Agenda/Minutes of the VIS Meeting on 2017/6/2
2017/6/2 13:30 - 15:10
Participants:Mark, Shoda, Ohishi, Aso, Okutomi, Enzo, Akutsu, Hirata, Fabian, Takahashi, Ishizaki, Tanaka, Sato
Progress report
- Type-A: Updated the schedule. Will revise the schedule chart soon.
- Type-B: 6 weeks delay
- Type-Bp: Schedule depends on when the PR2 flags will be removed. Roughly 3 weeks delay.
Type-A (Takahashi)
Past week report
Installation in Y-end:
29th(Mon)
- Tuned the TF roughly.25kg weight was necessary to obtain the optimal load.
- Installed the SF damper. The shield plate was fliped.
- Dropped the head part of jack for the PI (accident).
30th(Tue)
- We should cover the gaps as soon as a crane work is done.
- Lifted up the EQ stop to take the dropped part.
- Mounted Cu plates (~20kg) onto the F1.
- Tuned the TF again. 6.7kg ballast weight was added.
- Suspended the SF damper.
31st(Wed)
- Applied cabling between the F1 and the TF.
1st(Thu)
- Continued cabling. Repaired some broken cables.
- Checked the motion of stepping motors.
2nd(Fri)
- Calibrated the LVDT for TF.
Plan for coming weeks
- Lift down the top plate to the frame lock.
- Set the PI in the chamber.
Discussion
- The yaw actuator on the top filter does not move because of too much friction.
- We should consider using a better bearing, a stronger motor and a stronger spring.
- Replace them when CRY will suspend the real mirror ?
- We need to make more concrete plan for X-End. Takahashi will update the schedule chart
Type B (Mark)
Past week report
At Kamioka (Mark, Fabian, Enzo, Hirata-san):
- Enzo and Fabian routed all the SF/... cabling up past the SF and anchored it to the PI.
- Enzo and Fabian moved the vacuum feedthroughs to new positions on the assembly frame corresponding more closely to the positions on the tank.
- Hirata-san received the LBB blades back from additional machining, and he and Mark characterized them, and chose the 3 that were most closely matched. The total load capacity is 294 kg, which is rather larger than the 202 kg for the LBB and intermediate ring.
- Mark measured all the coil resistances for the LVDTs and steppers on the PI to check everything was wired properly.
- Hirata-san received the outrigger plates for the LBB black from additional machining to add helicoils but discovered that they were not M16 fine pitch but M16 regular. He sent them off again to be corrected.
- Mark and Hirata-san inspected the vacuum tank and discovered that the top section is on backwards relative to the 3D CAD so that the jacks supporting the tank and the jacks supporting the PI via bellows are interchanged. We decided that, for the test hang, we would put the suspension in with a 135° anticlockwise rotation (instead of a 45° clockwise one). For the final hang, we will build the suspension with the BS/RM section backwards.
- Fabian moved the F0 trim mass from on top of the F0 keystone and anchored it to the SF, keeping about 0.5 kg in reserve to allow for the weight of the SF-PI cables.
- Enzo, Fabian and Hirata-san rearranged the in-air cabling for the OSEMs to match changes to the in-vacuum cables.
- Hirata-san assembled the rods for the LBB and LBB damper.
- Mark released new editions of E1503600 (BS circuit diagram) and E1503901 (in-vacuum cable detail) and updated Sato-san's cable spreadsheet.
Plan for coming weeks
For more detail, see KAGRA/Subgroups/VIS/TypeB/ToDo.
Week of 6/6:
- Cabling:
- Finish moving in-air cabling to match feedthrough positions.
- Cable and test PI vertical LVDT.
- Calibrate PI vertical LVDT.
- Set yoke on PI vertical LVDT (if necessary).
- Cable and test PI yaw stepper.
- Cable and test PI vertical stepper.
- Cable and test PI horizontal steppers.
- Cable and test PI horizontal LVDTs.
- Calibrate PI horizontal LVDTs.
Week of 6/12:
- Remove -Y flange cover, replace with cloth cover (or foil).
- Prepare LBB.
- Wipe LBB.
- Loosen or remove LBB hold-down bolts.
- Attach LBB outriggers and rod receptacles.
- Lay out slings for LBB damper rings.
