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==== Past week report ==== At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san): |
==== Past two weeks report ==== Kamioka (Mark, Enzo, Kozu-kun): * Supported IA team. * Replaced LPCDs for IM OSEMs with HPCDs for increased pitch/yaw range. * Re-zeroed OL after significant change of beam position during IA. * Re-laid-out OL to improve focus of lens to LEN QPD. * Offloaded the pitch/yaw actuation at the IM OSEMs using the IM pitch/yaw picos. * Enzo worked on design of control loops using the OL. * Kozu-kun worked on diagonalizing the OL. |
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* Craned in the PI. * Assembled the thrust bearing holder that receives the PI-SF rod. (It originally had a burr that prevented the bearing from seating properly, and so required filing and re-cleaning.) * Hooked the SF and lowered the jacks under the SF to suspend the SF/... section. * The top filter rose when unlocked, and required about 1.8 kg to send it back down. Therefore we may be OK - the top filter seems to have about 8 kg more capacity than as measured by G&M. The hex cable clamp (≈0.25 kg) and the cables between the PI and SF still have to be added, but we can get an extra 3 kg by removing one of the three Cu damper segments (and rearranging the other two). * Built and installed three LBB blade units. * Kept debugging the SF LVDT. We repaired several broken wires, but it's still not behaving correctly. |
Mitaka (Fabian, Hirata-san): * Fabian did mechanical design: * F0 FR * Cable clamps for the SR IP base. * New SR recoil ballast masses. * LBB ballast. * Update of BS 3D CAD with the as-built ballast. * Hirata-san * made and updated inventory list for SR. * made order list and asked some quotes. * Ordered some parts. * Talked with mirapro about SRM optical bench. * Made some drawings for SR preparation. |
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==== Plan for coming weeks ==== For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]]. |
==== Plan for week of 11/13 ==== |
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Week of 5/1: * No activity (Golden Week). |
Enzo and Kozu-kun at Mitaka * Servos * Diagonalization of OL * TFs of BF * Documentation |
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Week of 5/8: * Work from Tuesday. * Remove PI temporarily. * Add magnets to upper SF damper ring. * Reinstall PI with damper ring. * Reinstall PI-SF rod, this time with hex cable clamp. * Install PI yaw stepper. * Wire up PI yaw and vertical steppers. * Route cables from SF to PI (may involve removing part of Cu damper). |
Mark and Fabian at Kamioka. * Mark attends commissioning workshop at U Toyama. * Support BF characterization work. * Prepare for mirror gluing. * Prepare for IM assembly. Hirata-san at Mitaka * SR procurement. * Get BS prism-gluing jigs reworked for use with PR/SR mirror box. ==== Plan for week of 11/20 ==== * Holiday on Thu 3/23 * Fabian at commissioning workshop * |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Past two weeks report
Kamioka (Mark, Enzo, Kozu-kun):
- Supported IA team.
- Replaced LPCDs for IM OSEMs with HPCDs for increased pitch/yaw range.
- Re-zeroed OL after significant change of beam position during IA.
- Re-laid-out OL to improve focus of lens to LEN QPD.
- Offloaded the pitch/yaw actuation at the IM OSEMs using the IM pitch/yaw picos.
- Enzo worked on design of control loops using the OL.
- Kozu-kun worked on diagonalizing the OL.
Mitaka (Fabian, Hirata-san):
- Fabian did mechanical design:
- F0 FR
- Cable clamps for the SR IP base.
- New SR recoil ballast masses.
- LBB ballast.
- Update of BS 3D CAD with the as-built ballast.
- Hirata-san
- made and updated inventory list for SR.
- made order list and asked some quotes.
- Ordered some parts.
- Talked with mirapro about SRM optical bench.
- Made some drawings for SR preparation.
Plan for week of 11/13
Enzo and Kozu-kun at Mitaka
- Servos
- Diagonalization of OL
- TFs of BF
- Documentation
Mark and Fabian at Kamioka.
- Mark attends commissioning workshop at U Toyama.
- Support BF characterization work.
- Prepare for mirror gluing.
- Prepare for IM assembly.
Hirata-san at Mitaka
- SR procurement.
- Get BS prism-gluing jigs reworked for use with PR/SR mirror box.
Plan for week of 11/20
- Holiday on Thu 3/23
- Fabian at commissioning workshop