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| ==== Report for week of 5/28 ==== * Enzo and Mark debugged the BS BIO connections and finally got it working. There were a total of four issues identified: * A wrong block used in the BS real-time model. * The real-time model deciding to treat the cards as numbered backwards from the slot order or the jumper settings. * Two unlabeled cables that may have been swapped. * The GAS coil driver and associated cables had been labeled HPCD #1 whereas it had been #0 in the diagram. * Hirata-san and Kozu-kun received the final F0 blades, characterized 6 of them and, with help from Takahashi-san, installed a matched set of 3 into PI #3. It appears to be 6 kg short of the load capacity that was targeted, but still with 4 kg of margin. It is close to having a good frequency but needs another round of tuning. * Mark and Terrence fixed an issue with the security structure - due to a screenshot of the CAD not updated from the BS procedure to the SR one, the BF ring had been placed 180° off in yaw. We suspended the BF from the load gauge adapter, reconfigured the BF jacks to support the ring instead of the BF, and rotated the ring. Mark corrected the procedure. |
==== Report for week of 10/29 ==== * SRM * Enzo realized that he could cover the next round of needed cables with more cable soldering and did another batch. Because Yamamoto-san's lab was running low on isopropanol, Hirata-san washed them with ethanol at Mozumi. * Enzo worked out the optimum output resistance for the LPCDs to substitute for HPCDs with the horizontal IM OSEMs. The value was quite close to that already chosen for modified LPCDs by the cryogenic group, so we're going to standardize. The modified LPCDs will have to be operated with the internal watchdog disabled for now because it was hard-wired to 2 mA. * Fabian finished adding the TM OSEM cables out to the rack and tested them. * We ran DC power and network to the second SRM stepper driver. We still need to get one more DC power cable to replace one we borrowed from SR3. We added the remaining steppers to the Python driver and MEDM screen. * We reconfigured the top of the assembly frame in preparation for the PI (removing crossbars and moving jacks down). * Hirata-san put the magnets on the SF damper and we hooked it to the PI, craned the PI into the assembly frame and joined it to the security structure. * We installed the F0-SF rod and flying saucer and suspended the SF/... section. We had plenty of spare load capacity, so we changed the CuBe spring to a weaker one and put 2.3 kg of ballast on the SF cap. This leaves 1.2 kg reserve for cables and an F0 yaw stepper mechanism. * We reduced the trim mass on the BF to compensate for the mass of the TM OSEM cables. * We measured all the bounce frequencies. * Hirata-san put magnets on the LBB damper magnet ring, put the pieces into the tank and assembled them into a sandwich ready for craning. * SR2 * Hirata-san unclamped the LBB damper rings and suspended the LBB. It still needs ballast mass and is currently sitting high, with the blades at their upper stops. |
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| ==== Plan for week of 6/11 ==== * Mark Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Tue-Fri (Mon is compensation day for f2f.) * -- * Route cables through SF-BF flying saucer up to bottom of SF. * Add minimal ballast mass to SF (rough balance only) and weigh SF/... section. * Adjust BF trim mass. * Readjust payload. * Take TFs. * Cable, test SF LVDT and FR. * Add calculated ballast to SF. * Finish tuning F0 #3 for SR3. * Park F0 #1 (for SR2) in top of SR3 assembly frame. * Move F0 #3 behind SR3. * Move F0 #1 to "factory" area (in front of SRM) and start rebuild. ==== Plan for week of 6/18 ==== * Mark Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri. * -- * Install PI. * Suspend SF/... section. * Lots of cabling. |
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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 11/11 ==== * Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri. ===== SRM ===== * Main sequence * Cable/test IP LVDTs. * Cable/test IP FRs. * Unlock IP and center roughly. * Calibrate IP LVDTs. * Check/adjust alignment of SS. * Add arc weights and geophones (or extra mass equivalent to geophones). * Cable/test geophones. * Improve centering/tuning of IP and SS alignment. * LBB * Crane LBB damper ring sandwich to top of lower section of tank. * Set tank jacks to nominal height. ==== 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 ===== * Unlock IP and center roughly. * Calibrate IP LVDTs. * Check/adjust alignment of SS. * Add arc weights and geophones (or extra mass equivalent to geophones). * Cable/test geophones. * Improve centering/tuning of IP and SS alignment. * Crane into tank. ==== Plan for week of 11/26 ==== ==== 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 10/29
- SRM
- Enzo realized that he could cover the next round of needed cables with more cable soldering and did another batch. Because Yamamoto-san's lab was running low on isopropanol, Hirata-san washed them with ethanol at Mozumi.
- Enzo worked out the optimum output resistance for the LPCDs to substitute for HPCDs with the horizontal IM OSEMs. The value was quite close to that already chosen for modified LPCDs by the cryogenic group, so we're going to standardize. The modified LPCDs will have to be operated with the internal watchdog disabled for now because it was hard-wired to 2 mA.
- Fabian finished adding the TM OSEM cables out to the rack and tested them.
- We ran DC power and network to the second SRM stepper driver. We still need to get one more DC power cable to replace one we borrowed from SR3. We added the remaining steppers to the Python driver and MEDM screen.
- We reconfigured the top of the assembly frame in preparation for the PI (removing crossbars and moving jacks down).
- Hirata-san put the magnets on the SF damper and we hooked it to the PI, craned the PI into the assembly frame and joined it to the security structure.
We installed the F0-SF rod and flying saucer and suspended the SF/... section. We had plenty of spare load capacity, so we changed the CuBe spring to a weaker one and put 2.3 kg of ballast on the SF cap. This leaves 1.2 kg reserve for cables and an F0 yaw stepper mechanism.
- We reduced the trim mass on the BF to compensate for the mass of the TM OSEM cables.
- We measured all the bounce frequencies.
- Hirata-san put magnets on the LBB damper magnet ring, put the pieces into the tank and assembled them into a sandwich ready for craning.
- SR2
- Hirata-san unclamped the LBB damper rings and suspended the LBB. It still needs ballast mass and is currently sitting high, with the blades at their upper stops.
To-Do Lists, Schedule
Plan for week of 11/11
- Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri.
SRM
- Main sequence
- Cable/test IP LVDTs.
- Cable/test IP FRs.
- Unlock IP and center roughly.
- Calibrate IP LVDTs.
- Check/adjust alignment of SS.
- Add arc weights and geophones (or extra mass equivalent to geophones).
- Cable/test geophones.
- Improve centering/tuning of IP and SS alignment.
- LBB
- Crane LBB damper ring sandwich to top of lower section of tank.
- Set tank jacks to nominal height.
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
- Unlock IP and center roughly.
- Calibrate IP LVDTs.
- Check/adjust alignment of SS.
- Add arc weights and geophones (or extra mass equivalent to geophones).
- Cable/test geophones.
- Improve centering/tuning of IP and SS alignment.
- Crane into tank.
Plan for week of 11/26
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).