• KAGRA
• Subgroups
• VIS
• VISMinutes20160603

VIS Meeting on 2016/6/3

2016/6/3 13:30 -

Room 210

Participants:Takahashi, Sato, Ishizaki, Mark, Hirata, Fujii, Fabian, Aso, Shoda, Akutsu

Overall Schedule

• The current overall schedule chart.

iKAGRA related activities

PR3

• PR3 post-run work status (Fujii)
  • TF and Q measuremnts were done. Now analyzing the data.

bKAGRA preparation

Important Issues

• New meeting format (Aso)
  • Each team will have individual meetings every week (F2F)
  • Each team will report the progress at the plenary VIS meeting.
    • Progress is checked against the schedule charts to be submitted by the team leaders by June 8th.
    • The schedule chart should be updated whenever necessary
  • After the progress check, important issues relevant to entire VIS team will be discussed
    • The topics will be picked by Aso
    • Everyone is welcome to suggest topics to Aso
  • Will start the new format from the next week.
• Site check for the preparation of Type-A installation (Aso)
  • Need check the transportation path of large items to the 2F of the end stations.
  • Takahashi, Ishizaki, Sato will come to Kamioka in the week of July 4th contingent on Miyoki-san's availability

• BS dummy mirror design (Mark)

  • Larger reflector will be prepared by Akutsu-kun (will get quotes soon)

• Accelerometers for IP
  

  • Is Geophone too noisy for innertial damping in Kamioka ? (Shoda) Slides

    • If the noise of the Geophones is as described in the slides, using Geophone should be fine.
    • However, the real noise of the Geophones is not well known. A measurement in Kamioka is necessary.

    • Shoda or Fujii will do the measurements along with the NIKHEF accelerometers sometime in June

  • NIKHEF accelerometers for BS
    • Test status (Fujii)
      • Resonant freq. and Q of the accelerometer were shifted from the previous measurements (still a mystery)
      • Did ring down measurements
      • Necessary parameters to convert the output to m/rtHz are obtained.
      • Still analyzing the data

      • Will present the results in the next VIS meeting

  • #Which accelerometers for SR ?
    • # Buy from NIKHEF ? How much is the cost ?
    • # Get the design from NIKHEF and produce them in Japan (ATC) ?

• Pre-isolator assembly and tests
  

  • Need to make a plan for the assembly of the SRC PI.
  • If possible assembly by Sato-san is better as he will do it for Type-A too.
  • Takahashi will make more detailed schedule for PI assemblyto see if Sato-san can do the SRC work.

• Dummy payload design for Type-A
  

  • SEO is now considering if we can use the iKAGRA ETMs for this or not.

• Bottom Filter LVDT -> To be discussed at the next meeting
  

  • Virgo people wants to produce ones for us.
  • Status ? (Raffaele)
• #Assembly frames
  • We need to combine things into one contract

  • Type-B assembly frame: order immediately (Takahashi)

Common Issues

• Wide OSEM production (Akutsu)

  • Flexible circuit status ?-> asked for quotation to the company (6/2).

Electronics

• List of requested electronics from VIS

  • The latest list

  • Need to add satellite boxes for IMMT (2 of them) to the list (Takahashi)

  • IMMT OSEM cables will be different from other OSEMs
• #Watch dog system (Tanaka)
  • photo-MOS relay switch resistance fluctuation
    • Noise requirement for the resistance fluctuation is necessary (Aso)
      • If we require the resistance noise to be smaller than DAC noise, the allowed fluctuation is 10^-7 Ohm/sqrt(Hz)@10Hz.
      • Asking Michimua-kun to calculate the requirements from the suspension response.

    • Tanaka measured the photo-MOS relay resistance fluctuation-> 37mOhm RMS upper limit

      • Will make spectrum of the resistance fluctuation.

Type-B

• KAGRA/Subgroups/VIS/TypeB

• Task list/schedule

• Type B Past Week Summary

  • Fabian worked on IM and dummy BS assembly: photos1, photos2

    • A hole in a picomotor holder was too small. ATC staff solved this isue quickly and Hirata-san cleaned the piece.
    • Some ballast discs for the dummy optic were dirty (seen by visual inspection). Hirata-san cleaned them.
    • Some arrows were cleaned from the mirrors for the dummy optic.
  • Hirata-san worked on checking Mirapro's assembly frame design - some minor issues with rail system found.
  • Hirata-san measured another filter.
  • Hirata-san washed a large batch of parts.
  • All parts for gluing of dummy BS are in hand. We arranged with Tatsumi-san to glue magnets at Mitaka on 6/6, glue flags at Kashiwa on 6/8, and inspect bonds and bring dummy BS back to Mitaka 6/13.

  • Mark worked on solutions to allow a larger mirror on dummy BS. After discussions with Simon and Akutsu-san we decided to go with a stainless steel plate solution. The gluing can go ahead and we can attach the plates later.

  • Mark worked on list of items for purchase in FY2016.
  • Mark worked on finding connectors for vacuum-compatible geophone adapters.

  • Mark worked more on E1504235 BS Assembly Procedure (Draft on OneDrive)

• Discussions

  • BS assembly frame contract: ordered. delivery date = July 8.

  • Review: send doodle poll (Mark)

Type A

• Task list (Takahashi) -> working on more detailed one.

• Clean booth design for 2F https://www.dropbox.com/s/8bi9ij91radmpt5/IXYV160512.pdf?dl=0

  • Sketch

  • Discussing with Miyoki-san (Takahashi, Aso)
• Prototype test of the EQ stop
  • Cleaned the ATC room for starting the test
• Frame lock: made a design change to make it stronger. Will order it next week.
• Sensors to monitor the release of the SFs from the EQ stop.

  • Updated Design

• Type-B Standard Filters preparation
  • Will start the measurement of the SFs for Type-A from the next week.
• The next Type-A meeting will be on 6/9.
• #Simultion (Okutomi)
• #Local sensors for BF

Type-Bp modification

• Modification for bKAGRA
  

  • Saito-san of ATC produced the first draft design -> now checking the design (Shoda)
    

  • First draft of the installation procedure & Checking if there is any conflict (Fujii)

  • Still waiting for the LVDT design from Virgo
  • Full CAD model of the original Type-Bp is almost done (Shoda)
• A/I till next week
  • First draft of the installation procedure (Fujii)
  • Full CAD model of the original Type-Bp and the new Type-Bp (Shoda)

Site work plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

BS crane will not be available: 13th -14th of June

Travel Plans

• Travel (Week of 6/6)
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Ohishi:
  • Sato:
• Travel (Week of 6/13):
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Ohishi:

Mark is away: July 8-20

Other

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

Next meeting

2016/6/10(Fri) 13:30 -

Next VIS F2F 6/17

Next next F2F 7/8