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Participants: Participants: Takahashi, Mark, Sato, Tanaka, Okutomi, Ishizaki, Aso, Enzo, Hirata, Akutsu, Shoda, Fujii, Raffaele
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Schedule Chart ([[https://www.dropbox.com/s/2q2elzj6s4lep6r/VIS%20Overall%20Schedule-20161014.pdf?dl=0|PDF]],[[https://www.dropbox.com/s/kwo9bxfb2711jkx/VIS%20Overall%20Schedule-20161014.mpp?dl=0|MPP]]) Schedule Chart ([[https://www.dropbox.com/s/2q2elzj6s4lep6r/VIS%20Overall%20Schedule-20161014.pdf?dl=0|PDF]],[[https://www.dropbox.com/s/kwo9bxfb2711jkx/VIS%20Overall%20Schedule-20161014.mpp?dl=0|MPP]]) '''To Be Updated'''
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 * Maraging wire: Hirata-san made 2D drawings. The wires will be ordered soon.  * Maraging wire: Hirata-san made 2D drawings. The wires will be ordered soon.    * Asking CRY to check the rod design for suspending the cryogenic payload. Set a deadline for the answer (Takahashi)
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    * Now the resonant frequency is around 0.6 Hz as opposed to the 0.4 Hz when it was tuned.
    * Continue the test hanging with this configuration, but check if 0.6 Hz is OK or not from the viewpoint of the vibration isolation performance with simulation.
    * Hirata-san will come to Kamioka from Nov. 7 to 11 to check the BF.
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 * Disassembly of PR3
  * To be done from Nov. 8 to 11. Enzo and Kasuya-san will join.
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 * Will show the design at the next AEL meeting.
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 * Any issue ?  * No issue
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  * [[KAGRA/Subgroups/VIS/VISMinutes20161028/SuspensionNamingConvention|Proposal]]   * We decided on the following convention
{{{
Type-A:
F0 - F1 - F2 - F3 - BF - PF - (MN) - IM - OP
Type-B:
F0 - F1 - BF - IM - OP
Type-Bp:
F1 - BF - IM - OP

}}}
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  * Will contact manufacturers of those tools if they have data on the operation shocks.
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 * Mon: BS test hanging
 * Tue: BS test hanging
 * Wed: BS test hanging
 * Thu: BS test hanging
 * Fri: BS test hanging		  * Mon:
 * Tue:
 * Wed:
 * Thu:
 * Fri:
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  * Shoda: 10/31 - 11/4? (PR3 disassemble)   * Shoda:
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  * Fujii: 8? (Fire drill)
  * Ishizaki: 7-8? (Extended chief meeting/Fire drill)
  * Hirata: 8? (Fire drill)		   * Fujii: ? (Fire drill)
  * Ishizaki:
  * Hirata: 8 - 11 (Fire drill/BS)
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  * Enzo: 8-11 (PR3 disassembly)
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Agenda/Minutes of the VIS Meeting on 2016/10/28

2016/10/28 13:30 - @Mitaka F2F.

Participants: Takahashi, Mark, Sato, Tanaka, Okutomi, Ishizaki, Aso, Enzo, Hirata, Akutsu, Shoda, Fujii, Raffaele

Progress report

Schedule Chart (PDF,MPP) To Be Updated

Type-A (Takahashi)

  • Minutes of Type-A Meeting

  • Pre-isolator: The top filter was mounted onto the IP. The shaft screw of motor was not matching to the slider for fishing rod. New shafts were ordered.
  • EQ stop, release sensor, dummy payload: Production is on going.
  • BF damper: Open bidding is on 9th November.
  • Maraging wire: Hirata-san made 2D drawings. The wires will be ordered soon.
    • Asking CRY to check the rod design for suspending the cryogenic payload. Set a deadline for the answer (Takahashi)
  • Installation: Making assembly drawings for the installation procedure document. The review is held on 4th November.

