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| ==== Report for week of 5/28 ==== * Enzo tested the LVDT driver repaired by Tanaka-san - it was fine. * Fujii-kun and Enzo finished assembling a batch of 4 geophones and took test data. * Hirata-san modified some Promec masses (drilling out the threads on 2 of 4 holes) so we could use two layers of them inside the BF. * Hirata-san installed maraging rod receptacles in the LBB damper rings, and in the bottom of PIs #3 and #1 (for the SF damper rings). * After consulting with various people, Hirata-san installed the second half of the LBB top ring in the chamber, simply omitting the pillar and screw associated with the badly threaded hole. * Hirata-san took delivery of the screws for the LBB blade units, made up 9 blade units and installed 6 of them on PI #3 and #1 (for SR3 and SR2). * Hirata-san made up a set of PI cable clamps and installed them on PI #3 (for SR3). * Hirata-san removed the prototype blades from PI #3 to get ready for testing the final blades. * We located the #355 disk and #356 poles for the next level of the security structure up to the SF and installed the poles. * We installed ballast mass in the BF. After some trial and error we settled on 16 Promec masses (7.1 kg) inside the BF and 5 D1808104-4 and 3 D1808104-5 masses (540 g) on the cap. * Enzo did several rounds of TFs on the BF/... section of the suspension, and ins ==== Plan for week of 5/28 ==== * Mark, Enzo at Kamioka Mon-Fri. * Hirata-san at Kamioka Tue-Fri. (Mon is monthly Mitaka day.) * Matteo at Kamioka from Tue. He may help Type B to get experience. * Kozu-kun at Kamioka Mon only. (Rest of week is job interviews.) * -- * Hirata-san will modify and clean some Promec masses at Mitaka (making threaded holes unthreaded to allow stacking). * Cable and test BF cap picos. * Install internal ballast masses. * Install cap ballast masses. * Build up security structure to SF level. * Crane in SF and remove cap. * Hook BF and adjust total ballast. * Route cables through SF-BF flying saucer up to bottom of SF. * Adjust BF trim mass. ==== Plan for week of 6/4 ==== * Mark, Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri. (Mon is NAOJ medical checkup.) * -- * Readjust payload. * Take TFs. * Add budgeted ballast mass to SF. * Cable, test SF LVDT and FR. * Characterize final F0 blades. * Finish four half-assembled geophones. ==== Plan for week of 6/11 ==== * Mark Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri (Mon is compensation day for f2f.) * -- * Rebuild F0 #3 for SR3. * Park F0 #1 (for SR2) in top of SR3 assembly frame. * Move F0 #3 behind SR3. * Make LBB blade sets (or at least 3 of 9). |
==== Report for week of 11/19 ==== * SRM * We locked the suspension and craned it into the tank. This is the last Type B tank installation! * While inspecting the O-ring between the service ring and the lower section of the tank, Hirata-san found a small nick, so he replaced it. (This will hopefully be the last time that flange is closed, so it needs to be left ready for Mirapro to tighten.) * Hirata-san and Fabian removed the First Contact, but found that a tiny piece was left behind. With advice from Hirose-san, they managed to remove it via several rounds of dabbing with an acetone-soaked lens tissue. * They removed the IM-RM safety bar, unlocked the lower half of the suspension, and got it reasonably well aligned by eye. * They moved the vacuum feedthroughs and in-air cabling over, and reconnected nearly all the electronics. (The in-air cabling will need some tidying later, but * SR2 * Enzo and Mark set up the the SR2 OL. We may need to steal the LED back temporarily to do pitch setting on SRM, but we can take some interesting TFs on SR2 over the weekend. * SR3 * Enzo configured a new stepper driver for SR3_IP and returned the one that had been borrowed from SRM. (The original SR3_IP had been used to replace a water-damaged unit on the BS.) * Enzo worked on diagonalizing the IP and modeling of the whole suspension. He created Foton filters representing the response of the system in slots FM6-8 of the various filter banks. * Etc * Mark got three more MPCDs (M = "medium" or "modified") from AEL and moved coil drivers around until all Type B suspensions had a driver in every position, with MPCDs for IM-H and HPCDs everywhere else. He returned the unused LPCDs. * Mark did an inventory of all the Type B electronics and got the various JGW Doc electronic items lists up to date - see [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7276|E1707276]]. This included opening all the LVDT drivers to check that they had the original cards - BS, SR3 and SRM did, but SR2 had both input cards new. We let AEL know. * Hirata-san helped Furuta-san with floor repair. * Fabian changed the PR3 thermometer battery. * Mirapro installed a bellows on the -Y side of SR3. |
