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Size: 2225
Comment:
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Size: 2743
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 7: | Line 7: |
| At Kamioka (Mark, Fabian, Enzo, Hirata-san): * We disconnected the in-vacuum and in-air cabling from the feedthroughs. * We removed crossbars below BF and SF. * We set the SF damper to 4 mm clearance. * We adjusted the jacks to nominal height. * We removed the geophones and PI yaw stepper for craning. * We craned the suspension into the tank, and hooked the LBB Cu ring. * We replaced the geophones etc. * We unlocked all but the IP and adjusted the jacks until the pendulum was centered in the security structure. * We unlocked the IP and adjusted to to center with the jacks and fishing rods. * We craned the vacuum tank lid+ring back on, and then removed just the lid (only). * We unclamped the LBB damper rings and removed the spacers. * We removed the blocks and shims supporting the LBB, inserted the long screw feet and hooked the LBB to the Cu damper ring. * We added 2*31.5 kg of ballast to the LBB, which got the blades to the point where firm pressure would depress the tips. * We reconnected the in-vacuum cabling. In ≈15 places we opted to omit the Type 1 cable and use a F-F gender bender. * We reconnected all but four of the in-air cables. |
At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun): * We characterized the remachined LBB blades, chose three and installed them in the LBB blade units in the PI. * We removed all sticky labels from the PI and cleaned the affected areas (and as much as possible of the rest of the surface) with ethanol. * We rearranged the arc weights on the PI to make space for the magic wand and installed the magic wand. * We rearranged the magnets on the SF damper ring to suit three Cu segments (instead of two as in the test hang). * We put proper vacuum-compatible tubing around all the stepper motor connections on the top of the PI (replacing cling wrap). * We craned out the SF temporarily and retrieved the lost PEEK cable clamp collet from the BF. * We closed the BF, craned the SF back in, and hooked the BF/..., this time with the hex cable clamp. * We routed cables from the BF via the hex cable clamp to the SF level. * We adjusted the BF trim mass for pitch, roll and vertical, and got the IRM hanging symmetrically around the IM. * We adjusted all the IRM OSEMs laterally and in/out. * We calibrated the SF LVDT and tested the SF FR stepper. * We suspended the SF/... section and weighed it but found the old 7-mm maraging rod adapter did not hold it at the center, so we had to lift it with slings and could not accurately trim it for pitch/roll. * Therefore we brought forward the craning in of the PI with the SF damper ring hanging from it. * We suspended the SF successfully from the PI and unlocked the F0 keystone to check the mass budget. We needed about 1.5 kg extra, which is about right considering the hex cable clamp and cables. * However we had to leave out the F0-SF hex cable clamp because of a bad thread on the inside of the cap. Hirata-san will make a new cap by enlarging the 7-mm hole in an old cap to 8 mm. |
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| ==== Plan for week of 6/26 ==== Mark and Enzo at Kamioka: * Double-check where gender-benders were used. * Finish connecting in-air cabling. * Debug all cabling. * Work with Simon to set up LSOL. Fabian at Mitaka: * Design final ballast masses for IM, BF and SF assuming no BF rebuild (needs to be adaptable). * Check all items for BS flag/prism gluing are available (prisms, flags, jigs, mirror box, glue, scale, mixing tools etc). Hirata-san at Mitaka: * Do new 3D CAD: * BS Test Hang build, with top of tank, full suspension, and LBB damper all reversed. * Final BS build, as above, but with everything BF down rotated back to original. * In-tank version. * On-assembly-frame version. (Adjust jack positions if possible, or leave for Mark to do.) * SR2 on BS assembly frame. (Adjust jack positions if possible, or leave for Mark to do.) |
==== Plan for week of 9/13 ==== Mark (except Wed), Fabian (except Mon, Tue), Enzo, Ohishi-san (except Mon-Wed), Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun * Reinstall F0-SF rod, this time with hex cable clamp. * Route cables. * Adjust SF trim mass, adjust tilt and vertical. * Adjust SF damper gap. * Cable and test IP LVDTs. * Cable and test F0 LVDT. * Cable and test PI steppers. * Cable and test geophones. * ==== Plan for week of 9/19 ==== No work Mon 9/18 (敬老の日)<BR> Mark, Fabian, Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun * Install LBB damper rings. * Install suspension. ==== Vacation Info ==== Mark: 10/16-24 |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Past week report
At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):
- We characterized the remachined LBB blades, chose three and installed them in the LBB blade units in the PI.
- We removed all sticky labels from the PI and cleaned the affected areas (and as much as possible of the rest of the surface) with ethanol.
- We rearranged the arc weights on the PI to make space for the magic wand and installed the magic wand.
- We rearranged the magnets on the SF damper ring to suit three Cu segments (instead of two as in the test hang).
- We put proper vacuum-compatible tubing around all the stepper motor connections on the top of the PI (replacing cling wrap).
- We craned out the SF temporarily and retrieved the lost PEEK cable clamp collet from the BF.
- We closed the BF, craned the SF back in, and hooked the BF/..., this time with the hex cable clamp.
- We routed cables from the BF via the hex cable clamp to the SF level.
- We adjusted the BF trim mass for pitch, roll and vertical, and got the IRM hanging symmetrically around the IM.
- We adjusted all the IRM OSEMs laterally and in/out.
- We calibrated the SF LVDT and tested the SF FR stepper.
- We suspended the SF/... section and weighed it but found the old 7-mm maraging rod adapter did not hold it at the center, so we had to lift it with slings and could not accurately trim it for pitch/roll.
- Therefore we brought forward the craning in of the PI with the SF damper ring hanging from it.
- We suspended the SF successfully from the PI and unlocked the F0 keystone to check the mass budget. We needed about 1.5 kg extra, which is about right considering the hex cable clamp and cables.
- However we had to leave out the F0-SF hex cable clamp because of a bad thread on the inside of the cap. Hirata-san will make a new cap by enlarging the 7-mm hole in an old cap to 8 mm.
Plan for week of 9/13
Mark (except Wed), Fabian (except Mon, Tue), Enzo, Ohishi-san (except Mon-Wed), Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun
- Reinstall F0-SF rod, this time with hex cable clamp.
- Route cables.
- Adjust SF trim mass, adjust tilt and vertical.
- Adjust SF damper gap.
- Cable and test IP LVDTs.
- Cable and test F0 LVDT.
- Cable and test PI steppers.
- Cable and test geophones.
Plan for week of 9/19
No work Mon 9/18 (敬老の日)<BR> Mark, Fabian, Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun
- Install LBB damper rings.
- Install suspension.
Vacation Info
Mark: 10/16-24