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• VISMinutes20161118

Agenda/Minutes of the VIS Meeting on 2016/11/18

2016/11/18 13:30 - 16:00

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

Progress report

Schedule Chart (PDF,MPP) To Be Updated

Type-A (Takahashi)

• Minutes of Type-A Meeting

• Installation: Asking a company the cost and schedule for transportation of Type-A items from the center area to the 2F of Y-end.
  • We need to reconsider the schedule of this work as more things will be delivered at the end of Dec.
  • The constrain is that we need to use the PI for the vacuum test.

  • Aso will discuss with Saito-san about this.

• Pre-isolator: Mechanical assembly of two sets were finished. They will be shipped on 1st December.
  • The PI for SRs will be transported on 21st from Akeno. 6 ACCs were measured at the site.
  • There are 9 aluminum ACCs and 6 Cube ACCs. In the end we need 12 ACCs. We found 2 bad aluminum ACCs. If we find two more bad ones, we will not have enough number of ACCs.
  • Need to check if the bad ones can be repaired. If not, we need to consider how to deal with it.
• EQ stop, release sensor, dummy payload: Production is on going.
• BF damper: There was a meeting with the production company on 15th.
  • We should perform a complete assembly of the BF damper before installing into the vacuum tube.
• Maraging wire: Asking the company a quotation. The procurement of material was confirmed. They will send a quote very soon.
• Tooling for installation: Main tools (foothold, chain block, lifer) were ordered. Still asking companies a quotation of the hoist tool.

Type B (Mark)

• Type B Past Week Summary
  • Mark and Hirata-san worked at Kamioka, with valuable help from Enzo (on loan from Type Bp team).
  • We got all the adapter cables for the BF made (Hirata-san did some work on Monday at Mitaka).
  • We installed the extension for the BF yaw pico on the IM pico adapter cable.
  • We got all the in-vacuum and in-air cabling for the IM OSEMs done.
  • We tried to install the stepper and LVDT adapter cables but realized we didn't have enough information on which wires was which. (We later tracked this info down but did not have time to do anything with it - we would have needed to do the rest of the in-vacuum and in-air cabling and set up the stepper motor and LVDT drivers, so we concentrated on the OSEMs.)
  • We plugged in the IM OSEMs, set gains and offsets, and did a noise test (analysis and klog pending).
  • We mounted the OSEMs on the IRM and routed the cabling neatly.
  • We released the suspension.
  • We adjusted the OSEM mounting plates to center the OSEMs on the flags.
  • We adjusted the OSEMs in/out to midrange.
  • The suspension is now ready for OSEM-OSEM TFs!

Type-Bp (Shoda)

• One od the TM flags was detached in the vacuum tank
  • One of the TM flag (the one with small amout of the glue) was detached in the vacuum tank when we opened the flange. It was detached after we evacuate the tank and measured some transfer functions. It may be detatched naturally. The one with much glue is still surviving after the accident. It seems that the important thing for the flag on TM is amount of glue rather than shocks. (And we do not know how much Tatsumi-san put glue on them...)
• Ordering
  • Most of the things for PR3/2 are ordered. Now asking the delivery date.
• Tools for installation into the vacuum
  • Miyoki-san gave us the information of the chain blocks that can be used in the clean booth. It is expensive. Now I am asking to put the jacks on the inner frame together with the OB installation jigs.
• Additional IM clamp
  • should be ordered together with PRM/SRM payloads.
• The EQ stops at Akeno
  • should be cleaned. Takahashi-san is asking the cost estimation.
• Flag removing
  • Jigs will be delivered till Nov. 31th. Flag removing will be done on Dec. 1st.
• Assembly frame
  • Will be modified till Dec. 9th.
• Assembly procedure lecture will be help on Nov. 24th 15:00-.

IMMT (Ohishi)

• Put a report here

Watchdog system (Tanaka)

• Showed the current design at the AEL meeting.
• The box size must be 1U. Doing the heat design again.
• Will visit Kamioka sometime soon to discuss more with AEL people as well as to see the site situation.

Safety

• Incidents
  • Strange smell came out of the AOS baffle (AOS)
  • A person walked in the tunnel without helmet (IOO)
• Foreseen risks
  • No site work in the next week

Discussion

• PR3 accident: future actions
  • Specific measures for this incident
    • Making the long rod shorter.

      • With the new flag design, we may be able to make them short. -> Check with 3D CAD in the next week (Shoda, Hirata, Takahashi)

    • Improved disassembly procedure
      • Option 1: Lock the mirror in the RM and cut the wire. Then open the RM and move the mirror to the mirror box.
        • How to handle the mirror is the question. Especially BS is heavy. We need to consult with Hirose-san.
      • Option 2: Modify the mirror box base so that the position of the mirror box is adjustable
    • We will continue this discussion.
  • General measures to prevent future accidents
    • Protecting the mirrors
      • Have a review of work procedure before doing any work on moving the mirrors
    • Have a daily briefing of the VIS work before starting the work
    • List up potential hazards (both to human and instruments)
    • Confirm and share the work procedure with all the workers before working on the suspension
    • Discuss about potential hazards (both to human and instruments) at the weekly VIS meeting for the works to be done in the following week
    • Make sure to have at least two experts when doing a sensitive or risky work
    • Do not try to do sensitive work when tired.

    • Aso will write a section about the above in the PR3 accident report.

Site work plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

Travel Plans

• Travel (Week of 11/21):
  • Takahashi: 21 Akeno
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Sato:
  • Enzo:
  • Ohishi:
• Travel (Week of 11/28):
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki: 12/1-2 (receive PI)
  • Hirata:
  • Sato:
  • Enzo:
  • Ohishi:
• Long term travel plan

  • Takahashi: Dec. -> Mar.

  • Shoda: Dec. -> Mar.

  • Mark: Dec. -> Mar.

  • Fabian: Dec. -> Mar.

  • Okutomi: Dec. -> Mar.

  • Fujii:

  • Ishizaki: Dec. -> Mar.

  • Hirata: Dec. -> Mar.

  • Sato: Dec. -> Mar.

  • Enzo: Dec. -> Mar.

  • Ohishi:

• All the teams should update the schedule from Dec. by the next meeting, so that the above travel plans become more realistic.

Next meeting

On 2016/11/25(Fri)

VIS F2F: Dec. 2