Agenda/Minutes of the VIS Meeting on 2017/9/29
2017/9/29 13:30 - 14:45
Participants: Okutomi, Aso, Mark, Takahashi, Shoda, Fabian, Sato, Ishizaki, Fujii, Simon, Tanaka, Hirata, Raffaele
Progress report
Schedule Chart
- Type-A: Will finish on Oct. 13
- Type-B: Will start the SR3 installation from Dec.
- Type-Bp: post installation tuning phase
Type-A (Takahashi)
Past week report
[X-end]
25th(Mon)
- Continued the cabling from the F1 to the top ring.
- Put the pre-isolator on the bridge frame and suspended the F1 from the TF.
- Adjusted the tilt of F1 by counter weights.
26th(Tue)
- Calibrated the LVDT in the TF.
- Lifted down the F1 onto the release sensor.
- Unhooked the wire by removing the yoke at the bottom of TF.
- Dismounted the bridge frame from the foothold.
27th(Wed)
- Transported the geophones and the ACCs to the X-end.
- Made geophone cables and connected the geohone pod to the circuit.
28th(Thu)
- Evaluated the geophone with pod for vertical.
- Mounted the geophone pod at the bottom of dummy payload with lifting down the EQ stop.
- Set the top ring on the frame lock.
29nd(Fri)
Plan for coming weeks
- Install the pre-isolaotr into the chamber on 2nd.
- Tune the IP.
- Set the BF damper.
Type B (Mark)
Past week report
At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun):
- We moved all the in-air cables over to the tank.
- We plugged all the in-air and in-vacuum cables into the feedthroughs and checked that we got signals from all the output channels (actuation not yet tested). We had to work around a snag with the new F-F gender changers that replace many Type 1 and Type 2 cables: like the vacuum feedthroughs, they flip pins 1 and 5. Electrically they could just be omitted, but the in-air cables don't plug directly into the feedthroughs very well, so we made up some non-flipping adapters similar to the anti-feedthrough adapters.
- Hirata-san fixed a problem with one of the rods supporting the LBB Cu ring, where the head was not seating in the receptacle at the bottom. The head was slightly bent so he just reinstalled the rod upside-down to move the bent head to a less critical spot. (This also establishes that it's possible to install the rods later if we need to, although it's more convenient to bring them in with the suspension on the crane as we've been doing it.)
- We suspended the LBB. Per a request from Akutsu-san, we set it as high as we easily could. We decided to try for 30 mm higher than in the CAD, for a height of 367 (instead of 397) mm for the beam line above the LBB. 40 mm would also be doable, but any more would need new rods, and more than ≈100 mm would cause the LBB to hit the bottom of the security structure.
- We moved a lot of stuff out of the +X side of the cleanbooth to behind SRM, so that Mirapro could connect the section of beam duct between the BS tank and the X arm. They put the new section in position but have not connected it up yet. They also did preparation for cutting the SR2 crane slot next week.
- Hirata-san worked with Mirapro to get the SR assembly frame assembled in the SR3 area. (Insertion of the LBB and installation of the top of the tank is planned for 10/18-20.)
- We investigated a problem with the IM OSEM readings, which were far from mid-range. Although Fabian and Ohishi-san got the payload hanging nicely on Thu 9/21, sometime between then and when we plugged the OSEMs back in on 9/28, the BF and IRM apparently tipped considerably (with the +X corner high) so that the H2 and H3 OSEM flags are fouling on the bottom and top of their respective OSEMs.
- We took the service ports off the BF tank at the BF level and tried correcting the tilt by moving the sliding masses around, but to no avail. Finally Hirata-san solved it by noticing that one of the BF-IRM rods was not seated properly at the top. Because it had been correct, and couldn't have fallen upwards, it must have gotten knocked during the LBB adjustment work. We locked the BF temporarily, lifted the corner of the IRM and jiggled the rod. It fell back into place and the alignment was much better. We backed out the sliding mass adjustments and it was back to normal.
Plan for week of 10/2
Kamioka: Mark, Enzo (Tue-Fri), Ohishi-san, Kozu-kun.
- Finish preparation for SR2 work.
- Debug electronics, especially actuation.
- Tune IP, do LVDT/stepper calibration.
- Remove First Contact, try OL.
Mitaka: Fabian, Hirata-san
- Design ballast for LBB.
- Design improved PI yaw adjustment.
- SR procurement.
Plan for week of 10/10
Holiday Mon 10/9, Open Day prep Fri 10/13.
- TFs, final preparation for alignment in week of 10/16.
Plan for week of 10/16
Kamioka: all but Mark
- Work with alignment team.
Vacation Info
Mark: 10/16-24
Type-Bp (Shoda)
Past week report
- PRM 3D CAD including the vacuum tank and inner frame is ready.
Plan for coming weeks
- Check connection of PRM
- Remove all the FC
- PRM tuning (if possible)
OMMT & OSTM (Ohishi)
Past week report
Plan for coming weeks
Watchdog system (Tanaka)
Past week report
I held a meeting to make estimates with several vendors.-->Price negotiation faileｄ.Because the assumed price is too low(The estimate of the manufacturing cost of the chassis was higher than expected).
(Current assumed price about 900,000 yen -->Vendor's quotation price about 2,000,000 yen)
-->A different vendor submitted a quotation(It fits in the planned price). -->I also requested a new vendor to make a quote.
Waiting for concrete information on installation location.The type(High power,Low power)and number actually needed,and the peripheral equipment accompanying it.-->Placement plan for installing WDS in KAGRAJGW-E1707265(PDF).
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(mechanical design).
Execution of the final version operation test for mass production ->Detailed exam(Ongoing).
Other site works
- BS duct connection: Oct 2 - 6
- End of Aug. to Nov.: Mozumi entrance will be closed
Safety
- Incidents: no incident
- Foreseen risks
- Type-A: Crane work
- Type-B: Crane work
- Type-Bp: Crane work
Discussion
Plan for the coming months
Travel Plans
- Travel (Week of 10/2):
- Takahashi: 2-6
- Okutomi: 2-6
- Sato: 2-6
- Ishizaki: 2-6
- Mark: 2-6
- Fabian:
- Hirata:
- Enzo: 3-6
- Shoda: 2-6
- Ohishi:
- Fujii:
- Tanaka:
- Kozu (ICRR): 2-6
- Arai (ICRR): 2-6
- Travel (Week of 10/9):
- Takahashi: 10-??
- Okutomi: 10-??
- Sato: 10-??
- Ishizaki: 10-??
- Mark:
- Fabian:
- Hirata:
- Enzo:
- Shoda:
- Ohishi:
- Fujii:
- Tanaka:
- Kozu (ICRR): ??
- Arai (ICRR): ??
Next meeting
On 2017/10/6(Fri)