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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 (Mark, Fabian, Enzo, Hirata-san): * Hirata-san and Mark reversed the support ring for the LBB damper to match the reversed suspension. * Hirata-san did a trial assembly of the magnet ring for the LLB damper and placed magnets on it with the template. * Hirata-san and Mark put the base pieces for the Cu ring in the chamber. However it turns out that the holes for attaching the joint pieces are incompletely threaded and we will have to run a tap through them. * We tested the geophones. At first one didn't work at all. This turned out to be a broken wire in one of the in-vacuum adapter cables. For the test we replaced the adapter with an old-style one (and removed the matching descrambler). A second geophone mostly works but saturates at a suspiciously low number of counts at the ADC (2000 instead of 20000). * We tested the PI horizontal LVDTs. The #1 (H2) one works but cable swaps showed that #0 and #2 have issues both at the tank end and at the card. * We decided on a final location for the stepper and pico drivers on the second floor. We moved the cables for the stepper drivers (using the outside cable trays) and laid new LAN and AC cables for the picos. |
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| ==== Plan for coming weeks ==== For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]]. Week of 6/6: * Cabling: * Finish moving in-air cabling to match feedthrough positions. * Cable and test PI vertical LVDT. * Calibrate PI vertical LVDT. * Set yoke on PI vertical LVDT (if necessary). * Cable and test PI yaw stepper. * Cable and test PI vertical stepper. * Cable and test PI horizontal steppers. * Cable and test PI horizontal LVDTs. * Calibrate PI horizontal LVDTs. Week of 6/12: * Remove -Y flange cover, replace with cloth cover (or foil). * Prepare LBB. * Wipe LBB. * Loosen or remove LBB hold-down bolts. * Attach LBB outriggers and rod receptacles. * Lay out slings for LBB damper rings. * Prepare LBB damper support. * Install rods for LBB magnet ring. * Install safety rods for LBB Cu ring. * Prepare LBB Cu ring. * Pass into tank. * Reassemble on top of slings. * Lay down spacers to protect magnets (in next step). * Prepare LBB magnet ring. * Assemble temporarily. * Attach magnets with template. * Disassemble. * Pass into tank. * Reassemble on top of Cu ring. * Install LBB damper. * Pass sling ends through loops to bind LBB damper rings. * Remove vacuum tank lid and ring. * Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method. * Crane suspension into tank. * Hook LBB Cu ring. * Hook LBB. * Crane vacuum tank lid+ring black on. * Remove vacuum tank lid (only). * Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring. * Cabling, cabling, cabling. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Past week report
At Kamioka (Mark, Fabian, Enzo, Hirata-san):
- Hirata-san and Mark reversed the support ring for the LBB damper to match the reversed suspension.
- Hirata-san did a trial assembly of the magnet ring for the LLB damper and placed magnets on it with the template.
- Hirata-san and Mark put the base pieces for the Cu ring in the chamber. However it turns out that the holes for attaching the joint pieces are incompletely threaded and we will have to run a tap through them.
- We tested the geophones. At first one didn't work at all. This turned out to be a broken wire in one of the in-vacuum adapter cables. For the test we replaced the adapter with an old-style one (and removed the matching descrambler). A second geophone mostly works but saturates at a suspiciously low number of counts at the ADC (2000 instead of 20000).
- We tested the PI horizontal LVDTs. The #1 (H2) one works but cable swaps showed that #0 and #2 have issues both at the tank end and at the card.
- We decided on a final location for the stepper and pico drivers on the second floor. We moved the cables for the stepper drivers (using the outside cable trays) and laid new LAN and AC cables for the picos.
Plan for coming weeks
For more detail, see KAGRA/Subgroups/VIS/TypeB/ToDo.
Week of 6/6:
- Cabling:
- Finish moving in-air cabling to match feedthrough positions.
- Cable and test PI vertical LVDT.
- Calibrate PI vertical LVDT.
- Set yoke on PI vertical LVDT (if necessary).
- Cable and test PI yaw stepper.
- Cable and test PI vertical stepper.
- Cable and test PI horizontal steppers.
- Cable and test PI horizontal LVDTs.
- Calibrate PI horizontal LVDTs.
Week of 6/12:
- Remove -Y flange cover, replace with cloth cover (or foil).
- Prepare LBB.
- Wipe LBB.
- Loosen or remove LBB hold-down bolts.
- Attach LBB outriggers and rod receptacles.
- Lay out slings for LBB damper rings.
- Prepare LBB damper support.
- Install rods for LBB magnet ring.
- Install safety rods for LBB Cu ring.
- Prepare LBB Cu ring.
- Pass into tank.
- Reassemble on top of slings.
- Lay down spacers to protect magnets (in next step).
- Prepare LBB magnet ring.
- Assemble temporarily.
- Attach magnets with template.
- Disassemble.
- Pass into tank.
- Reassemble on top of Cu ring.
- Install LBB damper.
- Pass sling ends through loops to bind LBB damper rings.
- Remove vacuum tank lid and ring.
- Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method.
- Crane suspension into tank.
- Hook LBB Cu ring.
- Hook LBB.
- Crane vacuum tank lid+ring black on.
- Remove vacuum tank lid (only).
- Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring.
- Cabling, cabling, cabling.