Differences between revisions 10 and 11
Revision 10 as of 2016-02-12 17:44:47
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Editor: YoichiAso
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Revision 11 as of 2016-02-13 06:22:47
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Editor: YoichiAso
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Deletions are marked like this. Additions are marked like this.
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   * Cable ties are not yet delivered -> check it (Takahashi)    * Cable ties are not yet delivered -> check the delivery date (Takahashi)
Line 83: Line 83:
   * Currently it is rotated by 0.65deg.    * Currently the mirror is rotated by 0.65deg (measured at the time of the test hanging).
   * This is well within the actuation range of the traverser. -> Will not make any further adjustment.
Line 122: Line 123:
 * Need to make Guradian script for PR3 (Shoda, Fujii, Okutomi)  * Need to make Guradian script for PR3. Shoda + Fujii and Okutomi will write one after the mechanical installation is finished.
Line 158: Line 159:
   * Will talk to Fukushima-san again (Hirata)
   * Wider cuts will break the horizontal balance. Need to check how much compensation mass is reduced (Hirata) -> 2mm
   * Two concerns
    * The rework may bend the wing shaped parts.
    * The P.C.D. of the new screw holes may not coincide exactly with the other existing holes
   * Consult with Fukushima-san again. Takahashi will contact Fukushima-san
   * Do we need to widen the slits for PRC RMs ? -> Depends on how difficult it is to rework the RM.
   * Wider cuts will break the horizontal balance. Need to check how much compensation mass is reduced (Hirata) -> 2mm reduction will be necessary. We can do this.
Line 161: Line 166:
  * Shorter flag is desirable ?

VIS Meeting on 2016/2/12

2015/2/12 13:30 -15:00

Kamioka TV conference room + SeeVogh

Participants:Takahashi, Mark, Hirata, Fabian, Shoda, Fujii, Aso, Sekiguchi, Akutsu, Okutomi

Schedule

  • Schedule status (Aso) (Chart)

PR3

  • PR3 Installation Status (Takahashi)
    • Wire breaker groove problem
      • Wrong surface was glued on the mirror side. So no groove is present where the wires touch.
      • Put alminum foil between the prism and the wires
    • Current status (http://klog.icrr.u-tokyo.ac.jp/osl/?r=756)

      • IM and the bottom filter is connected.
      • Adjusting the weight of the IM
    • #Traverser repair: Repair of the broken ones at Mitaka -> Uraguchi-san is working on it.

    • #Screws to fix the front and back rings the RM were too long, or the tapping in the holes were too short. Couldn't use M5x40. Ordered M5x35 with vent holes. -> Delivered. Remember to replace them

  • The frame for the clean bag is bent.
  • Crane will be not available on 2/25 for the crane upgrade to remote control. We need to coordinate with Uchiyama-san if we want to do the vacuum installation on 25th.

Plan for the next week

  • Mon: IM hanging
  • Tue: IMRM hanging
  • Wed: IM alignment
  • Thu: OSEM setup
  • Fri:

iKAGRA ETM suspension

  • Assembly of the suspension (Ohishi)
  • Missing parts (Tatsumi, Takahashi)
    • Insulation tubes for picomotor connectors
      • Tubes were delivered on Wed.
      • Cable ties are not yet delivered -> check the delivery date (Takahashi)

  • Suspension Test (Ohishi)
  • Coil winding (Takahashi)
    • Made 13 coils in total.
    • Need to send 3 bobins to the coil winding company
  • TAMA PRM transportation (Tatsumi) -> done today.

Plan for the next week

Travel Plans

  • Travel (Week of 2/15)
    • Takahashi:Mon-Thu

    • Shoda:Mon-Thu

    • Mark:
    • Fabian:
    • Okutomi:Mon-Thu

    • Fujii:Mon-Thu

    • Ishizaki:
    • Hirata:
    • Ohishi:
    • Sekiguchi: Mon-Thu

VIS F2F 2/19

KAGRA F2F 2/21 - 23

  • Travel (Week of 2/22)
    • Takahashi:Wed - Thu (Fri: Akeno for the acceptance of IP from NIKHEF)

    • Shoda:Wed - Fri

    • Mark:
    • Fabian:
    • Okutomi:Wed - Fri

    • Fujii:Wed - Fri

    • Ishizaki:
    • Hirata:
    • Ohishi:

Other Mechanical Issues

  • Rotation angle of the PR3 mirror
    • 0.786deg counter clockwise from the line connecting the centers of the PR3 and BS chambers.
    • 0.619deg counter clockwise with respect to the chamber (schematic)

      • Currently the mirror is rotated by 0.65deg (measured at the time of the test hanging).
      • This is well within the actuation range of the traverser. -> Will not make any further adjustment.

  • #Wire winches
    • Now in the ATC clean room.
    • Asked Ikenue-san to repair it (Takahashi)
  • #Clean work procedure
    • Will be discussed at F2F.
  • #BF Optimal Weight (Takahashi)
    • #Balast masses: Delivered to Mitaka. Will send them to Kamioka (Hirata)
  • #IM wire clamps
    • #Need to send the wire clamps used for the test hanging to I-ject: it was sent to I-ject (Takahashi)
  • #Traverser actuation check (Shoda)
  • #Wire cleaning (Hirata)
    • Hirata will order 20m more wires. -> Delivered. Will wipe in the next week. -> Finished. Will send to Kamioka soon.

