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| Deletions are marked like this. | Additions are marked like this. |
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| At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun): * We disconnected the SF/... section and reinstalled the F0-SF rod with the hex cable clamp attached. * We debugged an issue with the actuation (the real-time model needed rebooting). * We routed all the SF/... cables up to the bottom of the PI, and then to the feedthroughs. * We unlocked the F0 keystone and experimented to find the amount of mass needed on the SF (≈845 g). * We attached the SF trim mass, adjusting it laterally so that the SF was level in pitch and roll. * We corrected some errors on the MEDM screens (some broken links and Take/Restore Safe.snap buttons). * We cabled all the PI items through to the rack and did very basic testing. * We disconnected the security structure from the assembly frame and adjusted the PI till the SS was vertical. * We unlocked the IP and adjusted the PI jacks and FRs till the IP was centered. * We passed the halves of the LBB Cu damping ring (less the Cu) into the chamber and joined them. * We put the magnets on the LBB damper ring using the template. * We locked various combinations of keystones and measured the vertical resonance frequencies of the unlocked filters. * We spent time on getting the geophones working. The original descrambler adapters had gone missing, so Enzo created three new ones. We borrowed a cable to replace one that had broken. The geophone distributor (S1402167) failed (no power on the negative rail), and a replacement borrowed from SR3 (S1605513) kept switching off. |
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| ==== 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, Thu, Fri), Kozu-kun * Double check BS pitch with OL. * Adjust SF damper ring to correct gap. * Install lock nuts on F0 GAS FR at TBD positions. * Lock BF and F0 keystones (but ''not'' SF keystone). * Lock RM to BS and IRM to IM. * Lock RM, IRM and BF (but not SF) to security structure. * Lock IP. * Remove F0 keystone top plate (including yaw stepper) and immobilize SF/... in yaw. * Attach lifting fixture. * Remove BF- and SF-level crossbars. * Remove geophones for craning. * Disconnect in-vacuum cables from feedthrough and coil neatly for craning. * Attach lifting plates. * Attach Cu segments to LBB damper ring (needs Cu segments and BUMAX countersunk screws, expected 9/20). * Pass halves of LBB magnet ring into tank, join, and make sandwich for craning. * Crane tank lid off. * Crane LBB damper rings to top of tank and suspend. * Crane suspension out of assembly frame. * Attach LBB upper rods to LBB blade tips and rotate suspension 45° clockwise. * Crane suspension into tank and connect upper rods to LBB Cu ring. * Unclamp LBB ring "sandwich" so LBB Cu ring is suspended on upper rods. * Install LBB lower rods and hook LBB. * Measure required ballast for LBB. * Unlock suspension and readjust. * Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings). |
* Mark worked on SR2 planning. * Mark thought through what would be required to swap an optic (e.g., SRM) in situ (JGW-T1707436). * Hirata-san tried removing disks from IM flags (so we could reuse them in flag bases and make a complete set for SR2) but only got 1 of 4 out. * Hirata-san ordered more disks for IM flags. * Hirata-san asked for quotes on SF LBB blades. * Hirata-san got a reduced quote for the LBB damper rings. * Hirata-san received and cleaned suspension wires for the SR. * Fabian worked on the SR mass budget. * Fabian worked out the COM of the SR2 optic, and Mark used it to derive the proper prism positions. * Enzo and Kozu-kun worked on control filter design and installation. |
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| ==== Plan for week of 9/25 ==== TBD |
==== Plan for week of 11/27 ==== * Fabian at commissioning workshop * Hirata-san at Kamioka Tue-Fri to work with Mirapro on SRM LBB installation. * All others (Mark, Enzo, Shoda-san, Kozu-kun) at Kamioka to start SR2 assembly. * Mark from Mon lunchtime. * Kozu-kun from Mon lunchtime through Wed. * Mirror gluing. * SR2 rack setup. |
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| * Debug cabling. * Run TFs. * Install LSOL? |
==== Plan for week of 12/4 ==== * All at Kamioka * IM assembly and pico test. * Assembly frame alignment and optical table centering. * OL setup. |
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| Mark: 10/16-24 | * Mark 12/22-1/3 * Enzo TBD, probably 12/22-1/3 * Fabian 12/22-1/5 * Hirata-san 12/21-22 (conference) |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Past week report
- Mark worked on SR2 planning.
- Mark thought through what would be required to swap an optic (e.g., SRM) in situ (JGW-T1707436).
- Hirata-san tried removing disks from IM flags (so we could reuse them in flag bases and make a complete set for SR2) but only got 1 of 4 out.
- Hirata-san ordered more disks for IM flags.
- Hirata-san asked for quotes on SF LBB blades.
- Hirata-san got a reduced quote for the LBB damper rings.
- Hirata-san received and cleaned suspension wires for the SR.
- Fabian worked on the SR mass budget.
- Fabian worked out the COM of the SR2 optic, and Mark used it to derive the proper prism positions.
- Enzo and Kozu-kun worked on control filter design and installation.
Plan for week of 11/27
- Fabian at commissioning workshop
- Hirata-san at Kamioka Tue-Fri to work with Mirapro on SRM LBB installation.
- All others (Mark, Enzo, Shoda-san, Kozu-kun) at Kamioka to start SR2 assembly.
- Mark from Mon lunchtime.
- Kozu-kun from Mon lunchtime through Wed.
- Mirror gluing.
- SR2 rack setup.
Plan for week of 12/4
- All at Kamioka
- IM assembly and pico test.
- Assembly frame alignment and optical table centering.
- OL setup.
Vacation Info
- Mark 12/22-1/3
- Enzo TBD, probably 12/22-1/3
- Fabian 12/22-1/5
- Hirata-san 12/21-22 (conference)