- Prepare LBB damper support.
- Install rods for LBB magnet ring.
- Install safety rods for LBB Cu ring.
- Prepare LBB Cu ring.
- Pass into tank.
- Reassemble on top of slings.
- Lay down spacers to protect magnets (in next step).
- Prepare LBB magnet ring.
- Assemble temporarily.
- Attach magnets with template.
- Disassemble.
- Pass into tank.
- Reassemble on top of Cu ring.
- Install LBB damper.
- Pass sling ends through loops to bind LBB damper rings.
- Remove vacuum tank lid and ring.
- Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method.
- Crane suspension into tank.
- Hook LBB Cu ring.
- Hook LBB.
- Crane vacuum tank lid+ring black on.
- Remove vacuum tank lid (only).
- Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring.
- Cabling, cabling, cabling.
Type-Bp (Shoda)
Past week report
- PR3 chamber closed. PR3 (almost) completed!!
- We finalized the cabling. Miyo-kun is still working on networking the motors, and BIO.
- We closed the chamber.
- We moved some parts, tools, a desk, a rack to PR2 clean booth.
- Preparation for PR2 assembly is on going.
- 2nd floor next to the assembly frame was closed.
- Optical bench intermediate ring and damper ring are set inside the chamber.
- PR2 flags are close to be detached hopefully.
Plan for coming weeks
- Set assembly frame
- Set the IM and the slider on the assembly frame
- Prepare circuits for PR2/PRM
- BF LVDT calibration
IMMT (Ohishi)
Past week report
- Type-C magnet fixture jig retrofitting:
Uploaded Parts_list and drawings to KAGRA Dropbox
Sent draft drawings to FCL.
Plan for coming weeks
- IMMT mirror removal from IMMT chamber(1/3):
Watchdog system (Tanaka)
Past week report
Creation of extended I/O PCB(plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->Ongoing.
Examination of experimental preamplifier circuit(design)-->For measurement of background noise at KAGRA site.
Plan for coming weeks
Creation of extended I/O PCB(plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->Ongoing.
Examination of experimental preamplifier circuit(design)-->Circuit fabrication.
Other site works
- 6/5-6: Cross tube installation at IXYC (CRY)
- 6/5-6: IYC view ports installation ? (AOS)
- 6/6: EYA anchor hole drilling (CAL)
Safety
* Incidents
- Balast weight of 2.8kg dropped from the foothold. Slipped. Should not put a heavy stuff on the foot hold
- PR2: Crane cables touch the edge of the opening of the clean booth ceiling. Aso will ask Miyoki-san to fix it.
* Foreseen risks
- Type-A: Crane work
- Type-B: In chamber crane.
- Type-Bp: No heavy work
Discussion
- Preparation for the power outage on 6/19
- Shut down all the electronics by 6/16
- Close the chambers
- Aso and Ohishi will take care of the works on 6/19
- Budget for completing bKAGRA phase 3
- Contingency budget to improve the VIS or fix problems: 50MJPY
- Other suspensions (output steering mirror, OMC, etc)
- Analog electronics (interface boards etc)
VIS electronics request: https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5193
- Interface boards such as break out boxes for the BIO are not listed.
- Need to make a complete electronics diagram to identify missing parts.
Travel Plans
- Travel (Week of 6/5):
- Takahashi: 6-9
- Shoda: 6-9
- Mark: 6-9
- Fabian: 6-9
- Okutomi: 6-9
- Fujii:
- Ishizaki: 6-9
- Hirata: 6-9
- Sato: 6-9
- Enzo: 6-9
- Ohishi:
- Tanaka:
- Akiyama(Hosei): 6-9
- Hashimoto(Hosei): 5-8
- Travel (Week of 6/12):
- Takahashi: 12-16
- Shoda: 12-16
- Mark: 12-16
- Fabian: 12-16
- Okutomi: 12-16
- Fujii:
- Ishizaki: CAD work in Mitaka
- Hirata: 12-16
- Sato: 12-16
- Enzo: 12-16
- Ohishi:
- Tanaka:
- Akiyama(Hosei): 13-16
- Hashimoto(Hosei): 12-15
Next meeting
On 2017/6/9(Fri)
Next F2F: 6/30(Fri)