    • Will wash Tungsten wire delivery status -> Delivered. Will wipe in the next week -> Finished. Will send to Kamioka soon.

  • #Production of additional PR winches (Akutsu)
    • Shipping status (Takahashi, Hirata) -> Wrapped. Will be shipped with IP in the next week.

  • #OSEM assembly status (Akutsu)
  • #List of what should be changed for PR3 hanging
  • #Missing items(to be purchased soon)
    • #Traverser motor driver (Shoda) -> Will discuss Uraguchi-san. Need a box for stepping motor driver. -> These are for PR2. Will be ordered sometime.

Electronics

  • What are necessary in the next few weeks ?
    • Nothing
  • Electronics diagram and review
  • Need to make Guradian script for PR3. Shoda + Fujii and Okutomi will write one after the mechanical installation is finished.
  • Watch dog system (Tanaka)
  • #LVDT distributor connector problem
    • Miyakawa-san circulated a design of the conversion cable (D9-D15): drawing

  • #Digital System (Okutomi, Fujii)
  • #Cable status (Takahashi)
    • Need to send more PTFE cable to finish the remaining two -> Will do it in the next week

    • Need to send the cables used for the test hanging once it is finished. -> Will send them once the test hanging is disassembled.

  • #Cable check
    • Liu-kun Zhao-kun finished checking all the cables. They found another broken cable.
    • Will send the broken cables together with the other cable related items (Takahashi).

bKAGRA preparation

  • Three big categories of the tasks
    • Type-A: Leader = Takahashi: Task list, team members
    • Type-B (BS and SRC): Leader = Mark: Task list, team members
    • Type-Bp modification: Continue discussion (Aso, Raffaele)

Common Issues

Type-B

  • Task listKAGRA/Subgroups/VIS/TypeB/TaskList

    • Kick off meeting within February (Mark)
  • BS prism preparation (Mark)
    • 5mm prism drawing

    • Confirmed with Hirata-san that BS can use same 5 mm prism as SR (grooves, wire clearance all OK).
    • Confirmed with Tatsumi-san that not a big deal to use smaller BS prism as long as secondary position not changed.
    • Submitted 5 mm prism drawing to company that did LIGO HSTS prism (except grooves), waiting on response.
    • Second company that did LIGO groove cutting not interested in quoting - exploring other US companies.
    • Should contact Shinko-sha again (Takahashi)
  • Can we make SR wire breakers bigger ?
    • Check what happens if we widen the slit by 3.75mm and make a new M5 (Hirata) -> Result

      • Two concerns
        • The rework may bend the wing shaped parts.
        • The P.C.D. of the new screw holes may not coincide exactly with the other existing holes
      • Consult with Fukushima-san again. Takahashi will contact Fukushima-san
      • Do we need to widen the slits for PRC RMs ? -> Depends on how difficult it is to rework the RM.

      • Wider cuts will break the horizontal balance. Need to check how much compensation mass is reduced (Hirata) -> 2mm reduction will be necessary. We can do this.

  • Flag design (Mark)
    • Shorter flag is desirable ?
    • Mark will sort out the ideas and organize a specialized meeting.-> will present an updated version in the next meeting.

  • IP base clamp (Fabian): Picture -> Reduce the number of clamps-> Hirata-san finished 2D drawings. Trying to get quotation now.

  • Bread board spring (Takahashi): Hirata-san is getting quotations.
  • #BS Assembly Frame Design (Aso, Hirata)
  • #BS gluing jigs (Tatsumi)
  • #Not enough crane height problem (Hirata, Saito)
  • #BS clean bag (Aso)

Type A

  • Task list (Takahashi)

  • #Type-A Filters Optimal Load Measurements
    • #Takahashi will make a plan for the optimal load check and ask ATC.-> Check two filters per month from April 2016. -> Will be presented to the ATC steering committee.

    • #How to manufacture the long maraging wires ?
      • One prototype was machined by Ojima
      • Aoshima can do the heat treatment for the long rod. Will ask them soon (Takahashi) -> Still waiting for a quotation.

      • How to test it ?
        • We can use the prototype assembly frame in TAMA.

Type-Bp modification

  • PRM traverser
    • Postpone the production to the next FY until we know the details of the modification.
    • Tell Uraguchi-san about the above plan (Takahashi) -> done

  • #PR2 Wire breaker problem
    • Prism removal from PR2 (Hirose, Mark)
      • Not yet ready

Other

  • Safety
    • No incident
  • #GAS blade inspection by Virgo (Takahashi)
    • Shipped the blades. Will get results in 1-2 months.

Next meeting

2015/2/19 (Fri) 13:30 - @ Mitaka

KAGRA/Subgroups/VIS/VISMinutes20160212 (last edited 2016-02-13 06:23:04 by YoichiAso)