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Size: 2458
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Size: 2590
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| Deletions are marked like this. | Additions are marked like this. |
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| ==== Report for week of 2/26 ==== * We routed all the cables from the BF level up via the flying saucer to the SF. * Hirata-san tried filing the SF cap to improve the fit, but without much success. * Hirata-san installed the Cu segments and cable clamps on the SF cap and the SF LVDT and FR cables. * We cabled and tested the BF cap picos and the SF LVDT and FR. (The LVDT still needs a full calibration.) * We worked on recovering the IM OSEM alignment. |
==== 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 |
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| ==== Plan for week of 3/5 ==== | ==== Plan for week of 4/30 ==== |
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| * Hirata-san vacation Mon 3/5, then Kamioka * Others at Kamioka. * - * '''Remove LBB temporary ballast masses from BS chamber.''' * Finish recovering IM OSEM alignment. * Calibrate SF LVDT. * Lift SF/... section and check total mass and balance. * Get SRM tank mushroom section installed (Hirata-san, Kimura-san) * Set up for rebuilding of two BFs. |
* 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. |
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| ==== Plan for week of 3/12 ==== | ==== Plan for week of 5/7 ==== |
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| * Mark at ASJ (Chiba) Fri, then Mitaka. * Hirata-san vacation Mon 3/5; Kamioka Tue-Thu; Mitaka Fri * Others Kamioka Mon-Thu * Install boxes in SR3 and SRM racks. * Lay SR3 in-air cabling. * Continue rebuild of BFs. |
* 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. * Etc * Test prototype SR3 safety bar, and set up second safety bar. * Negotiate with Mirapro to get SRM mushroom installed, avoiding 5/15. |
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| ==== Plan for week of 3/19 ==== * Mark at LVC meeting * All others at Mitaka * Make two sets of IM OSEMs * Make last in-air pico adapter cable * Make three in-air stepper splitter cables for SR2, SR3 and SRM. * Set up Dummy BS prism removal. ==== Plan for week of 3/26 ==== * Mark vacation. * Shoda-san at Mitaka * Others at Kamioka * -- * F0 Prototype Blade Test * Characterize blades. * Choose best set of three. * Remove cracked blades from filter in SRM area. * Set up test weights in SRM area, first floor. * Remove floor panel in SRM area, second floor. * Install chosen blades. * Measure load capacity. |
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| * Mark at LVC, then vacation, 3/18 (Sun) - 4/1 (Sun) * Hirata-san vacation, Mon 3/5. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
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
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.
- Etc
- Test prototype SR3 safety bar, and set up second safety bar.
- Negotiate with Mirapro to get SRM mushroom installed, avoiding 5/15.
To-Do Lists, Schedule
Vacation Info
- Fabian vacation, 3/26-4/27 (then gone).