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| * Activity report for weeks of 12/26 and 1/2 | === Type B (Mark) === ==== Report for week of 3/5 ==== * Mark finished -v2 of the schedule ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779| L1807779]]). * We removed the non-vacuum-compatible ballast mass from the BS tank. * We secured all the PR2 feedthrough connections with screws. * We grabbed an extra empty rack for SRM and set it up next to the one for SR3 (we will add boxes next week). * We calibrated the SR2 SF LVDT sensing and actuation, and the FR. * We measured the bounce frequencies of the SF with and without the cap, and the bounce frequency of the BF. * We put the SF cap on and lifted and weighed the SF/... section. * However we were unhappy with how the cap had to be forced on and off and how it lowered the load capacity (≈-433 g) and resonance frequency (0.271 Hz-> 0.23 Hz). * We tried the cap left over from B2-3 used in one of the PRs, which was slightly better but still not great. * We measured diameter of the original cap (B2-2) and the new one (B2-3). The original cap was almost exactly 700 mm in internal diameter, and the new one was about 0.2 mm wider. * We moved the filter building bench and tools into the SRM area and started the rebuild of the two remaining BFs (the one from the BS Test Hang and the one with the tilted keystone). * Mark worked on slides for the ASJ and LVC meetings. * The SRM mushroom work was postponed due to other demands on the time of Sawada-san-tachi and Mirapro. |
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| * Hirata-san: * Modified parts list and screw list for payload. * Sent lists to i-ject and asked for preliminary quotes. * Made drawings for some jigs (PR hold-down jig) and some parts for payload (PR/SR wire clamps with disposable jaw pieces - improved version with disposable pieces in both primary and secondary clamps). * For Type Bp: * Searched for PR gluing jigs. * Washed and assembled recoilmass base for mirror hanging jigs, and sent them to Kamioka. * Washed additional masses for IM and sent them to Kamioka. * For others: * Washed IMMT plate and sent them to Kamioka. * Fabian * Designed a pull down system to fix the PR IM to the EQ stop (similar to the SR one). * Worked on design of the SR assembly frame. As hoped, the SR version can be almost identical to the BS version. * Worked on design of additional trim mass (≈18 kg) for the BS BF. * Checked assembly PR/SR drawings. There were a few corrections/changes. * Checked fastener list. There were few corrections/changes. * Checked component list for the manufacture order. There were few corrections/changes. * Helped in searching for the PR gluing jigs. * Mark * Started design of SR assembly frame (but then passed it to Fabian). * Worked on task lists and schedule. * Plan for 1/10-13 * Mark and Fabian at Kamioka: * Finish rebalance of IM * Reinstall IRM, adjust OSEMs * Replace broken Type 3 cable. * Do TFs from IRM OSEMs to IRM and IM OSEMs. * Cable up and test BF LVDT and fishing rod (time permitting). * Disconnect BF and ship back to Mitaka (time permitting). * Hirata-san: * More SR procurement. |
==== Plan for week of 3/12 ==== * Shoda-san at Mitaka. * Mark at ASJ (Chiba) Fri, then Mitaka. * Others Kamioka Mon-Thu * F2F VIS Meeting and Farewell Party for Fabian at Mitaka on Friday. * -- * Install boxes in SR3 and SRM racks. * Lay SR3 in-air cabling. * Continue rebuild of BFs. * Ship dummy BS to Mitaka. ==== Plan for week of 3/19 ==== * Fujii-kun and Tanioka-kun join. * Mark at LVC meeting * Fujii-kun at Kamioka * 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. ==== Plan for week of 3/26 ==== * Mark vacation. * Shoda-san at Mitaka * Others at Kamioka * -- * 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. ==== To-Do Lists, Schedule ==== * [[KAGRA/Subgroups/VIS/TypeB/March2018]] * [[KAGRA/Subgroups/VIS/TypeB/April2018]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]] ==== Vacation Info ==== * Mark at LVC, then vacation, 3/18 (Sun) - 4/1 (Sun) * Hirata-san vacation, Mon 3/5. * Fabian vacation, 3/26-4/27 (then gone). |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 3/5
Mark finished -v2 of the schedule (L1807779).
- We removed the non-vacuum-compatible ballast mass from the BS tank.
- We secured all the PR2 feedthrough connections with screws.
- We grabbed an extra empty rack for SRM and set it up next to the one for SR3 (we will add boxes next week).
- We calibrated the SR2 SF LVDT sensing and actuation, and the FR.
- We measured the bounce frequencies of the SF with and without the cap, and the bounce frequency of the BF.
- We put the SF cap on and lifted and weighed the SF/... section.
However we were unhappy with how the cap had to be forced on and off and how it lowered the load capacity (≈-433 g) and resonance frequency (0.271 Hz-> 0.23 Hz).
- We tried the cap left over from B2-3 used in one of the PRs, which was slightly better but still not great.
- We measured diameter of the original cap (B2-2) and the new one (B2-3). The original cap was almost exactly 700 mm in internal diameter, and the new one was about 0.2 mm wider.
- We moved the filter building bench and tools into the SRM area and started the rebuild of the two remaining BFs (the one from the BS Test Hang and the one with the tilted keystone).
- Mark worked on slides for the ASJ and LVC meetings.
- The SRM mushroom work was postponed due to other demands on the time of Sawada-san-tachi and Mirapro.
Plan for week of 3/12
- Shoda-san at Mitaka.
- Mark at ASJ (Chiba) Fri, then Mitaka.
- Others Kamioka Mon-Thu
- F2F VIS Meeting and Farewell Party for Fabian at Mitaka on Friday.
- --
- Install boxes in SR3 and SRM racks.
- Lay SR3 in-air cabling.
- Continue rebuild of BFs.
- Ship dummy BS to Mitaka.
Plan for week of 3/19
- Fujii-kun and Tanioka-kun join.
- Mark at LVC meeting
- Fujii-kun at Kamioka
- 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.
Plan for week of 3/26
- Mark vacation.
- Shoda-san at Mitaka
- Others at Kamioka
- --
- 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.
To-Do Lists, Schedule
Vacation Info
- Mark at LVC, then vacation, 3/18 (Sun) - 4/1 (Sun)
- Hirata-san vacation, Mon 3/5.
- Fabian vacation, 3/26-4/27 (then gone).