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| * Type B Past Week Summary - weeks of 8/22 and 8/29 * Fabian, Mark, Zhao-kun and Yokogawa-kun did BS installation at Kamioka: * Weighed the BF, SF and dummy BS (in mirror box). * Moved the geophones onto the optical table, clamped them down and took another time series for analysis. * Aligned the IM, installed the extra trim masses, tested the picos and weighed the whole assembly. * Placed vacuum flanges and cleaned D-Sub cables ready for routing to the rack. * Realigned and immobilized the optical table (which had been bumped). * Made safety improvements on the second floor (new safety rail, new arrangement of floor pieces, caution tape around holes) * Suspended the dummy BS. Currently however it is not hanging correctly, but is off in the +Y direction by several mm relative to the mirror box. * We set up the BS OL, using one of the wheeled chests of drawers as a base and using the OL breadboard from the PR2 assembly frame. * Hirata-san made a 3D assembly model for SR2 and added the optical design. * Hirata-san worked with Uchiyama-san to solve the 90° rotation problem. It turns out the "box" part with the pistons can be rotated, so we can build the SR2 according to the original design. * Hirata-san investigated the puzzle of the BF-IM maraging rods, where the 2D drawings and 3D CAD do not agree. Fortunately the actual parts seem to agree with the 3D CAD. * Hirata-san washed 3 OSEMs (last of initial 10 for BS) and parts for two BFs (for Type A). He moved the BF parts into the clean room and will assemble them with ATC staff from next Wednesday 9/7. * Type B ongoing issues * Longer cables for BF->PI and SF->PI - RECEIVED * Longer term to-do list * Decide position of BS rack - DONE * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - ONGOING. * Write more of payload assembly procedure (Fabian) - ONGOING * Write more of BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] (Mark) - ONGOING * Lower breadboard installation to be incorporated into the procedure document. * Work on BS simulation (Fabian) * Do BS Simulink model (Mark, Kokeyama) * Do 2D drawings of SR2 parts (Hirata) * Redesign SRx IM wire clamps for larger prisms, remachined RMs * Order SRM/PRM parts (Hirata/Shoda) * Order SRx fasteners (Hirata) |
=== Type B (Mark) === ==== Past week report ==== At Kamioka (Enzo): * Enzo (with help from Miyo-kun) fixed the broken actuation coil on PI LVDT #0. * Enzo worked on the final cabling plan for BS and SRx. * Enzo replaced the LVDT driver again to have one with no dead channels (and free up the partly non-working cards for servicing). |
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| At Mitaka and Kashiwa (Mark, Hirata-san, Fabian, Enzo): * We glued magnets into their holders. * We did a walk-through of the gluing procedure at Mitaka and discovered that the secondary prisms were missing. * We took the mirror box and gluing tools to Kashiwa to do as much of the gluing as possible. * Hirose-san applied First Contact to the BS and he and Kieran moved it into the mirror box. * We practiced putting sapphire prisms on the BS but didn't apply glue. * We tried the magnet gluing jigs designed by Aso-san and found two major issues: the overall length was about 25 mm too long, and there was no adjustment to allow for the wedge. * We designed a simple modification to the jigs that hopefully would be trivial for the ATC to do: the jigs will be cut in half and the bottom section will be mounted with adhesive on an 11 mm rod that slides in the central hole of the top section. Thus the top half can be screwed into the existing recess, and the bottom half with the magnets and glue can be allowed to drop about 3 mm onto the face of the optic. Hirata-san worked with ATC to get this done and it should be ready today (Friday 7/7). * Hirata-san also got ATC to make some jigs to hold the old 5-mm prisms so that they can be ground down to 3 mm to replace the missing ones. Hirata-san will do the grinding himself today (Friday 7/7/). * We decided to continue the gluing work at Kamioka, so we brought the BS back to Mitaka and will ship it on to Kamioka next Tuesday. * Hirata-san did a version of the 3D CAD with the as-built BS Test Hang configuration. ==== Plan for weeks of 7/10, 7/17 ==== Mark, Enzo mostly at Kamioka. * More TFs. * Receive BS at Kamioka, do gluing if possible. * Document LVDT driver rebuild and other changes. * Learn how Miyo-kun's pico driver software works and make fixes/improvements. * Design/install matrices, blend filters and damping filters. * Finish tidying rack and labeling cables. * Add temporary ballast to LBB and find total required. * Try rearranging arc weights to make room for magic wand. * Start on creating SR3 rack. * Preparation for BF rebuild. |
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| Fabian, Hirata-san at Mitaka. * Clean BS secondary prisms and modified gluing jigs (Hirata-san). * Ship gluing tools and BS to Kamioka. * Do new 3D CAD for final BS install (Hirata-san): * On-assembly-frame version. * In-tank version. * Design SR assembly frame (Fabian). * Do 2D Drawings and procurement of final IM/BF/SF ballast masses (Hirata-san). * Other purchasing and preparation (spare BS clamps, suspension wire, 8-mm rod receptacles) * Do mass budget for LBB - design ballast masses (Fabian) Vacation Info: Hirata-san: Thu 7/20 through Mon 7/24 Enzo: Sat 7/22 through Sun 8/6 Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Past week report
At Kamioka (Enzo):
- Enzo (with help from Miyo-kun) fixed the broken actuation coil on PI LVDT #0.
