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Participants:  Participants:
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 * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]]
 * VIS team plan to test the ribbon heater on the cross tube in IX or IY just before the vent of chambers.
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 * Preparation work with suspensions:
  * In BS, SR2 and SRM GAS filters I offloaded coil-maget actuation onto fishing rods (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15027|15027]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15039|15039]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15042|15042]]).
  * In BS F1 I was able to move the keystone down to 230 um. Before the lowest the FR would allow was 488 um. I changed the setpoint accordingly and updated BURT and SDF files (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15027|15027]]).
  * The temperature was relatively high at the moment (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15040|15040]]). I told Moyoki-san and he installed coolers (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15043|15043]]). The temperature has been dropping since then (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15052|15052]]).
  * I'll offload again once the DC actuation in GAS filters stops drifting.
  * I'll measure IP resonant frequencies again.
  * I told Takahashi-san about the yokes in BS IP coil-magnet actuators. They require cleaning and nickel coating.
 * I went to the tunnel with Miyo-kun and cheked the holders for the gauge dials. We'll need to but longer rods. I'll let Takahashi-san know.
 * Highlight in documentation:
  * Shoda-san, Takahashi-san, Hirata-san and Miyo-kun gave me feedback about the document. Thank you very much! B)
  * An overall BS procedure is now readable.
  * Hirata-san checked the section about the Lower Breadboard (LBB) and provided a picture for SR3 section.
  * I added a secton on how to set the fishing rods to mid-range position.
   * During installation we measured the total range of the motor in number of steps.
   * For the FRs that are at the end of their ranges we just have to move them by half of the total range.
  * I added a section about monitoring the IPs during venting. I got feedback and updated the document.
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  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11520|Limit switch connecting guide]] <--- New   * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11520|Limit switch connecting guide]]
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  * [[https://paper.dropbox.com/doc/Plan-for-cleaning-the-clean-booth--A73isqnLjN32leQb4nFiuN~BAg-KVEbnCCBASYy4ea78HBUH|Cleaning procedure]].
  * When you make inventories, indicate [[https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0119/E2011960/002/KAGRA_Cleanbooth_Segment_Name.pdf|the segment name]].
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 * The week from 9/28
  * Takahashi: 9/30-10/2
  * Sato: 9/30-10/2
  * Hirata: 9/30-10/2
 * The week from 10/5
  * Takahashi: 10/5-9
  * Sato: 10/5-9
  * Hirata: 10/5-9		 The week from 9/28

 * Takahashi: 9/30-10/2
 * Sato: 9/30-10/2
 * Hirata: 9/30-10/2

The week from 10/5

 * Takahashi: 10/5-9
 * Sato: 10/5-9
 * Hirata: 10/5-9

Agenda/Minutes of the VIS Meeting on 2020/9/18

2020/9/18 13:30 -

Zoom Meeting

Participants:

Interface between VIS and CRY

  • Interface meeting was set to discuss about the integrated CAD model, the link between Cryo-payload and Type-A tower, the schedule, and so on. Mainly in Japanese for the engineers.

  • Post O3 Upgrade portal

  • VIS team plan to test the ribbon heater on the cross tube in IX or IY just before the vent of chambers.

  • Acceptance Test (Wiki page, Inspection document style).

Progress report

General

Type-A

Type B

  • Preparation work with suspensions:

    • In BS, SR2 and SRM GAS filters I offloaded coil-maget actuation onto fishing rods (klog 15027, 15039, 15042).

    • In BS F1 I was able to move the keystone down to 230 um. Before the lowest the FR would allow was 488 um. I changed the setpoint accordingly and updated BURT and SDF files (klog 15027).

    • The temperature was relatively high at the moment (klog 15040). I told Moyoki-san and he installed coolers (klog 15043). The temperature has been dropping since then (klog 15052).

    • I'll offload again once the DC actuation in GAS filters stops drifting.
    • I'll measure IP resonant frequencies again.
    • I told Takahashi-san about the yokes in BS IP coil-magnet actuators. They require cleaning and nickel coating.
  • I went to the tunnel with Miyo-kun and cheked the holders for the gauge dials. We'll need to but longer rods. I'll let Takahashi-san know.
  • Highlight in documentation:

    • Shoda-san, Takahashi-san, Hirata-san and Miyo-kun gave me feedback about the document. Thank you very much! B)

    • An overall BS procedure is now readable.
    • Hirata-san checked the section about the Lower Breadboard (LBB) and provided a picture for SR3 section.
    • I added a secton on how to set the fishing rods to mid-range position.
      • During installation we measured the total range of the motor in number of steps.
      • For the FRs that are at the end of their ranges we just have to move them by half of the total range.
    • I added a section about monitoring the IPs during venting. I got feedback and updated the document.

Type-Bp

Type-C

Controls

Electronics

Towards O4

cf. Post Obs. task (Request), Task for O3c (Plan, Sheet), Task towards O4 (List)

Safety

Discussion

Travel Plans

The week from 9/28

  • Takahashi: 9/30-10/2
  • Sato: 9/30-10/2
  • Hirata: 9/30-10/2

The week from 10/5

  • Takahashi: 10/5-9
  • Sato: 10/5-9
  • Hirata: 10/5-9

Next meeting

  • On 2020/9/25(Fri)

KAGRA/Subgroups/VIS/VISMinutes20200918 (last edited 2020-09-18 15:00:09 by RyutaroTakahashi)