Agenda/Minutes of the VIS Meeting on 2017/12/1

2017/12/1 13:30 - 14:40

Participants: Mark, Hirata, Ohishi, Arai, Fabian, Aso, Enzo, Ishizaki, Takahashi, Sato, Tanaka, Okutomi

Progress report

Schedule Chart

Type-A : (PDF,MPP)

Type-B: (PDF,MPP)

• Type-A: 1 week delay
• Type-B: Waiting for the schedule

Type-A (Takahashi)

Past week report

[X-end]

• Checked the ACCs with the drivers.

[Y-end]

• Replaced the blades for FR in the BF.
• Pre-assemled the maraging wire for the cryo-payload with the junction box.
• Inserted the wire from the cryostat.
• Hooked the wire on the BF.
• Installed the cryo-payload into the cryostst.
• Suspended the cryo-payload from the BF.
• Tuned the BF and the F3.
• Applied the cabling between the BF and the cryo-payload.

Plan for coming weeks

• X-end: Installation of the pre-isolaotor and reassembly of the BF damper.
• Y-end: Align the cryo-payload by the FR and the picomotor in the BF.

Type B (Mark)

Past week report

• We brought the SR2 optic into the tunnel and moved it into the good mirror box. The spare mirror was moved into the not-so-good mirror box.
• Enzo assembled the SR2 rack and laid all the long cables from the rack into the cleanbooth. (Hayakawa-san can now proceed with the rebuilding of the changing cleanbooth.)
• Mark and Shoda-san took data for calibrating and diagonalizing the OL. (Due to the odd angle of the first steering mirror, the beam pattern is rotated by 62° at the QPD.)
• Enzo found nearly all in-vacuum cables.
• Enzo and Shoda-san got several more loops closed on the BS.
• Mark found three geophone pods and two feedthrough adapters for SR2 (now have 3 FAs but need 4).
• Mark took out S-numbers for anonymous boxes in the SR2 and put yellow stickers supplied by Tomura-san on them.
• Hirata-san worked on SR procurement.
• Hirata-san worked with Mirapro to get the SRM LBB installed in the tank.

Plan for week of 12/4

• Mark at Kamioka.
• Fabian at f2f satellite meeting Mon, then Kamioka.
• Enzo at f2f then Mitaka.
• Hirata-san at Kamioka Mon-Thu, Mitaka Fri.
• Kozu-kun Thu only.
• Mirror gluing.
• IM assembly and pico test.

Plan for week of 12/11

• Mark, Fabian, Enzo, Hirata-san, Shoda-san at Kamioka.
• Kozu-kun Mon-Thu only.
• Assembly frame alignment and optical table centering.
• Move trolley system from SR3.
• OL setup.

Plan for week of 12/18

• Shoda-san vacation
• Mark, Fabian, Enzo, Kozu-kun at Kamioka Mon-Wed.

Vacation Info

• Mark 12/22-1/3
• Enzo TBD, probably 12/22-1/3
• Fabian 12/22-1/5
• Hirata-san 12/21-22 (conference)
• Shoda-san 12/18-21

Type-Bp (Shoda)

Past week report

• PRM inner frame fixed
  • We found the fixing on the vacuum tank legs are not perfect.
  • Mirapro people jacked up the inner frame to insert the sims. And fixed the inner frame. (The vacuum tank was not fixed.) The floor level is not nice.
  • Inner frame is now leveled and removed the sims on the Traverser stages.
• PRM released
  • The suspension was released. As far as looking at the spectra, the suspension is not touching.
  • The transfer functions should be checked.
• PR3 again largely tilted
  • OSEM DC position change is again required.

Plan for coming weeks

• F2F
• Asked Ohishi-san to work on the adjustment of the OSEMs.

OMMT & OSTM (Ohishi)

Past week report

• Checked in-vac cable number.
  • Possible change of mirror actuator from coil to OSEM, makes the number of cables increase than expected.
• Received quotation from FCL. Need to fix some minor problems.

Plan for coming weeks

• Resume evaluation of OSEMs.

Watchdog system (Tanaka)

Past week report

• Retest in Mitaka.-->There is no problem in operation test at all.

• Continuous operation test(Over 100 hours).-->

  • Temperature rise.-->No problem.

  • WD operation.-->No problem.

• Start ordering mass production version.-->Ongoing(Formal request for quotation from the vendors.).

Plan for coming weeks

• Plan the operation test again at KAGRA-->

  • Actual test of WD operation(Retest).
  • The next on site test of the WDS: From 12/12(Tue) - 14(Thu)

Other site works

Safety

• Incidents: Dropped the BF cap by 1 cm when opening it (Type-A, Y-End)
• Foreseen risks
  • Type-A: Crane work
  • Type-B: Crane work
  • Type-Bp: No heavy work

Discussion

2nd Brainstorming on how to exchange the payload part without completely disassembling the suspension chain

• Postponed to the next week

Travel Plans

• Travel (Week of 12/4):
  • Takahashi: 4 - 8
  • Okutomi: 4 - 8
  • Sato: 4 - 8
  • Ishizaki: 4 - 7
  • Mark: 4 - 8
  • Fabian: 5 - 8
  • Hirata: 4 - 7
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR): 7
  • Arai (ICRR):
• Travel (Week of 12/11):
  • Takahashi: 11-15
  • Okutomi: 11-15
  • Sato: 11-15
  • Ishizaki: 11-15
  • Mark: 11-15
  • Fabian: 11-15
  • Hirata: 11-15
  • Enzo: 11-15
  • Shoda: 11-15
  • Ohishi:
  • Fujii:
  • Tanaka: 12-14
  • Kozu (ICRR): 11-13
  • Arai (ICRR):

Next meeting

On 2017/12/8(Fri)