Agenda/Minutes of the VIS Meeting on 2018/10/19
2018/10/19 13:30 - 14:50
Participants:Mark, Okutomi, Takahashi, Aso, Ohishi, Enzo, Sato, Hirata, Fabian, Fujii, Lucia
Progress report
Schedule Chart
Type-A : (PDF/MPP)
Type-B: (PDF/MPP)
Type-C: (XLSX)
Type-A (Takahashi)
Past week report
[X-front]
- Corrected the tilt of IP base by jack up/down of the corn bellows.
- Adjusted the position of IP by the stepping motors.
- Aligned the TM by the yaw picomoter in the BF.
[X-end]
- Corrected the tilt of IP base by jack up/down of the corn bellows.
- It was difficult to adjust the position of IP by the stepping motors due to the tight stopper setting.
- Vented the EXV chamber and open the top chamber.
- Released the stopper for IP more.
- Adjusted the position of IP by hand/stepping motors.
- Aligned the TM by the yaw picomoter in the BF.
- Closed the top chamber and started the evacuation.
- Followed the drift of IP position by the stepping motors during the evacuation.
[Y-front]
- Investigated the 70Hz peak in the spectrum of IP LVDTs. Changed the modulation frequency from 10,000Hz to 10,003Hz.
- Designing the yaw stepping motor mechanism. We need to procure 4 more motors.
Plan for coming weeks
[Y-front]
- Replacement of the FR parts for BF. (10/22, 23)
[Y-end]
- Assembly of the geophone pods and installation. (10/24)
Type B (Mark)
Report for week of 10/15
SRM
- We received the fourth feedthrough we had been waiting for and installed it on the AF.
- Fabian added the cables between the FE computer and the ADC/DAC boxes, and we checked that we were getting IO in the real-time model.
- Fabian and Enzo connected up the Sat Amps.
- Fabian double-checked the optic pitch, got the IRM nicely aligned to the IM, cabled IM OSEMs V1, V2, V3 and H1, and adjusted those OSEMs in/out to midrange.
Hirata-san set the compression on the F0 to 30 mm and measured the height and frequency as a function of load. He then fixed a loose screw on one of the blade tips and repeated the measurement. The frequency was fairly constant at around 0.5, which will do. He did a mass budget and chose a F1 CuBe spring. We may do a tiny bit more compression if the frequency degrades, and/or choose an even stronger spring if the load capacity is not enough.
- Hirata-san took apart and reassembled one of the LBB blade units, which had a badly seated blade.
- Hirata-san put cable clamps on the SF and on the PI. We are very short on the PEEK clamp pieces, so he scavenged some from SR2.
- We added a new LAN hub for SRM, and configured two stepper drivers as SRM_IP and SRM_GAS.
- Late in the week we received extra Type 3-4 cables (thanks to Sato-san for expediting) and were able to cable IM OSEMs H2 and H3, and the BF LVDT.
- Enzo made a new batch of feedthrough adapters.
SR2
- We finalized the geophone cabling and reinstalled the geophones.
- We received the new arc weights, and used some of them to install a basic allotment of 6 38-mm weights on SR3 per the CAD. We then added two extra 19-mm arc weights for tuning and got a good IP frequency of 0.133 Hz.
- Apart from the F0 yaw stepper issue and the OL, the SR2 is now more-or-less complete and adjusted mechanically, and just needs software work (control loops etc). We will however have to borrow one of the geophones at some point to do a huddle test with the final batch of new geophones (including those for SRM). Terrence can set up the OL in the week of 10/29.
Plan for week of 10/22
- Friday is NAOJ Open Day Prep - no Kamioka work.
- Mark, Hirata-san and Fabian at Kamioka Mon-Thu.
- Enzo at Kamioka Tue-Thu.
SR2
- Monitor disassembly of SR2 AF.
- Do a measurement of how much torque is required on the F0 keystone to move the system in yaw. (This will help Sato-san choose a suitable stepper driver for the new design.)
- Continue shakedown.
- Gather parts for the OL (with help from Simon).
SRM
- Get optical table from SR2 AF moved to near SR3 and move cables in preparation for geophone test.
- Scavenge HPCDs from SR2 and SR3 (currently we only have one for SRM) and organize to get LPCDs modified.
- Suspend/weigh/balance the BF/... section.
- Build up the AF and SS to the SF level.
- Install the SF.
Plan for week of 10/29
- Mark, Enzo, Hirata-san, Fabian and Terrence at Kamioka Mon-Fri.
SR2
- Set up OL.
SRM
- Continue assembly.
To-Do Lists, Schedule
Vacation/Visitor Info
- Terrence: 10/29-11/2 at Kamioka.
Type-Bp (Shoda)
Past week report
- Vertical DC control for all the GAS filters have been implemented
- PRM LVDTs have much larger coupling from the actuation signal at high frequencies compared with the situation before the black out
Plan for coming weeks
OMMT & OSTM (Ohishi)
Past week report
- Delivered mechanical parts were almost assembled.
- Did cabling from rack to satellite box, and inside chamber.
- Mirapro adjusted breadboard level in the vacuum chamber.
- OMC was installed by TITech people.
Plan for coming weeks
- glue magnets and standoff of OMMT1.
- cabling (Make flipper, and pico-motor cables)
- hang OMMT1 mirror from IM.
- Kaihatsu? or Kaihotsu san will come from Toyama University from Tue to Fri.
VIS electronics (Tanaka)
Past week report
Plan for coming weeks
Other site works
Safety
- Incidents: no issue
- Foreseen risks
- Type-A: No crane work
- Type-B: Crane work
Discussion
Type-A
- Postpone the installation of geophones to ETMY until later half of November
Type-B
- We need 4 more long cables
- The delivery of new cable material will be too late (late November)
- We will connect shorter cables with soldering
- Insulation with PEEK heat shrink tubes or Kapton sheets
- Use vacseal to reinforce the connection
Travel Plans
- Travel (Week of 10/22):
- Takahashi: 22-24
- Okutomi:
- Sato: 22-24
- Lucia: 22-26
Fabian:22-26
- Mark: 22-25
- Hirata: 22-25
Enzo:23-25
- Shoda:
- Ohishi:
- Fujii:
- Tanioka:
- Tanaka:
- Kozu (ICRR):
- Arai (ICRR):
- Travel (Week of 10/29):
- Takahashi: 30 - 2
- Okutomi:
- Sato:
- Lucia: 29 - 2
- Fabian: 29 - 2
- Mark: 29 - 2
- Hirata: 29 - 2
- Enzo: 29 - 2
- Shoda:
- Ohishi:
- Fujii: 29 - 2
- Tanioka:
- Tanaka:
- Terrence: 29 - 2
- Kozu (ICRR):
- Arai (ICRR):
Next meeting
On 2018/11/2(Fri)