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| * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]] | * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779 Type B Schedule (SR)]] |
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| ==== Vacation Info ==== | ==== Plan for week of 12/17 ==== * Final alignment of SRM payload, plus BF and SF GAS. * (Time permitting) unlocking/centering/tuning of IP. * Installation of Enomoto-kun's beam target on SRM (if available). * Installation/testing of F0 steppers on SR2, SR3, SRM, and (hopefully) final vertical height adjustment. * Installation of viewports on SRM. ==== Plan for week of 12/24 ==== * Most of team on holidays - no Kamioka work. ==== Vacation/Etc Info ==== * Mark: 12/24 - 1/4. * Hirata-san: 12/24 - 1/4. * Fabian: TBD but similar. * Enzo: TBD but similar. * Mark and Enzo: KAGRA International Workshop in Perugia, 2/14-16. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 11/19
- SRM
- We locked the suspension and craned it into the tank. This is the last Type B tank installation!
- While inspecting the O-ring between the service ring and the lower section of the tank, Hirata-san found a small nick, so he replaced it. (This will hopefully be the last time that flange is closed, so it needs to be left ready for Mirapro to tighten.)
- Hirata-san and Fabian removed the First Contact, but found that a tiny piece was left behind. With advice from Hirose-san, they managed to remove it via several rounds of dabbing with an acetone-soaked lens tissue.
- They removed the IM-RM safety bar, unlocked the lower half of the suspension, and got it reasonably well aligned by eye.
- They moved the vacuum feedthroughs and in-air cabling over, and reconnected nearly all the electronics. (The in-air cabling will need some tidying later, but
- SR2
- Enzo and Mark set up the the SR2 OL. We may need to steal the LED back temporarily to do pitch setting on SRM, but we can take some interesting TFs on SR2 over the weekend.
- SR3
- Enzo configured a new stepper driver for SR3_IP and returned the one that had been borrowed from SRM. (The original SR3_IP had been used to replace a water-damaged unit on the BS.)
- Enzo worked on diagonalizing the IP and modeling of the whole suspension. He created Foton filters representing the response of the system in slots FM6-8 of the various filter banks.
- Etc
- Mark got three more MPCDs (M = "medium" or "modified") from AEL and moved coil drivers around until all Type B suspensions had a driver in every position, with MPCDs for IM-H and HPCDs everywhere else. He returned the unused LPCDs.
Mark did an inventory of all the Type B electronics and got the various JGW Doc electronic items lists up to date - see E1707276. This included opening all the LVDT drivers to check that they had the original cards - BS, SR3 and SRM did, but SR2 had both input cards new. We let AEL know.
- Hirata-san helped Furuta-san with floor repair.
- Fabian changed the PR3 thermometer battery.
- Mirapro installed a bellows on the -Y side of SR3.
To-Do Lists, Schedule
Plan for week of 12/17
- Final alignment of SRM payload, plus BF and SF GAS.
- (Time permitting) unlocking/centering/tuning of IP.
- Installation of Enomoto-kun's beam target on SRM (if available).
- Installation/testing of F0 steppers on SR2, SR3, SRM, and (hopefully) final vertical height adjustment.
- Installation of viewports on SRM.
Plan for week of 12/24
- Most of team on holidays - no Kamioka work.
Vacation/Etc Info
- Mark: 12/24 - 1/4.
- Hirata-san: 12/24 - 1/4.
- Fabian: TBD but similar.
- Enzo: TBD but similar.
- Mark and Enzo: KAGRA International Workshop in Perugia, 2/14-16.