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| * Type B Past Week Summary * Mark and Fabian worked at Kamioka with Fujii-san: * We attempted to measure the tilt sensitivity of the accelerometers by adding shims under the legs but gave up when we discovered that picking up and putting down the accelerometer perturbs the zero point even without shims. We will probably need a special tilt stage to do this properly. * We took some frequency and Q measurements. The results were amplitude dependent. Joris thinks that this is due to not operating the accelerometers close enough to zero DC output. * We set up for a test of the geophone noise. One geophone is reading half the output of the others - one of the adapter cables is broken. * Hirata-san: * Received extra compensation masses and washed them. * Received PI guides, assembled them and shipped them to Kamioka. * Received backup set of pillar for security structure (with M10 instead of M12 holes at top). * Removed adhesive from base of BS flags in preparation for regluing. * Did assembly drawings for cable clamps and other add-on parts for BF and SF. * Type B ongoing issues * Wires * Need to decide RM wire thickness and order BS and RM wires. Lead time is a few days from Nilaco. * OSEMs * Akutsu-san is working to get wide-mouth OSEMs * Longer cables for BF->PI and SF->PI. * Connectors RECEIVED, cables being made. * Feedthrough Adapters * Connectors RECEIVED. * SR machining test ONGOING. * Installation stuff * "Ceiling" work in BS clean booth (removal of second floor section) scheduled for Fri 7/1. * Assembly frame construction scheduled for 7/4 * Ballast masses for payload * Initial batch received - ordered extra smaller ones to allow for adjustments. * Lower breadboard stuff * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss. * Breadboard springs (in manufacture, expected end of July) * Nail-head parts - ordered with assembly frame, will arrive next week. * Documents * BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] |
=== Type B (Mark) === ==== Report for week of 11/12 ==== * BS * Kozu-kun noticed the BS OL was out of range, and Fabian and Fujii-kun investigated. It turns out that the temperature has risen by over 2°C, so all the GAS filters have sagged and several stages are touching. Miyoki-san and Furuta-san are looking at what can be done. * SRM * We did the vertical height survey and found that as with SR2 and SR3, the chain is longer than the CAD, this time by ≈7 mm, and again mostly between the SF and BF. * The final SRM small glass mirror became available, so we had Hirose-san ship it to us so we can install it while the suspension is still on the assembly frame. Hirata-san ordered shims to make up the new recommended thickness of 1.4 mm and a micrometer to check the combination, which should arrive on Monday 11/26. * SR2 * ==== To-Do Lists, Schedule ==== * [[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 Type B Schedule (SR)]] ==== Plan for week of 11/19 ==== * Friday 11/23 is Labor Thanksgiving Day. * Mark, Enzo and Fabian at Kamioka Mon-Thu. * Hirata-san at Kamioka Tue-Thu (Mitaka on Mon for Engineering Promotion Office meeting). ===== SRM ===== * Go/no-go test of all electronics items, especially SF/... section. * Finish vertical height check and adjust SF trim mass as required. * Unlock IP and center roughly. * Check/adjust alignment of SS. * Calibrate IP LVDTs. * Add arc weights and geophones. * Improve centering/tuning of IP and SS alignment. * Disconnect cables at feedthroughs, lock suspension. * Crane into tank. ===== SR2 ===== * Assist MIF team with pico cables and LBB breadboard ballast. * Install SR2 OL pillar and shelf (with AOL supervision)? ==== Plan for week of 11/26 ==== * Move SRM in-air cables over to tank. * Remove First Contact. * Unlock and align SRM. * Hook and roughly ballast LBB. ==== Plan for week of 12/3 ==== * f2f Meeting at NAOJ - no Kamioka work. ==== Vacation/Event Info ==== * Hirata-san at Mitaka, Mon 11/19 (Engineering Promotion Office meeting). |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 11/12
- BS
- Kozu-kun noticed the BS OL was out of range, and Fabian and Fujii-kun investigated. It turns out that the temperature has risen by over 2°C, so all the GAS filters have sagged and several stages are touching. Miyoki-san and Furuta-san are looking at what can be done.
- SRM
- We did the vertical height survey and found that as with SR2 and SR3, the chain is longer than the CAD, this time by ≈7 mm, and again mostly between the SF and BF.
- The final SRM small glass mirror became available, so we had Hirose-san ship it to us so we can install it while the suspension is still on the assembly frame. Hirata-san ordered shims to make up the new recommended thickness of 1.4 mm and a micrometer to check the combination, which should arrive on Monday 11/26.
- SR2
To-Do Lists, Schedule
Plan for week of 11/19
- Friday 11/23 is Labor Thanksgiving Day.
- Mark, Enzo and Fabian at Kamioka Mon-Thu.
- Hirata-san at Kamioka Tue-Thu (Mitaka on Mon for Engineering Promotion Office meeting).
SRM
- Go/no-go test of all electronics items, especially SF/... section.
- Finish vertical height check and adjust SF trim mass as required.
- Unlock IP and center roughly.
- Check/adjust alignment of SS.
- Calibrate IP LVDTs.
- Add arc weights and geophones.
- Improve centering/tuning of IP and SS alignment.
- Disconnect cables at feedthroughs, lock suspension.
- Crane into tank.
SR2
- Assist MIF team with pico cables and LBB breadboard ballast.
- Install SR2 OL pillar and shelf (with AOL supervision)?
Plan for week of 11/26
- Move SRM in-air cables over to tank.
- Remove First Contact.
- Unlock and align SRM.
- Hook and roughly ballast LBB.
Plan for week of 12/3
- f2f Meeting at NAOJ - no Kamioka work.
Vacation/Event Info
- Hirata-san at Mitaka, Mon 11/19 (Engineering Promotion Office meeting).