Agenda/Minutes of the VIS Meeting on 2018/1/19

2018/1/19 13:30 - 14:45

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

Progress report

Schedule Chart

Type-A : (PDF/MPP)

Type-B: (PDF,MPP)

Type-A (Takahashi)

Past week report

[Y-end]

• Connected the PT100 sensor for BF to the monitor system for CRY.
• Checked the yaw rotation in BF. No problem.

[X-front]

• Installed the main items (footholds, workbench, chairs, tools, etc.) into the clean booth.
• Attached the release sensors onto the end plate for DP with cabling.
• Started the assembly of side stopper. The parts for slider had a problem (too tight).

[SRM]

• Took out the IP and TF from each box.
• Found the blades (2 of 3) for TF were broken (completely cut off). The blades were removed.
• Combined the IP and the TF. Connected the IP legs with the TF plate.
• Cabled the vertical LVDT coils.
• Fixed the upper plate of LVDT-Actuator units onto the TF plate.
• Assembled the fishing rod of TF with cabling.
• Assembled the yaw rotary of receptacle in the TF.
• Packed the PI into the box.

Plan for coming weeks

• The evacuation of EYV chamber will be started in the 23th morning.
• Pre-assembly of BF damper.
• Assembly of DP stage.

Type B (Mark)

Report for week of 1/15

• We set up the QPD for the OL, initialized the OL and TM sections of the RTM, and did TFs from the TM OSEMs to the OL.
• Initially we had no coherence, but we debugged issues with the watchdog, LPCD, and DAC board and then got good TFs.
• We lifted the IM/RM/SR with the load gauge adapter and checked the weight, which was close to the mass budget.
• We installed the section of the AF above the IM, and the BF cross bars and jacks, and craned in the BF.
• We installed the BF-IRM rods, IRM, BF-IM rod, flying saucer and the cable clamps on the bottom of the BF.
• We hooked the IM section, but found it was heavy by several hundred grams. We also noticed the BF keystone had a noticeable tilt of about 1.2 mm (high on the +X side).
• We removed 738 g of trim mass and found that load rose and sat about 2 mm high. So the discrepancy is of order 500-600 g.
• Shoda-san, Enzo and Kozu-kun made and characterized a batch of OSEMs.
• Hirata-san finished drawings for the improved BS PI yaw/vertical adjustment, placed orders for damping ring receptacles and other items, and prepared the second SR BF in case we needed to swap it in.

Plan for week of 1/22

• Fix or swap BF.
• Route selected cables to flange.
• Test IM picos and BF yaw pico.

Plan for week of 1/29

• Enzo at Mitaka 1/29 and most of 1/30, then vacation.
• Kozu-kun away.
• All others at Kamioka.
• Build IRM around IM.
• Cable/test/adjust IM OSEMs.
• Time permitting, do TFs from IM OSEMs to themselves and to optical sensor.

Vacation Info

• Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30)
• Kozu-kun 1/29-2/2

Type-Bp (Shoda)

Past week report

Plan for coming weeks

OMMT & OSTM (Ohishi)

Past week report

• Hanging jig parts arrived from FCL. Some minor problems need to be fixed. Drawings will be delivered today.
• Visited machine shop of Toyama Univ. Asked them to make some mechanical parts.

• Made a parts list and checked the status. Will update from time to time.

• Vertical vibration isolation bellows.
  • Firstly contacted with Mirapro but they cannot make the ones we are now using. I'll contact with NIPPON VALQUA INDUSTRIES, LTD.
• Mirror status
  • OMMTs will arrive soon. OSTM will be ordered next FY. Perhaps need half a year.

Plan for coming weeks

• Check hanging jig drawings.
• Assemble the hanging jig.
• Resume OSEM test.

Watchdog system (Tanaka)

Past week report

Plan for coming weeks

Other site works

• Jan. 25: Monthly inspection of the cranes (11:30 - 12:30)
• Feb 18: Black out of the Mozumi buildings

Safety

• Incidents: no incident
• Foreseen risks
  • Type-A: Crane
  • Type-B: Crane
  • Type-Bp: None

Discussion

Temperature sensors

• PR2, SR2 installed
• PR3, PRM are not yet installed. Currently put in the front room.
• BS sensor needs to be moved to the chamber
• VIS team will do the maintenance (battery change) of those sensors

Broken SRM TF blades

• Check the blades for the ITM TFs if they have similar problems (Takahashi)
• Check the BS TF blades when the next we open the BS chamber (Mark)
• Send the broken blades to Virgo for inspection (Takahashi)

Travel Plans

• Travel (Week of 1/22):
  • Takahashi: 22 - 26
  • Okutomi: 22 - 26
  • Sato: 23 - 26
  • Ishizaki: 23 - 26
  • Mark: 22 - 26
  • Fabian: 22 - 26
  • Hirata: 25 - 26
  • Enzo: 22 - 26
  • Shoda: 22 - 26
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR): 22 - 26
  • Arai (ICRR): 22
• Travel (Week of 1/29):
  • Takahashi: 29 - 2
  • Okutomi: 29 - 2
  • Sato: 29 - 2
  • Ishizaki: 30 - 1
  • Mark: 29 - 2
  • Fabian: 29 - 2
  • Hirata: 29 - 2
  • Enzo:
  • Shoda: 29 - 2
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR):
  • Arai (ICRR):

Next meeting

On 2018/1/26(Fri)