VIS Meeting on 2015/12/11
2015/12/11 13:30 - 16:30
Kamioka NAOJ Room + SeeVogh
Participants: Shoda, Fabian, Fujii, Mark, Ohishi, Joris, Takahashi, Aso, Hirata, Tatsumi, Raffaele, Okutomi
Schedule
- Schedule status (Aso)
PR
- Test Hanging Status (Takahashi)
- Suspension was dumped into the chamber: the hook of a turn backle came off while slowly sitting the suspension into the chamber. The entire chain dropped by about 1cm. With this shock, at least 1 OSEM flag in IM was broken.
- LVDT driver: The one used at first had a broken IC. Replaced with a new board and it worked. Need to set the gains properly. Will put information into the corresponding DCC documents.
- Picomotor connection: Worked fine.
- Fishing rod motor: Worked fine. Pin-extracter was delivered. So the damaged vacuum compatible cable can be fixed.
- While lowering the jacks on the inner frame, some of them seemed to have galled.
- How to sit the suspension to the inner frame ?
- Lift up the suspension. Remove the galled jacks.
- Inspect the removed jacks.
- Put new jacks.
- Try to sit the suspension usign turn backles.
- Use 4 slings instead of 2.
- Carefully level the top plate.
- Lift up the suspension. Remove the galled jacks.
- PR2 Status (Mark, Fabian)
- Finding screws and parts.
- Cleaned some parts.
- What can we do before the PR2 arrives
- RM assembly
- Traverser assembly
- Preparation of the flags
- Sand the Ni-plating on the magnets before gluing to increase the adhesion ?
Need to order spare flag bases: 6 of them (Takahashi)
- Location of the EQ stop pillars (Takahashi)
Takahashi will tell Hirata the proper locations of the pillars.
- Digital System (Okutomi, Fujii)
- The model is almost completed.
- Now the digital system is working. We were able to measure transfer functions.
- BF Optimal Weight (Takahashi)
Check the optimal load for the ETM BFs at the ATC: Need to be done before the end of Jan. Arrange with ATC people (Takahashi)
Balast mass design: Takahashi will check the design during the weekend and give (not give) an approval before Monday.
- Fabian will give the design to Hirata-san on Monday.
- Traverser actuation check (Shoda)
- Now we may move the traverser in the air a little bit.
- Will test it at some point.
- Traverser stop mechanism
- Procurement status (Takahashi): Parts were ordered. Should arrive in one week.
- Clean work procedure
Need to check with Miyoki-san when the clean suits will be delivered (Aso).
Ask Hirose-san about better wiping cloths (Aso).
- Other clean supplies: masks,
KAGRA should have a special meeting for clean requirements: Aso had a meeting with Saito-san and Hirose-san. But the meeting was interrupted by a car accident. Will propose another meeting (Aso).
Blowing the suspension in the assembly frame -> Need to pre-arrange the schedule with other groups.
- PR CAD model and assembly drawings (Hirata)
Need to give the rotation angle of the traverser top plate (Aso)
- Cable status (Takahashi)
- All the cables except for two cables were delivered.
- Need to send more PTFE cable to finish the remaining two.
- Need to send the cables used for the test hanging once it is finshed.
Made a cable list -> Put a link to the excel file on Wiki. Takahashi will improve the table.
- All the cables except for two cables were delivered.
- Cable check
- 70% done.
One cable found to be broken. Will send it back to the company (Takahashi).
- Call for shift for assembly help (Takahashi)
- Made a call for shift for helping the installation works
- No application so far
- PR2 gluing schedule (Tatsumi)
- PR2 wire breakers have cracks
- PR3 ones have no crack. PR3 was transported to Kamioka
- Use SUS wire breakers for iKAGRA mirrors ?
- PRC mirrors will not suffer from the thermal noise
- For SRC mirrors, we should test the sapphire wire breakers more carefully
- Removal of the wire breakers
Mark will ask LIGO people about the procedure
Contact manufacuturer (Tatsumi)
- Wire cleaning
- Damaged one wire
Hirata will order 20m more wires.
- Will wash Tungsten wires too, but not yet delivered.
- Production of additional PR winches (Akutsu)
- Question from Akutsu-kun
What is the weight each drum should support -> Shoda will calculate
What is the wire diameter to be tested? -> 650um: Takahashi ordered 600um and 650um already. Will give 1m to ATC for the test. Takahashi will order some extra for 650um.
- RM compensation mass
Design status (Fabian): Do it later.
- Order status (Takahashi): Delivered. Hirata washed and sent them to Kamioka.
Need to buy screws for fixing the compensation masses. Takahashi will check the lengths of screws.
- RM EQ stop screw position (Takahashi)
- Out sourcing: 6 sets delivered washed and sent to Kamioka. Now we have all needed.
- PR Optical Bench (Akutsu)
- For PR2, we do need to raise the optical bench.
- Delivery date for the screws: Dec. 21
- PR2 vacuum installation will be Jan. 19
- For PR2, we do need to raise the optical bench.
- OSEM assembly status (Akutsu)
7 OSEMs sent to Kamioka http://klog.icrr.u-tokyo.ac.jp/osl/?r=431
- OSEM screw length issue
- We have a lot of M5x20 BUMAX screws
Do we need to use longer ones ? -> Shoda will check with the actual test mass RM
- RM production (Takahashi)
What to do with the dirty RMs ?: Check with ATC if re-polishing the rough surface is possible or not (Takahashi)
- Test hanging vacuum installation
- What needs to be done when the suspension is inside the chamber ?
Peel off the first contact first -> Done
- Cabling
OpLev preparation
- Hammering test
- Test of cleaning by blowing
- Transfer function measurement
- Spectrum
- Check the orientation of the mirror
- Check the height with laser marker
- What needs to be done when the suspension is inside the chamber ?
- List of what should be changed for PR3 hanging
- People should share ideas whenever they come up with missing thigns.
- Shoda made a spread sheet for keep tracking the ideas
- Next week (from 12/14) plan
- Test hanging
- Mon: Replace the jacks
- Tue: Replace the jacks
- Wed: Cleaning test, Hammering Test
- Thu: Cabling
- Fri: Release the EQ stops
- PR2
- Mon:
- Tue: Assemble RM
- Wed: Put IM
- Thu: Assemble RM carrage
- Fri: Preparation for traverser assembly
- Test hanging
- Travel (Week of 12/14)
- Takahashi: Mon-Thu
- Shoda: Mon-Fri
- Mark: Tue-Thu(AM)
- Fabian: Tue-Fri
- Okutomi: Tue-Fri
- Fujii: Mon(aft)-Fri
- Ishizaki: Tue-Fri
- Hirata:
- Ohishi: Tue-Fri
- Travel (Week of 12/21)
- Takahashi: Thu-Fri
- Shoda: Mon-Fri
- Mark: Mon-Tue
- Fabian: Mon-Fri
- Okutomi: Mon-Fri
- Fujii: Mon-Fri
- Ishizaki:
- Hirata:
- Ohishi:
* Joris: 12/7 - 12/18
BS
- What to do with BS after iKAGRA (Aso)
- We will do the BS first
- BS Assembly Frame Design (Aso, Hirata)
- BS flag design (Mark, Fabian)
- BS gluing jigs (Tatsumi)
- Not enough crane height problem (Hirata, Saito)
- IP base clamp (Fabian)
- Bread board spring (Takahashi)
- BS clean bag (Aso)
ETM
- ETM assembly frame (Aso)
- Waiting for quotation from Mirapro (sent a reminder)
- Optical table was ordered: delivery date 1/19
Other
- bKAGRA preparation
- Roadmap discussion with Ando-san (Schedule Chart)
- DGS request. They need 3 weeks of preparation time before suspension installation.
List of tasks for: BS, Type-A, Type-Bp modification, IMMT. Make a draft list (Takahashi). Set up a Wiki page (Aso)
- Roadmap discussion with Ando-san (Schedule Chart)
- Watch dog system (Tanaka)
- Will present at an AEL meeting.
- GAS blade inspection by Virgo (Takahashi)
- Waiting for shipping information: Go the shipping address. To be shipped soon.
- Request to the ATC for the next year
Production of the blades of the Type-A BF: We should check the consistency of the optimal load at the TAMA prototype experiment and G&M measurements (SF and TF) (Takahashi) -
SF: G&M 164.7kg, TAMA: 165.3kg
TF: G&M 276kg, TAMA: 278kg
No obvious reason to distrust G&M's measurements
- Should consider in-situ measurement procedure of the optimal load during the installation of Type-A
- Safety at the site (Takahashi, Ishizaki)
- A big near miss during the suspension installation into the chamber
Next meeting
2015/12/18 (Fri) 13:30 -
Next F2F Meeting: Jan 8