VIS Meeting on 2015/12/4
2015/12/4 13:30 - 17:30
Room 210 + SeeVogh
Participants: Takahashi, Akutsu, Raffaele, Ishizaki, Tanaka, Mark, Shoda, Okutomi, Fujii, Fabian, Joris, Agatsuma, Hirata, Ohishi, Aso
Schedule
- Schedule status (Aso)
- Latest schedule chart
PR
- Test Hanging Status (Takahashi)
- LVDT driver
- Akutsu-kun checked one LVDT driver in the office. It seems to work fine.
- Will bring this one into the tunnel for the hanging test
- Picomotor connection
- Both In-vac and out-vac cables are ready
- Will test the connection on Monday
- Fishing rod motor
- In-vac cable assembly failed at the site. No spare D-SUB9 at the site.
- Will use a non-vacuum compatible D-SUB for the hanging test.
- Oredered a tool for removing failed pins from D-SUB
- Digital system is not working most of the time
- We should prepare analog alternative for signal checking
- LVDT driver
- PR2 preparation (Mark, Fabian)
- Cleaned up the area
- Set up a temporary clean booth
- Put the steel sheets under the assembly frame
- Hanging frame is now set inside the assembly frame
- Hanging frame is mostly completed
- Location of the EQ stop pillars
- There are 4 holes to hold the EQ stop pillars around the TM, but we use only 3 of them to avoid interference with the main beams.
- Takahashi will give Hirata the desired positions of the pillars
- Hirata will update the 3D model accordingly and give it to Akutsu
Akutsu will check for the compatibility with the OpLev
- A cable clamp to be attached to the suspension rod has a wrong size collet.
- It is already at the site. To be washed.
- Payload weight issue
- BF load check at the ATC
BF#1 Previous measurement 53.1kg without fishing rod. -> 52.9kg w/o fishing rod, 53.3kg with fishing rod
- The theory that we mistook BF#1 for #2 was wrong.
- 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)
Need to prepare additional balast masses with better design-> Fabian will design ones on Monday (12/7) Takahashi and Hirata will make 2D drawings (adding surface treatment information and so on) and order to a company
- BF load check at the ATC
- Traverser actuation check (Shoda)
- Traverser stop mechanism (Shoda)
- Uraguchi-san's plan seems fine
- Procurement status (Takahashi): Told Uraguchi-san about our decision. Will order the parts soon.
- Clean work procedure
Particle count record (Shoda): Got the calibration factor from Hasegawa-kun. 104 cnts/m3 for below 0.3um. -> ISO class 5.
Where to put the floor coach filters for PR2 and PR3 work -> Consult with Hirose-san
- Okutomi had a discussion with the cleaning company.
http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4659
- KAGRA should have a special meeting for clean requirements (Aso will propose to Saito-san)
- PR CAD model and assembly drawings (Hirata)
- Need to give the rotation angle of the traverser top plate (Aso)
- Cable status (Takahashi)
- 12/1: 4th delivery. One more is remaining.
Made a cable list -> Put a link to the excel file on Wiki. Takahashi will improve the table.
- Call for shift for cable checking (Takahashi)
- Liu-kun will come from 12/7
- Call for shift for assembly help (Takahashi)
- Made a call for shift for helping the installation works
- PR2 gluing schedule (Tatsumi)
- Had a discussion with Hirose-san (Aso)
- Hirose-san will apply FC on PR2 on 12/4
- He would like to check the removal of FC on 12/9 from the test hanging suspension. If there is any problem with it, he will redo the FC application on PR2 and PR3 before transportation.
- Schedule
- 12/4: FC application (Hirose)
- 12/7: Flag gluing (Tatsumi)
- 12/10: Packing and transportation (Tatsumi, Manuel, Ishizaki)
- What to transport
- PR2, PR3, original containers of the spare mirror and PR3
- Had a discussion with Hirose-san (Aso)
- Wire cleaning
- We need to clean the suspension wires before the real suspension hanging.
- Buy new wires and do acetone wipe at Mitaka
- Hirata will do the actual wiping (Thu or Fri)
- Mark will send the LIGO procedure to kagra-seis by Mon.
- Fabian will compile the number of wires necessary by Mon.
