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==== Past week report ==== 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. |
==== Report for week of 1/29 ==== * Mark made two sets of in-air pico splitter cables (each with a triple for IM and a double for BF) for SR2 and SR3. * Fabian, Hirata-san and Kozu-kun worked on cabling and testing the IM pitch/roll/yaw picos, the BF FR and the BF LVDT. The LVDT connections were initially unreliable and Hirata-san had to redo the pins on the coil wires. * Fabian installed ballast masses in the BF. * Mark worked on schedule. * Mark did inventory of the stepper motor drivers (many were not accounted for on the wiki and/or JGWDoc and one is missing) and reserved two for SR3. |
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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). |
==== Plan for week of 2/13 ==== * No work Monday (建国記念の日の振替休日) * Enzo on vacation * Hirata-san at Mitaka Tue, Wed (to receive and wash parts). * Shoda-san at Mitaka * All others at Kamioka. * - * Build IRM around IM. * Cable/test/adjust IM OSEMs. * Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw. |
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==== Plan for week of 9/25 ==== TBD |
==== Plan for week of 2/19 ==== * Enzo back from Tuesday. * Shoda-san at Mitaka * All others at Kamioka. * - * Lift BF/... section and check total mass and balance. * Cable and test BF picos. * Add section of SS up to SF ring. * Bring in SF. * Hook BF/... section. * Route cables up to under SF. * Check/adjust total mass of BF/... section. |
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* Debug cabling. * Run TFs. * Install LSOL? |
==== Plan for week of 2/26 ==== * Add Cu segments to SF cap. * Lift SF/... section and check total mass and balance. |
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Mark: 10/16-24 | * Enzo 1/30-2/19. * Fabian 4/2-4/27 vacation (then gone). |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 1/29
- Mark made two sets of in-air pico splitter cables (each with a triple for IM and a double for BF) for SR2 and SR3.
- Fabian, Hirata-san and Kozu-kun worked on cabling and testing the IM pitch/roll/yaw picos, the BF FR and the BF LVDT. The LVDT connections were initially unreliable and Hirata-san had to redo the pins on the coil wires.
- Fabian installed ballast masses in the BF.
- Mark worked on schedule.
- Mark did inventory of the stepper motor drivers (many were not accounted for on the wiki and/or JGWDoc and one is missing) and reserved two for SR3.
Plan for week of 2/13
- No work Monday (建国記念の日の振替休日)
- Enzo on vacation
- Hirata-san at Mitaka Tue, Wed (to receive and wash parts).
- Shoda-san at Mitaka
- All others at Kamioka.
- -
- Build IRM around IM.
- Cable/test/adjust IM OSEMs.
- Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw.
Plan for week of 2/19
- Enzo back from Tuesday.
- Shoda-san at Mitaka
- All others at Kamioka.
- -
- Lift BF/... section and check total mass and balance.
- Cable and test BF picos.
- Add section of SS up to SF ring.
- Bring in SF.
- Hook BF/... section.
- Route cables up to under SF.
- Check/adjust total mass of BF/... section.
Plan for week of 2/26
- Add Cu segments to SF cap.
- Lift SF/... section and check total mass and balance.
Vacation Info
- Enzo 1/30-2/19.
- Fabian 4/2-4/27 vacation (then gone).