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| ==== Report for week of 11/14 ==== * 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 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. * 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.) * 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. ==== 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)]] |
==== Report for the week of 3/4 ==== * On Monday, Mark helped Aso-san with PR3, and Monday, Tuesday and Wednesday, Fabian helped Fujii-kun with PRM. * Mark and Terrence attempted to offload some BS IM/IRM yaw adjustments that had been done by Enomoto-san last Friday. They rezeroed the OL and then opened the tank lid and did a compensating adjustment to the F0 yaw stepper, then undid the IM/IRM yaw with the pico. However this did not have the desired effect, probably because the buoyancy correction had not been cancelled when Enomoto-san was working and the BF keystone was very high, with the IM-V OSEMs way too far in and possibly touching. We did our best to back out all the adjustments but the roll TFs were still messy and there were signs that the IM was not free in yaw (the IM/IRM Y varied oppositely to IP Y, indicating that the IMR was free and the IM wasn't). We ended up deciding to have Mirapro remove the ducts on the ±X sides of the tank so we could go in and inspect. * Terrence tuned the SR3 LEN OL to be free of yaw cross-coupling. * Terrence and Enzo did a full set of filters and a Guardian for SR2 and SR3. * Terrence did health checks on SR2 and SR3. * Enzo measured mode Qs. |
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| ==== 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 3/11 ===== * Mark at Kamioka full week. * Enzo at Kamioka Mon, Tue, then JPS. * Hirata-san at Kamioka from Monday lunchtime through Friday. * Fix BS. * Final test of stepper remote enable system (someone in cleanroom checks the lights go on/off). * Install/test hardware watchdogs. * Continue monitoring SRM yaw drift. * More mode Q measurements. * Work on Type B paper. |
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| ==== Plan for week of 12/24 ==== * Most of team on holidays - no Kamioka work. |
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| ==== 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. |
==== Vacation/Travel Info ==== * Enzo at JPS then final vacation, 3/13-29 * Terrence's last day, 3/29. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for the week of 3/4
- On Monday, Mark helped Aso-san with PR3, and Monday, Tuesday and Wednesday, Fabian helped Fujii-kun with PRM.
- Mark and Terrence attempted to offload some BS IM/IRM yaw adjustments that had been done by Enomoto-san last Friday. They rezeroed the OL and then opened the tank lid and did a compensating adjustment to the F0 yaw stepper, then undid the IM/IRM yaw with the pico. However this did not have the desired effect, probably because the buoyancy correction had not been cancelled when Enomoto-san was working and the BF keystone was very high, with the IM-V OSEMs way too far in and possibly touching. We did our best to back out all the adjustments but the roll TFs were still messy and there were signs that the IM was not free in yaw (the IM/IRM Y varied oppositely to IP Y, indicating that the IMR was free and the IM wasn't). We ended up deciding to have Mirapro remove the ducts on the ±X sides of the tank so we could go in and inspect.
- Terrence tuned the SR3 LEN OL to be free of yaw cross-coupling.
- Terrence and Enzo did a full set of filters and a Guardian for SR2 and SR3.
- Terrence did health checks on SR2 and SR3.
- Enzo measured mode Qs.
==== Plan for week of 3/11 =====
- Mark at Kamioka full week.
- Enzo at Kamioka Mon, Tue, then JPS.
- Hirata-san at Kamioka from Monday lunchtime through Friday.
- Fix BS.
- Final test of stepper remote enable system (someone in cleanroom checks the lights go on/off).
- Install/test hardware watchdogs.
- Continue monitoring SRM yaw drift.
- More mode Q measurements.
- Work on Type B paper.
Vacation/Travel Info
- Enzo at JPS then final vacation, 3/13-29
- Terrence's last day, 3/29.