- Takahashi will buy the wires (by Tue)
- Cleaning of the existing winches
- They get dirty by contacting the oilly wires
- The wires to be installed into the vacuum will not contact the drum part
- Wiping the drum will be sufficient
- Production of additional PR winches (Akutsu)
- Most of the parts were delivered.
- ATC engineers is test assembling the winches (mostly complete)
- RM compensation mass
- Design status (Fabian): Do it later.
Order status (Takahashi): Placed an order. Will check the delivery date -> confirm (Takahashi)
- Need to buy screws for fixing the compensation masses. Takahashi will check the lengths of screws
- For the RM assembly in the test hanging, SUS screws were fine (no gulling). So we will use SUS screws.
- RM EQ stop screw position (Takahashi)
Out sourcing: Need to send the plates to the company -> Sent 6 sets on Tue. One set remaining at the site.
- PR Optical Bench (Akutsu)
For PR3 OpLev, we don't need to have an in-vac reflector. So we don't have to raise the optical bench.
- For PR2, we do need to raise the optical bench.
- Delivery date for the screws: Dec. 21
- PR2 vacuum installation will be Jan. 19
- OSEM assembly status (Akutsu)
- 22 OSEMs were assembled
- 10 OSEMs per suspension, so should be enough for PR2 and PR3
- One risk is that they use old flexible circuits.
- Rails for the hanging frame (Hirata)
- The ball exchange of the rails were finished. Already installed into the PR2 hanging frame.
- Test hanging vacuum installation
- Do we have everything necessary
- Takahashi willl make a procedure by Mon
- Cleaness check by Hirose
- Hirose will come on Wed.
- What needs to be done when the suspension is inside the chamber ?
- Transfer function measurement
- Spectrum
Do we need OpLev -> Yes
- Check the orientation of the mirror
- Using the laser marker
Use OpLev for pitch ?
- Mark will test the laser lever at Kamioka
- Can we use the arm ducts as tilt reference ? (Ask Saito-san)
- Check the height with laser marker
- Peel off the first contact first
- Practice of the suspension cleaning using the air gun
- Inner frame modal analysis with the suspension (Takahashi)
- Do we have everything necessary
- Next week (from 12/7) plan
- Test hanging
- Mon: Preparation of installation into the chamber, LVDT test, Fishing rod test, Picomotor test, cable check instruction
- Tue: Continue the preparation work. Final check of the payload (balance of IM and so on)
- Wed: Install the suspension into the chamber
- Thu: Peel off the first contact. Hammering test. Cleaning practice.
- Fri: Release the EQ stops. Check the free hanging. Check the orientation.
- PR2
- Mon: Assemble hanging frame
- Tue: Find screws and other parts
- Wed: Find screws and other parts
- Thu: Put IM on the frame
- Fri: Receive PR2 mirror. Move the winches from PR3 to PR2
- Test hanging
- Travel (Week of 12/7)
- Takahashi: Mon-Fri
- Shoda: Mon-Fri
- Mark: Mon-Fri
- Fabian: Tue(PM) - Fri
- Okutomi: Mon-Fri
- Fujii: Mon-Fri
- Ishizaki: Thu-Fri
- Hirata:
- Ohishi:
- Travel (Week of 12/14)
- Takahashi: Mon-Thu
- Shoda: Mon-Fri
- Mark: Tue-Thu(AM)
- Fabian: Mon-Fri
- Okutomi: Tue-Fri
- Fujii:
- Ishizaki: Tue-Fri
- Hirata:
- Ohishi:
* Agatsuma: 12/7 - 12/10 * Joris: 12/7 - 12/18
BS
- What to do with BS after iKAGRA (Aso)
- We need to decide on the plan by the end of Dec.
- 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 installation procedure (Aso)
- Sent the final version drawings to Mirapro
- Waiting for quotation
Other
- Watch dog system (Tanaka)
- Need to confirm the maximum output voltage from the coil drivers. Is it less than 14V ?
How many channels are necessary ? -> roughly 100ch
RMS threshold level to be used for the development -> 150mA RMS over 2sec
Damping resistance -> 0 Ohm.
- GAS blade inspection by Virgo (Takahashi)
- Waiting for shipping information:
- 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) -> Status
- Safety at the site (Takahashi, Ishizaki)
- There was a near miss. Please read the report by Ohishi and Ishizaki
Next meeting
2015/12/11 (Fri) 13:30 -