Agenda/Minutes of the VIS Meeting on 2017/10/6

2017/10/6 13:30 -

Participants:

Progress report

Schedule Chart

Type-A & Bp : (PDF,MPP)

Type-B: (PDF,MPP)

• Type-A:
• Type-B:
• Type-Bp:

Type-A (Takahashi)

Past week report

[X-end]

2nd(Mon)

• Installed the pre-isolator into the top chamber.
• Hooked the wire to the keystone in TF.
• Removed the Wire holder.

3rd(Tue)

• Installed two cross tubes to extend the ports for feedthrough.
• Connected the cables to the feedthroughs.
• Released the keystone in TF. All filter chain was suspended successfully.
• Assembled the horizontal geophone.

5th(Thu)

• The flange to partition the chamber to the corrugate tube and the cryostat was installed.

6th(Fri)

• Adjusted the weight of DP.
• Mounted the ballast rings on the IP.

[Y-end]

4th(Wed)

• Opened the top chamber.
• Locked the IP.
• Checked the motion of FRs.
• Found a mistake on the keystone of TF. It was locked.
• The IRM of cryo-payload was touching the EQ stoppers.
• Found over load for the BF. Weight of 2.4kg were removed from the cryo-payload so that the keystone of BF can be free.

5th(Thu)

• The cryo-payload was dismounted by the CRY group.
• Removed the wire and cables for cryo-payload from the BF.
• Closed the top chamber.

Plan for coming weeks

• Tune the IP.
• Set the BF damper.

Type B (Mark)

Past week report

At Kamioka (Mark, Ohishi-san, Enzo, Hirata-san, Yoshioka-kun):

• We moved or covered stuff in the BS cleanbooth to prepare for the SR2 crane slot cutting and BS-> SR2 assembly frame move.

• We put the service port covers back on at the BF level of the BS tank.
• We used the PI jacks to center the bottom of the security structure around the RM.
• We debugged a mechanical issue where the #2 IP LVDT had too narrow a gap between the moving and fixed parts, so that there was interference with only a very small clockwise yaw of the IP. We fixed it by moving the bottom baseplate (taking advantage of the fact that it was held by screws in oversize holes for this purpose).
• We used the IP FRs to center the IP.
• We set the gains on the IP LVDT driver.
• We tested the picos and most of the steppers. The picos and IP steppers all work nicely. The PI FR and yaw steppers have jamming issues. We haven't tested the BF and SF FR steppers.
• We debugged an issue with one of the geophones (#1) which has a DC offset. We did cable swaps and determined that the issue is internal to the geophone pod. A second geophone (#2) saturates at a suspiciously small voltage on the negative side. Again the issue is internal.

At Mitaka (Fabian, Hirata-san):

• Fabian designed an improvement to the PI yaw stepper driver mount to stop the stepper jamming.
• Fabian worked on a plan to measure the load capacity of the SR PIs.
• Hirata-san did 2D drawings of the PI for the SR, and of SF2 and SRM in their vacuum chambers.
• Hirata-san did drawings if the SR LBB damper rings and asked for quotes.
• Hirata-san asked for quotes for SR secondary wire breakers and SR IM/IRM lock screws
• Hirata-san ordered SR IM wire clamps.
• Hirata-san worked on parts lists for SR cable clamps.

Plan for week of 10/2

• Design ballast for LBB.
• Design improved PI yaw adjustment.
• SR procurement.

Plan for week of 10/10

Kamioka: Mark, Fabian, Enzo, Ohishi-san, Kozu-kun. Mitaka: Hirata-san Holiday Mon 10/9, Open Day prep Fri 10/13.

• Tune IP, do LVDT/stepper calibration.
• Remove First Contact, try OL.
• TFs, final preparation for alignment in week of 10/16.

Plan for week of 10/16

Kamioka: all but Mark

• Work with alignment team.

Vacation Info

Mark: 10/16-24

Type-Bp (Shoda)

Past week report

• PR2
  • The top chamber is closed in order to protect from the dust.
  • Oplev beam was also aligned.
• PRM
  • We tried to set the oplev, but was not possible because of the vacuum tank interference. Since large YAW drift makes it tough to keep the beam aligned without the oplev reference, we gave up releasing the suspension.
• General
  • All the FC was removed. (Kimura-san gave us an adapter for the gas tube)
  • All picomotors network was checked. (PR2-IM driver was broken)
  • Guardian is ready thanks to Arai-kun.
  • Stepping motor can be actuated from Mozumi via python. Miyo-kun is working on the epics and the medm screen.
    • The stepping motors used in Type-A and B should also be setup. How to set up is described in DGS wiki. We still have a trouble in BO output. So the power cannot be controlled so far. But I think it can be done later. Just turn it on always for now.

Plan for coming weeks

• Comissioning

OMMT & OSTM (Ohishi)

Past week report

Plan for coming weeks

Watchdog system (Tanaka)

Past week report

• I held a meeting to make estimates with several vendors.-->I also requested a new vendor to make a quote(Waiting).

• Waiting for concrete information on installation location.-->Waiting for further detailed placement information.

• Creation of extended I/O PCB plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->Mechanical design is completed.

• Execution of the final version operation test for mass production ->Detailed exam(Ongoing).

Plan for coming weeks

• Creation of extended I/O PCB plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->Start of machining for EX I/O box(19 inch chassis).

• Execution of the final version operation test for mass production ->Detailed exam(Ongoing).

Other site works

• Center area will be a laser hazard area from Oct. 10
• End of Aug. to Nov.: Mozumi entrance will be closed

Safety

• Incidents:
• Foreseen risks
  • Type-A:
  • Type-B:
  • Type-Bp:

Discussion

Plan for the coming months

Travel Plans

• Travel (Week of 10/9):
  • Takahashi: 10-??
  • Okutomi: 10-??
  • Sato: 10-??
  • Ishizaki: 10-??
  • Mark:
  • Fabian:
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR): ??
  • Arai (ICRR): ??
• Travel (Week of 10/16):
  • Takahashi:
  • Okutomi:
  • Sato:
  • Ishizaki:
  • Mark:
  • Fabian:
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR):
  • Arai (ICRR):

Next meeting

On 2017/10/13(Fri)