- Enzo worked on the final cabling plan for BS and SRx.
- Enzo replaced the LVDT driver again to have one with no dead channels (and free up the partly non-working cards for servicing).
At Mitaka and Kashiwa (Mark, Hirata-san, Fabian, Enzo):
- We glued magnets into their holders.
- We did a walk-through of the gluing procedure at Mitaka and discovered that the secondary prisms were missing.
- We took the mirror box and gluing tools to Kashiwa to do as much of the gluing as possible.
- Hirose-san applied First Contact to the BS and he and Kieran moved it into the mirror box.
- We practiced putting sapphire prisms on the BS but didn't apply glue.
- We tried the magnet gluing jigs designed by Aso-san and found two major issues: the overall length was about 25 mm too long, and there was no adjustment to allow for the wedge.
- We designed a simple modification to the jigs that hopefully would be trivial for the ATC to do: the jigs will be cut in half and the bottom section will be mounted with adhesive on an 11 mm rod that slides in the central hole of the top section. Thus the top half can be screwed into the existing recess, and the bottom half with the magnets and glue can be allowed to drop about 3 mm onto the face of the optic. Hirata-san worked with ATC to get this done and it should be ready today (Friday 7/7).
- Hirata-san also got ATC to make some jigs to hold the old 5-mm prisms so that they can be ground down to 3 mm to replace the missing ones. Hirata-san will do the grinding himself today (Friday 7/7/).
- We decided to continue the gluing work at Kamioka, so we brought the BS back to Mitaka and will ship it on to Kamioka next Tuesday.
- Hirata-san did a version of the 3D CAD with the as-built BS Test Hang configuration.
Plan for weeks of 7/10, 7/17
Mark, Enzo mostly at Kamioka.
- More TFs.
- Receive BS at Kamioka, do gluing if possible.
- Document LVDT driver rebuild and other changes.
- Learn how Miyo-kun's pico driver software works and make fixes/improvements.
- Design/install matrices, blend filters and damping filters.
- Finish tidying rack and labeling cables.
- Add temporary ballast to LBB and find total required.
- Try rearranging arc weights to make room for magic wand.
- Start on creating SR3 rack.
- Preparation for BF rebuild.
Fabian, Hirata-san at Mitaka.
- Clean BS secondary prisms and modified gluing jigs (Hirata-san).
- Ship gluing tools and BS to Kamioka.
- Do new 3D CAD for final BS install (Hirata-san):
- On-assembly-frame version.
- In-tank version.
- Design SR assembly frame (Fabian).
- Do 2D Drawings and procurement of final IM/BF/SF ballast masses (Hirata-san).
- Other purchasing and preparation (spare BS clamps, suspension wire, 8-mm rod receptacles)
- Do mass budget for LBB - design ballast masses (Fabian)
Vacation Info: Hirata-san: Thu 7/20 through Mon 7/24 Enzo: Sat 7/22 through Sun 8/6 Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct