Agenda/Minutes of the VIS Meeting on 2017/4/21

2017/4/21 13:30 -

Participants: Mark, Ishizaki, Takahashi, Aso, Enzo, Fabian, Shoda, Tanaka, Okutomi, Sato, Hirata, Miyo, Perry, Akutsu

Progress report

Schedule Chart : (PDF,MPP)

• Type-A: On schedule (4 weeks delay from original plan)
• Type-B: 7 week delay
• Type-Bp: On schedule

Type-A (Takahashi)

Past week report

Installation in Y-end:

17th(Mon)

• Cleaned the booth and opened the chamber.
• Unpacked the F1 and moved it into the clean booth.

18th(Tue)

• Assembled the end plate 1.
• Checked behavior of F2. The frequency depends on the stress due to the cap.

19th(Wed)

• Extended the EQ stop to the F1 stage.
• Prepared for the F1 damper.
• Cabling of the F1.
• Put the F1 on the EQ stop.

20th(Thu)

• Replaced two release sensors.
• Cabling between F1 and F2.

Plan for coming weeks

• Setting of the F1.
• Prepare for the pre-isolator.

Type B (Mark)

Past week report

At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san):

• Plugged in the second pico cable (accidentally shipped to Mitaka and returned) and tested the pico motors with Miyo-kun's MEDM interface. All worked on FAST speed except IM_YAW. Miyo-kun worked on debugging the SLOW and MED speeds.

• Realized that the SF/BF/... section doesn't need 6 kg added, it needs 6 kg removed, but none to remove. The 20 kg extra in the BF to match the SF GAS filter makes the whole chain overload the PI GAS filter.

• Lifted the SF/BF/... section to check for net weight and balance. Was 307 kg (cf. G&M's measurement of 301 kf in 2012 for the F0). Can be balanced with only 63 g extra.

• Went to build up the LBB blade units but discovered that the holes in the base of the blades are two small (are Ø11 mm; should be Ø12 MM). 3D CAD was correct - error was in the 2D drawing. Shipped the blades away for modification.
• Tested the SF LVDT actuation and worked on debugging it. Still not working.
• Prepared the PI for being lifted, tested the crane adapter, and prepared the top of the assembly frame for receiving the PI.
• Searched for and found the old PI-SF rod. (We went to use the new one but found it doesn't work with the old fittings because it has 8 mm instead of 7 mm heads).
• Did safety improvements after Enzo hit his head on a flange bolt: reversed all the bolts on the ±X sides of the BS and put caution tape on them.
• Worked on understanding/validating/debugging Kokeyama-san's changes to the real-time model for the DIO, and started on TFs to check the output filter compensation is working.

Plan for coming weeks

For more detail, see KAGRA/Subgroups/VIS/TypeB/ToDo.

Week of 4/24 (four-day week):

• Crane in PI.
• Connect SF/BF... section and see if we're indeed overweight and by exactly how much.
• Finish debugging SF LVDT actuation.

Week of 5/1:

• No activity (Golden Week).

What to do with the over weight problem

• If the top filter optimal load is lower than the actual weight of the SF and below:
  • We need to reduce the optimal load of SF
  • By replacing two of the 6 blades in the SF to the BS BF blades, the optimal load of SF will be reduced by 19kg.
  • Currently, we are putting 21kg on the BF to adjust the load on the SF. We will have 2kg to level the BF.
  • We will buy new set of jigs for assembling filters in Kamioka.

Type-Bp (Shoda)

Past week report

• IM TF measured
  • IM OSEMs are adjusted
  • IM TFs are measured
• BF/BFRM stage assembled
  • We closed the cap, and cabling was done till the top of the BF.
  • Set the top plate and Traverser on the assembly frame and connected to the EQ stop.
  • BFRM is suspended from the Traverser interface plate.

Plan for coming weeks

• Optical bench installation test
• Set SF and hang BF (optional)

IMMT (Ohishi)

Past week report

Plan for coming weeks

Watchdog system (Tanaka)

Past week report

• Start operation test of system.-->Interrupution.

  • Resolved.

    • When changing theOS(Win7 to Win10) and building the setup environment of S/W,problem occurs that the debug tool can't be used.-->I confirmed that this problem will be solved by rewriting a part of the registry.

    • A problem occcurred thatcould't be compiled even though the version of the compiler was the same.-->I solved the problem by patching the required include files.

Plan for coming weeks

• Start operation test of system.-->Ongoing.

Safety

• Incidents:
• How to protect our heads in the clean booth ?

  • Photos: https://goo.gl/photos/2j7c3Ver99eC9gSC8

  • clean room helmet https://www.monotaro.com/g/00250428/

  • Cover the sharp objects with soft material ?
  • Better lighting
• Foreseen risks
  • Type-A:
  • Type-B:
  • Type-Bp:

Discussion

• Cable management
• VIS purchase

Travel Plans

• Travel (Week of 4/24):
  • Takahashi: 25-28
  • Shoda: 24-28
  • Mark: 24-27
  • Fabian: 24-26
  • Okutomi: 24-28
  • Fujii:
  • Ishizaki: 24-28
  • Hirata: 24-27
  • Sato: 24-28
  • Enzo: 24-27
  • Ohishi:
  • Tanaka:
  • Perry: 24-28
  • Sekiguchi(Hosei): 24-28
  • Hirayama(Hosei): 24-28
• Travel (Week of 5/8):
  • Takahashi: 8-12
  • Shoda: GWADW
  • Mark: 9-12
  • Fabian: 9-12
  • Okutomi:
  • Fujii:
  • Ishizaki: 8-12
  • Hirata: 9-12
  • Sato: 8-12
  • Enzo: 9-12
  • Ohishi:
  • Tanaka:
  • Sekiguchi(Hosei): 8-12
  • Hirayama(Hosei): 8-12

Next meeting

On 2017/4/28(Fri)