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• VISMinutes20180112

Agenda/Minutes of the VIS Meeting on 2018/1/12

2018/1/12 13:30 - 14:30

Participants: Mark, Shoda, Takahashi, Ohishi, Sato, Fabian, Arai, Kozu, Ishizaki, Enzo, Aso, Hirata

Progress report

Schedule Chart

Type-A : (PDF/MPP)

Type-B: (PDF,MPP)

Type-A (Takahashi)

Past week report

[X-end]

• Replaced the vacuum gauge.
• Connected the PT100 sensor to the monitor.
• Fastened the top chamber and the hatch on the cross tube.
• Started evacuation of EXV chamber on the 28th in Dec. The present pressure is 78Pa.
• Transported the items to the center room (footholds, workbench, chain bolocks, tools, etc.)

[Y-end]

• Transported the dummy payload to the center room.

[X-front]

• Lifted up the items from the X/Y-end.

Plan for coming weeks

• The evacuation of EYV chamber will be started in the 19th morning.
• Prepare to start assembly of DF in the clean booth.
• The short rod for DP is missing.
• The assembly of pre-isolaor for SRM is planed.

Type B (Mark)

Report for week of 12/25

• Hirata-san got the L-brackets machined and washed, and installed them on the IM ring bars.
• Shoda-san recovered the BS from the power outage on 12/25.
• Miyakawa-san fixed an issue with the SR2 RTM which had prevented it from running.
• Shoda-san, Hirata-san and Kozu-kun cleaned the assembly frame and installed new jack receptacles on the load gauge adapter.
• They weighed the IM without ballast masses, and then added the lower masses and installed the IM on the assembly frame.
• They installed the winch system on the IM, and inspected the clamp pieces for possible scratches.
• They ran cables for the SR2 steppers and OSEMs.
• They calibrated the BF LVDT.

Report for week of 1/4

• Mark fixed a number of errors with the Type B screens.

Report for week of 1/9

• We weighed the mirror in its box (and later the empty box), and the RM.
• Fabian worked on the SR2/SR3/SRM mass budget and did an inventory of spare ballast masses.
• We hung the SR2 and RM.
• We assembled the bottom section of the security structure below the RM.
• We cabled the RM OSEMs up to the IM.
• Hirata-san gave up on waiting for a third quote for the blades and blade parts and started the ordering process.
• Hirata-san got rod cable clamp parts from Takahashi-san and worked on drawings for the improved BS vertical and yaw adjusters.

Plan for week of 1/15

• Fabian at Mitaka Monday 1/15 to inspect filter load test items.
• All at Kamioka.
• Shoda-san to work on making OSEMs - Enzo and Kozu-kun to help and learn.
• Test RM OSEMs.
  • Check coil driver is successfully driving current.
  • Time permitting, do TF test from coils to OL pitch and yaw.
• Suspend IM using load gauge adapter, and check/adjust total mass and balance.

Plan for week of 1/22

• All at Kamioka
• Bring in BF and suspend IM.
• Route final RM/IM cables up to below BF.
• Recheck/adjust total mass and balance.
• 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

• Talked with Miyakawa-san about digital system for OMMT/OSTM.
  • He will prepare the rack around this spring.
• Prepared Al stand for OSEM test.
  • I found that coil wire of a sample OSEM was broken.
• Ordered non-magnetic screws for Intermediate Mass.
  • Nabeya Bi-tech Kaisha(NBK) recommend material Ti-6Al-4V.

Plan for coming weeks

• Aso-san will send remaining (about 40?) OSEMs from Mitaka.
• Some parts for hanging jig ordered last year will arrive.

Watchdog system (Tanaka)

Past week report

• Order request has been completed(To order the University of Tokyo).--> Delivery completed. And Digikey's parts delivery completed.

• Start other ordering.-->Meeting due to order change procedure to vendor.

Plan for coming weeks

• Start ordering sequentially for mass products..-->But some adjustment works are necessary.

• Preparation for assembly of mass products.

Other site works

• Parking space

Safety

• Incidents:
  • Touched a mirror suspension wire during assembly
  • Bumped the back of VOXY
• Foreseen risks
  • Type-A: Crane work
  • Type-B: Crane work

Discussion

• Commissioning support
  • Okutomi-kun will available during the initial pump down
  • Some of the Type-A members will always be in Kamioka. They can operate motors for alignment adjustment.
• Lab. temperature
  • We want to have the same temperature during the assembly and observation
  • The current temperature (21 deg. ?) is comfortable.

Travel Plans

• Travel (Week of 1/15):
  • Takahashi: 15 - 19
  • Okutomi: 15 - 20

  • Sato:15 - 19

  • Ishizaki:15 - 19

  • Mark: 15 - 19
  • Fabian: 16 - 19
  • Hirata: 15 - 19
  • Enzo: 15 - 19
  • Shoda: 15 - 18
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR): 15 - 19
  • Arai (ICRR): 15 - 19
• Travel (Week of 1/22):
  • Takahashi: 22 - 26
  • Okutomi: 21 - 26
  • Sato: 22 - 26
  • Ishizaki: 22 - 26
  • Mark: 22 - 26
  • Fabian: 22 - 26
  • Hirata: 22 - 26
  • Enzo: 22 - 26
  • Shoda: 22 - 26
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR): 22 - 26
  • Arai (ICRR): 22 - 26

Next meeting

On 2018/1/19(Fri)