Type B (Mark)

  • Type B Past Week Summary
    • Fabian, Mark and Liu-kun did BS installation at Kamioka:
      • Debugged the issue with the BF keystone being tilted enough to cause rubbing on the yoke for the magnets. It was solved by moving the yoke ≈1 mm taking advantage of the oversized holes.
      • Measured the height of the payload as a function of trim mass. The BF spring seems to have a slightly lower load capacity and a rather higher spring constant than when it was remeasured by Hirata-san.
        • Now the resonant frequency is around 0.6 Hz as opposed to the 0.4 Hz when it was tuned.
        • Continue the test hanging with this configuration, but check if 0.6 Hz is OK or not from the viewpoint of the vibration isolation performance with simulation.
        • Hirata-san will come to Kamioka from Nov. 7 to 11 to check the BF.
      • Removed IM trim mass to set the average height of the keystone to the CAD value.
      • Moved IM trim mass around to set the pitch of the dummy BS and the roll of the IM.
      • Constructed the rest of the IRM around the IM.
    • Hirata-san
      • Prepared to get quotes for different types of "flying saucer" cable clamps (D1504530, D1605625, D1605734).
      • Finished BS assembly drawings (in-tank version) and sent to Saito-sensei).
      • Finished maraging rod 3D models and drawings (for Type A)
      • Modified top plate drawings for PRM inner frame.

Type-Bp (Shoda)

  • BFRM
    • Still waiting for ordering process.
  • Stab Flags
    • Waiting for the cost estimation.
  • Assembly frame
    • Asking cost estimate. Also asking to upgrade the assembly frame in the end of November.
  • Install procedure
    • pictures how to install whole suspension chain into the chamber is circulated.
      • We will ask the company about the accerelation of the crane, the chain block, and the lever block. According to their information, we will buy a chain block or a lever block and test them at Mitaka.
  • Flag removing jig.
    • The model is made by Shoda and approved by Hirose-san. Now the 2D drawing is being made.
  • Disassembly of PR3
    • To be done from Nov. 8 to 11. Enzo and Kasuya-san will join.

IMMT (Ohishi)

  • Put a report here

Watchdog system (Tanaka)

  • Conference material PCB Design Draft version.(Oct 21th 2016)PDF

  • Design and preparation(investigation of procurement) for production.PDF

  • Will show the design at the next AEL meeting.

Safety

  • No issue

Discussion

  • Suspension naming convention (Okutomi)
    • We decided on the following convention 

Type-A:
F0 - F1 - F2 - F3 - BF - PF - (MN) - IM - OP
Type-B:
F0 - F1 - BF - IM - OP
Type-Bp:
F1 - BF - IM - OP
  • Type-Bp installation tool: Lever block or Chain block (Shoda)
    • Will contact manufacturers of those tools if they have data on the operation shocks.

Site work plan for the next week

  • Mon:
  • Tue:
  • Wed:
  • Thu:
  • Fri:

Travel Plans

  • Travel (Week of 10/31):
    • Takahashi:
    • Shoda:
    • Mark:
    • Fabian:
    • Okutomi:
    • Fujii:
    • Ishizaki:
    • Hirata:
    • Sato:
    • Ohishi:
  • Travel (Week of 11/7):
    • Takahashi: 7-9 (Extended chief meeting/Fire drill/Accelerometer test)
    • Shoda: 7-11 (Extended chief meeting/Fire drill/PR3 disassemble)
    • Mark: 8 - 11 (Fire drill/BS)
    • Fabian:
    • Okutomi: 7 - 11 (Extended chief meeting/Fire drill/Accelerometer test/Realtime code)
    • Fujii: ? (Fire drill)
    • Ishizaki:
    • Hirata: 8 - 11 (Fire drill/BS)
    • Sato: 7-9 (Fire drill/Accelerometer test)
    • Enzo: 8-11 (PR3 disassembly)
    • Ohishi:

Next meeting

On 2016/11/4(Fri)

VIS F2F: Nov. 18, Dec. 2

KAGRA/Subgroups/VIS/VISMinutes20161028 (last edited 2016-10-28 17:55:11 by YoichiAso)