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Size: 3597
Comment:
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Size: 3170
Comment:
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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. Enzo set the phases and gains on the LVDT drivers for both 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 and arranged for Ishizaki-san to take it to Mitaka for soaking off of 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 * -- * SR2 TFs and control loop development (Shoda-san and Enzo). * Assemble four geophone pods (Fujii-kun and Kozu-kun at Kamioka). * Make two sets of IM OSEMs (Shoda-san and Enzo) * Make last in-air pico adapter cable (Enzo). * Make three in-air stepper splitter cables for SR2, SR3 and SRM (Enzo). * Set up dummy BS prism removal (Hirata-san). |
BFs: |
| Line 30: | Line 10: |
| ==== Plan for week of 3/26 ==== * Mark vacation. |
* BF No. 1: * Fujii-san finished tuning. Optimal load: 52.15[kg]. Resonance frequency: 0.37[Hz]. Optimal height: 64.7[mm]. * We wired the LVDT, Picomotor and Steppermotor. * We measured the keystone tilt at different points and the diferences are within 0.1[mm] * We added cable clamps to the base. * BF No.7: * Tanioka-san and Fujii-san replaced the blades corresponding to the BS for the SR type blades. * The yoke position was corrected. * The fishing rod was assembled. * Compression tuning is ongoing.?? 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 250[g]. The cap didn't came out smoothly. * We measured the keystone tilt at different points, and the diferences are within 0.1[mm] (65.5, 65.5, 65.5, 65.4) * 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 different points, and the diferences are within 0.3[mm] (63.7, 63.5,63.8, 63.8) SR2/SR3/SRM: * Kozu-kun and Enzo finished the SR3 in-air cabling. * Enzo prepared the SR3 and SRM rack in parallel (On going). * We got new power supply for the SR2 Rack. Before, the power was coming from the BS rack. BS: * Kozu-kun and Enzo helped Enomoto-san troubleshooting the BS Oplev issue (On going). Shipping: * We received the LBB parts for SR2. * We received the Payload parts (IM and IRM) this morning. ==== Plan for week of 4/2 ==== * Mark at Mitaka Mon, Kamioka from Tue. |
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| * Lay SR3 in-air cabling (Enzo +1). * Finish rebuild of second BF (Hirata-san). * SF Check (Hirata-san). * 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. |
* Finish BFs tasks (cabling +calibration) * Finish SFs tasks (cabling +calibration) * Add cable clamps to bases. * Add cable clamps and Cu segments to caps (only if they fit well). * Build 2xIM, 2xIRM * Glue SR3 mirror? ==== Plan for week of 4/9 ==== * Shoda-san at Mitaka * Fujii-san at Mitaka * Tanioka-san at Mitaka? * Others at Kamioka * -- * Finish IMs and IRMs * Build 1xRM * Glue SR3 mirror? ==== Plan for week of 4/16 ==== * Shoda-san at Mitaka * Fujii-san at Mitaka * Tanioka-san at Mitaka? * Others at Kamioka * -- * Start SR3 Hang? ==== Plan for week of 4/23 ==== * Shoda-san at Mitaka * Fujii-san at Mitaka? * Tanioka-san at Mitaka? * Others at Kamioka * -- * F0 blade prototype test ==== Plan for week of 4/30 ==== * Golden Week! |
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. Optimal load: 52.15[kg]. Resonance frequency: 0.37[Hz]. Optimal height: 64.7[mm].
- We wired the LVDT, Picomotor and Steppermotor.
- We measured the keystone tilt at different points and the diferences are within 0.1[mm]
- We added cable clamps to the base.
- BF No.7:
- Tanioka-san and Fujii-san replaced the blades corresponding to the BS for the SR type blades.
- The yoke position was corrected.
- The fishing rod was assembled.
- Compression tuning is ongoing.??
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 250[g]. The cap didn't came out smoothly.
- We measured the keystone tilt at different points, and the diferences are within 0.1[mm] (65.5, 65.5, 65.5, 65.4)
- 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 different points, and the diferences are within 0.3[mm] (63.7, 63.5,63.8, 63.8)
SR2/SR3/SRM:
- Kozu-kun and Enzo finished the SR3 in-air cabling.
- Enzo prepared the SR3 and SRM rack in parallel (On going).
- We got new power supply for the SR2 Rack. Before, the power was coming from the BS rack.
BS:
- Kozu-kun and Enzo helped Enomoto-san troubleshooting the BS Oplev issue (On going).
Shipping:
- We received the LBB parts for SR2.
- We received the Payload parts (IM and IRM) this morning.
Plan for week of 4/2
- Mark at Mitaka Mon, Kamioka from Tue.
- Shoda-san at Mitaka
- Others at Kamioka
- --
- Finish BFs tasks (cabling +calibration)
- Finish SFs tasks (cabling +calibration)
- Add cable clamps to bases.
- Add cable clamps and Cu segments to caps (only if they fit well).
- Build 2xIM, 2xIRM
- Glue SR3 mirror?
Plan for week of 4/9
- Shoda-san at Mitaka
- Fujii-san at Mitaka
- Tanioka-san at Mitaka?
- Others at Kamioka
- --
- Finish IMs and IRMs
- Build 1xRM
- Glue SR3 mirror?
Plan for week of 4/16
- Shoda-san at Mitaka
- Fujii-san at Mitaka
- Tanioka-san at Mitaka?
- Others at Kamioka
- --
- Start SR3 Hang?
Plan for week of 4/23
- Shoda-san at Mitaka
- Fujii-san at Mitaka?
- Tanioka-san at Mitaka?
- Others at Kamioka
- --
- 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).