDT replacement , yoichi.aso

    • (!) 16534 Comment , yoichi.aso

SR2

  • 16509 Lowering the pre-isolator , fabian.arellano

This is generated by python script in /users/Miyo/dropbox/Script/scrapping/main.py.

Summary Report

TypeA

  • Final setting of the height was applied in IX.
  • The height adjustment is on going in EX.

TypeB

Type-Bp

PR2

On Monday:

  • We measured the size of the buoyancy effect using stored data of the LVDT and a varnier calliper: 2.3 mm. It's too large to believe it. There must be something wrong in the measurement.

  • We moved the SF FR stepper motor physical stop screws up in order to increase the FR range: 5.54 mm. We also set new software limits.

  • We determined the height of the mirror to be -5 mm when having the

    • BF at the setpoint and
    • SF FR roughly at midrange.
  • The temperature was 23.9 degrees.
  • We installed the thermistor.

On Tuesday

  • We set the SF keystone to nominal height, BF at the setpoint and the mirror was 6.5 mm below nominal height.
    • The security structure is 3 mm below its nominal.
    • The RM was 2.5 mm below nominal with respect to the security structure.
    • We can only survey the +X side of the RM becuase the markings were made on the wrong side of the chamber, so checking roll was important.
  • We also measured the position of the SF keystone when the LVDT readout was zero: 0.6 mm.
  • Temperature decreased to 23.4 degrees.

On Wednesday

  • After checking roll, we corrected the height of the mirror to be 4.7 mm.

  • While keeping the BF at the setpoint we moved the SF FR up until the mirror was at the correct height.

  • We measured transfer functions for the BF and SF to check whether the resonance frequency had changed: it didn't.
    • The one for the BF was exactly the same as the reference.
    • The one for the SF showed a smaller amplitude.
  • The changed in amplitude is likely due to the SF LVDT being out of linear range. We will try to fix it by tuning the resistences in the LVDT card.

PRM

  • Hirata-san and Tomaru-san made height markings for setting the mirror height.
  • Hirata-san and Ikeda-san checked that the traverser is working properly.

TypeC

Electronics

Control

Safety

Discussion

Travel Plans

The week from 5/3

  • Hirata: 5/6-9

The week from 5/10

  • Takahashi: 5/10-14
  • Sato: 5/10-14
  • Hirata: 5/10-14
  • Yano: 5/10-14

Next meeting

  • 2021/5/14(FRI)

KAGRA/Subgroups/VIS/VISMinutes20210430 (last edited 2021-04-30 14:39:35 by RyutaroTakahashi)