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| At Kamioka (Mark, Fabian, Enzo, Hirata-san): * With help from Kokeyama-san and Miyakawa-san, we debugged a problem with the real-time model freezing, which turned out to be the IO chassis shutting down because of brownout condition from an overloaded AC circuit. A combination of extra boxes added to the rack, plus surge current from the air shower could draw the full 20 A limit of the circuit. Awai-san ran a cable to a separate circuit and we moved the IO chassis onto that. * We got the stepper motor cabling and driver working, and tested the BF fishing rod stepper motor. * We got the LVDT cabling, driver and associated parts of the real-time model working. * We suspended the BF and payload to check the weight and balance after adding balance mass. The weight was spot-on and the balance was OK (about as expected and close enough to be corrected). However the height and balance of the IM was disturbed again. * Fabian worked on the redesign of the ballast masses. * Hirata-san found all the parts for the SF and the SF section of the security structure, and prepared the SF. However we then removed the Cu ring from the top cap for recleaning. * We worked with Sawada-san to get the wheels removed from the large stepladders so that could be put closer to the assembly frame for comfort and safety. * We cleaned up after a water leak from the ceiling. * We straightened the hexagonal poles in the bottom level of the security structure, in preparation for adding the new EQ stops for the RM. |
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| ==== Plan for coming weeks ==== Next week: * Everyone (Mark, Fabian, Enzo, Hirata-san) at Kamioka, Monday-Friday. * Readjust height and balance of BF+payload, add SF. * Get picomotor driver working. Week after next: * Everyone (Mark, Fabian, Enzo, Hirata-san) at Kamioka, Monday-Friday. * Continue adding SF and suspend BF. |
* Mark and Fabian did a huge cleanup of the SR2 area and prepared a workspace for assembling the IM. * Fabian did a stocktake of the screws for the SR. * We have all we need for the IM, except one type that can be added after the rest of the IP is assembled. * We have most of what we need for the rest of the payload, and Hirata-san has ordered the others. * Hirata-san worked on SR procurement: * Suspension wire * SR additional parts (compensation masses, clamps etc) * Regular, SDC and BUMAX screws. * Additional machining on the BS sapphire prism jig to allow it to be used on the PR/SR mirror box. * LBB blade design. * Enzo and Kozu-kun (with help from Fujii-kun) worked on export from SUMCON to Matlab, and on filter design). ==== Plan for week of 11/20 ==== * Holiday on Thu 3/23 * All at Mitaka. * SR procurement, planning (Mark, Hirata-san) * SR mass budget (Fabian) * BS modeling filter design (Enzo, Kozu-kun) ==== Plan for week of 11/27 ==== * Fabian at commissioning workshop * |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Past week report
- Mark and Fabian did a huge cleanup of the SR2 area and prepared a workspace for assembling the IM.
- Fabian did a stocktake of the screws for the SR.
- We have all we need for the IM, except one type that can be added after the rest of the IP is assembled.
- We have most of what we need for the rest of the payload, and Hirata-san has ordered the others.
- Hirata-san worked on SR procurement:
- Suspension wire
- SR additional parts (compensation masses, clamps etc)
- Regular, SDC and BUMAX screws.
- Additional machining on the BS sapphire prism jig to allow it to be used on the PR/SR mirror box.
- LBB blade design.
- Enzo and Kozu-kun (with help from Fujii-kun) worked on export from SUMCON to Matlab, and on filter design).
Plan for week of 11/20
- Holiday on Thu 3/23
- All at Mitaka.
- SR procurement, planning (Mark, Hirata-san)
- SR mass budget (Fabian)
- BS modeling filter design (Enzo, Kozu-kun)
Plan for week of 11/27
- Fabian at commissioning workshop