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| Deletions are marked like this. | Additions are marked like this. |
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| ==== Report for week of 3/12 ==== * We helped Mirapro close up the BS tank, and did last minute checks and adjustments, including using the fishing rods to reset the GAS keystones to mid-range according to the LVDTs. (The F0 had risen so far (≈7 mm) due to temperature changes that it was touching the upper keystone stop screws and defeating the vibration isolation. We operated the F0 FR manually while the tank lid was off.) * We installed electronic boxes in the SR3 and SRM racks. Rack internal cabling and in-air cabling to SR3 still needs to be done. * Hirata-san disassembled two BFs (one SF BF with a tilted keystone and the BS Test Hang BF) and characterized all 10 available SR BF blades. He found they fell into a group of 6 strong ones and a group of 4 weak ones, so he divided the 6 into two matched sets and rebuilt the two filters. * We noticed that the bottom level of SR2 suspension had developed a significant yaw (enough to foul on the security structure), probably introduced when we picked the chain up to weigh it, so we lifted the suspension again and corrected it. * We aligned the SR2 ready for TFs. We noticed that the IM/... section had a noticeable roll (≈20 mrad) but we were unable to correct it with the IM roll pico (the pico runs but the roll does not change, probably because there is too much friction for the mass return spring). We will see if the TFs look OK and then decide whether to try correcting the roll. * We gathered items for OSEM assembly by Enzo, Shoda-san and others at Mitaka next week, and for geophone assembly by Fujii-kun and Kozu-kun at Kamioka. Hirata-san ordered some M8x35 screws that we didn't have enough of. * We took delivery of the blade bases for the LBB dampers. * Hirata-san packed up two SF caps (the original one from the SR2 SF) and a spare, for remachining by Mirapro. He also packed up the dummy BS for shipment to Mitaka for soaking off the sapphire prisms. |
==== Report for week of 3/26 ==== |
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| ==== Plan for week of 3/19 ==== * Fujii-kun and Tanioka-kun join. * Mark at LVC meeting * Fujii-kun at Kamioka (including Wed 3/21) * Kozu-kun at Kamioka Mon-Tue. * All others at Mitaka * -- * Put four geophones in pods. * Make two sets of IM OSEMs * Make last in-air pico adapter cable * Make three in-air stepper splitter cables for SR2, SR3 and SRM. * Set up Dummy BS prism removal. |
BFs: |
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| ==== Plan for week of 3/26 ==== * Mark vacation. |
* BF No. 1: * Fujii-san finished tuning. * Enzo wired the LVDT, Picomotor and Steppermotor. * We measured the keystone tilt at 4 different points and it was at 65.5, 65.5, 65.5 and 65.5. So with the differences of 0.1 mm we think we can tolarate this differences. * We added cable clamps to the base. * BF No.7: * Fujii-san disassemble the blades corresponding to the BS and we assemble the SR type blades. SFs: * Hirata-san and Tanioka-san set up the frame to check the SFs. * SF (B2-5): * Hirata-san, Fujii-san and Tanioka-san checked the optimal load with and without cap. The optimal load changes about 200[g]. * We measured the keystone tilt at x points: 65.5mm, 65.5mm, 65.5mm, and 65.5mm. * SF (B2-6): * Hirata-san, Fujii-san and Tanioka-san checked the optimal load with and without cap (On going?). * We measured the keystone tilt at x points: 65.5mm, 65.5mm, 65.5mm, and 65.5mm. SR3/SRM: * Kozu-kun and Enzo finished the SR3 in-air