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Size: 2590
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Size: 2293
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| ==== Report for week of 4/23 ==== * We hung the optic and set its pitch. The winch system had a lot of slop in it but the technique of relaxing the wires by lifting the optic on the EQ stops was effective in getting consistent results. * We tightened the clamps using a torque wrench, using settings of 5 N.m for the primary clamps and 20 N.m for the secondary. * We hung the RM and set its pitch. The RM winches were a lot more consistent. * However when tightening the clamps, the wire on the +Y side broke at the bottom edge of primary clamp. The wire on the -Y held, so the RM dropped a few mm onto the trolley on the +Y side. * We raised the RM trolley to support the RM and left the optic hanging inside it overnight as a safety test. * We then reversed the usual installation procedure to remove the RM and get the mirror box around the optic. We used clamp pieces as spacers to bridge the gaps created by the fact that the optic had been raised 3 mm during hanging and could not safely be lowered. We then cut the wires, leaving the op |
==== Report for weeks of 5/14, 5/21 ==== * We weighted the IM/... section of the SR3. * We set up for the F0 blade prototype test. * Takahashi-san characterized the F0 prototype blades, and ordered final blades based on the BS and SR mass budgets. * Hirata-san characterized the LBB blades and identified three sets with blades of similar strength, plus two weaker ones. However he realized that M12x50 Bumax screws for the blade sets had not been ordered, so he got a new quote and ordered them for delivery 6/11. * Mirapro installed the mushroom section of the SRM tank. * We craned in the BF and cabled and tested the yaw pico, the FR stepper and the LVDT. * We hung the IM/... section from the BF, removed ≈200 g of trim mass and rearranged the rest to get the desired height, pitch and roll. * We added the sides of the IRM and the IM OSEMs, cabled the OSEMs, and adjusted everything to get good lateral and in/out alignment of the OSEMs. * Hirata-san organized getting the LBB damper rings into the SR3 tank. He joined the halves of the Cu and magnet rings and got them ready for craning (which will happen later when we have rebuilt the SR3 IP and have somewhere to park the lid of the vacuum chamber). However he encountered a problem with the top ring: one of the screw holes in the top of the tank is not fully threaded, so one of the pillars to support half of the ring cannot be attached. He is considering various options. |
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| ==== Plan for week of 4/30 ==== * Shoda-san at Mitaka. * Mark, Enzo at Kamioka Mon-Wed or TBD. * Others having fun doing Golden Week stuff. * -- * Observe KAGRA Phase 1 operations, assist if problems arise. * Do BF TFs. * Continue SR3 hang. ==== Plan for week of 5/7 ==== * Shoda-san at Mitaka. * Hirata-san at Kamioka Mon-Wed, then Mitaka. * Kozu-kun at Kamioka Wed-Fri (but may be working with PEM on Fri). * Others (Mark, Enzo, Tanioka-kun) at Kamioka full week * -- * Continue SR3 Hang * Inspect clamps and decide whether to reuse or swap in clamps from SRM IM. * Rehang optic. * Rehang RM. * Cable RM OSEMs. * Prepare for filter testing * Remove cracked blades from F0 #1 and #3. * Remove floor panel in SR3 area. * Set up filter building trolley with crossbars, jacks and F0 test masses. |
==== Plan for week of 5/28 ==== * Mark, Enzo at Kamioka Mon-Fri. * Hirata-san at Kamioka Tue-Fri. (Mon is monthly Mitaka day.) * Kozu-kun at Kamioka Mon only. (Rest of week is job interviews.) |
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| * Etc * Test prototype SR3 safety bar, and set up second safety bar. * Negotiate with Mirapro to get SRM mushroom installed, avoiding 5/15. |
* TBD. ==== Plan for week of 6/4 ==== * Mark, Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri. (Mon is medical checkup at Mitaka.) * TBD. |
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| * Fabian vacation, 3/26-4/27 (then gone). |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for weeks of 5/14, 5/21
- We weighted the IM/... section of the SR3.
- We set up for the F0 blade prototype test.
- Takahashi-san characterized the F0 prototype blades, and ordered final blades based on the BS and SR mass budgets.
- Hirata-san characterized the LBB blades and identified three sets with blades of similar strength, plus two weaker ones. However he realized that M12x50 Bumax screws for the blade sets had not been ordered, so he got a new quote and ordered them for delivery 6/11.
- Mirapro installed the mushroom section of the SRM tank.
- We craned in the BF and cabled and tested the yaw pico, the FR stepper and the LVDT.
- We hung the IM/... section from the BF, removed ≈200 g of trim mass and rearranged the rest to get the desired height, pitch and roll.
- We added the sides of the IRM and the IM OSEMs, cabled the OSEMs, and adjusted everything to get good lateral and in/out alignment of the OSEMs.
- Hirata-san organized getting the LBB damper rings into the SR3 tank. He joined the halves of the Cu and magnet rings and got them ready for craning (which will happen later when we have rebuilt the SR3 IP and have somewhere to park the lid of the vacuum chamber). However he encountered a problem with the top ring: one of the screw holes in the top of the tank is not fully threaded, so one of the pillars to support half of the ring cannot be attached. He is considering various options.
Plan for week of 5/28
- Mark, Enzo at Kamioka Mon-Fri.
- Hirata-san at Kamioka Tue-Fri. (Mon is monthly Mitaka day.)
- Kozu-kun at Kamioka Mon only. (Rest of week is job interviews.)
- TBD.
Plan for week of 6/4
- Mark, Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri. (Mon is medical checkup at Mitaka.)
- TBD.
To-Do Lists, Schedule