cabling. * Enzo prepared the SR3 and SRM rack in parallel (On going). BS: * Kozu-kun and Enzo helped Enomoto-san troubleshooting the BS Oplev issue (On going). Others: * We finished tuning of BF No. 1. * We wired the LVDT, Picomotor and StepperMotor of BF No. 1. * We finished tuning of BF No. 7. * We wired the LVDT, Picomotor and StepperMotor of BF No. 7. * SF check (Hirata-san++). * We checked the load capacity with and without the cap. * We checked fit of caps. For the SF No. * Add cable clamps to bases. * Add cable clamps and Cu segments to caps (only if they fit well). * Cable LVDTs and steppers. * We finished the SR3 in-air cabling. ==== Plan for week of 4/2 ==== * Mark at Mitaka Mon, Kamioka from Tue. |
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| * Lay SR3 in-air cabling. * Finish rebuild of second BF. * SF Check * Check load capacity. * Check fit of caps. * Add cable clamps to bases. * Add cable clamps and Cu segments to caps (only if they fit well). * Cable LVDTs and steppers. |
* Glue SR3 (if available) * Build 2xIM, 2xIRM (if parts available - due 3/30) ==== Plan for week of 4/9 ==== * Shoda-san at Mitaka * Others at Kamioka * -- * Finish IMs and IRMs * Build 1xRM ==== Plan for week of 4/16 ==== * Start SR3 Hang? ==== Plan for week of 4/23 ==== * F0 blade prototype test ==== Plan for week of 4/30 ==== * Golden Week! |
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| * Hirata-san vacation, Mon 3/5. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 3/26
BFs:
- BF No. 1:
- Fujii-san finished tuning.
- Enzo wired the LVDT, Picomotor and Steppermotor.
- We measured the keystone tilt at 4 different points and it was at 65.5, 65.5, 65.5 and 65.5.
- So with the differences of 0.1 mm we think we can tolarate this differences.
- We added cable clamps to the base.
- BF No.7:
- Fujii-san disassemble the blades corresponding to the BS and we assemble the SR type blades.
SFs:
- Hirata-san and Tanioka-san set up the frame to check the SFs.
- SF (B2-5):
- Hirata-san, Fujii-san and Tanioka-san checked the optimal load with and without cap. The optimal load changes about 200[g].
- We measured the keystone tilt at x points: 65.5mm, 65.5mm, 65.5mm, and 65.5mm.
- SF (B2-6):
- Hirata-san, Fujii-san and Tanioka-san checked the optimal load with and without cap (On going?).
- We measured the keystone tilt at x points: 65.5mm, 65.5mm, 65.5mm, and 65.5mm.
SR3/SRM:
- Kozu-kun and Enzo finished the SR3 in-air cabling.
- Enzo prepared the SR3 and SRM rack in parallel (On going).
BS:
- Kozu-kun and Enzo helped Enomoto-san troubleshooting the BS Oplev issue (On going).
Others:
- We finished tuning of BF No. 1.
We wired the LVDT, Picomotor and StepperMotor of BF No. 1.
- We finished tuning of BF No. 7.
We wired the LVDT, Picomotor and StepperMotor of BF No. 7.
- SF check (Hirata-san++).
- We checked the load capacity with and without the cap.
- We checked fit of caps. For the SF No.
- Add cable clamps to bases.
- Add cable clamps and Cu segments to caps (only if they fit well).
- Cable LVDTs and steppers.
- We finished the SR3 in-air cabling.
Plan for week of 4/2
- Mark at Mitaka Mon, Kamioka from Tue.
- Shoda-san at Mitaka
- Others at Kamioka
- --
- Glue SR3 (if available)
- Build 2xIM, 2xIRM (if parts available - due 3/30)
Plan for week of 4/9
- Shoda-san at Mitaka
- Others at Kamioka
- --
- Finish IMs and IRMs
- Build 1xRM
Plan for week of 4/16
- Start SR3 Hang?
Plan for week of 4/23
- F0 blade prototype test
Plan for week of 4/30
- Golden Week!
To-Do Lists, Schedule
Vacation Info
- Mark at LVC, then vacation, 3/18 (Sun) - 4/1 (Sun)
- Fabian vacation, 3/26-4/27 (then gone).