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| * Type B Past Week Summary * Fabian took photos of the cleanroom in the ATC to help decide whether it is a good place to assemble PIs for Type A/B. * Hirata-san wiped one set each of wires for the BS and RM (addition sets pending). * Hirata-san washed remachined locking parts for the IM and screws for jacks. * Hirata-san liaised with Ikenoue-san of ATC to get winch parts designed for the new wire thicknesses. * Hirata-san worked on the Inventor 3D assembly of the SR2. * The scale for checking the masses of the IM parts was received. * Fabian and Hirata-san identified an issue with the lock screws between the IM and IRM. The screws were too tight in the holes and adjusting the size with a die caused large flakes of the black coating to come off. (These screws were ordered before the current screw policy was instituted.) Hirata-san will order better screws from Misumi and have additional machining done on them. * Fabian tracked down the calibration factors for the geophones and generated a calibrated plot. * Type B ongoing issues * OSEMs * Akutsu-san is working to get wide-mouth OSEMs * Longer cables for BF->PI and SF->PI. * Connectors RECEIVED, cables being made. * SR machining test ongoing. * Lower breadboard stuff * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss. * Breadboard springs (in manufacture, expected end of July) * Documents * 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]] * To-do list during Mark's vacation * Weigh IM/RM/IRM (Fabian, Hirata) - DONE but anomalies found. * Pack/ship IM/RM/IRM to Kamioka (Hirata/Fabian). * Analyze geophone data (Fabian/Shoda) - data taken by Shoda-san; Fabian to find calibration factors. * Remove glue from dummy BS face (Fabian) - partly done. * Reglue flags and prisms (Tatsumi, Fabian) * Clean wire for BS and RM (Hirata) - DONE * Get new winch parts for new wire diameters - design received from Ikenoue-san * Do fit/function test of winches (Fabian/Hirata) * Ship winches to Kamioka (Hirata/Fabian) * Work on BS simulation (Fabian) * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - ONGOING. * Write more of payload assembly procedure (Fabian) * Write more of main assembly procedure (Mark) * Longer term to-do list * 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) * Check SR RM machining test progress (Hirata) |
=== Type B (Mark) === ==== Report for week of 8/13 ==== * KAGRA was closed Mon/Tue 8/13-14 due to O-Bon. * Enzo and team debugged an issue with height of the SR3 keystone coupling to yaw of the payload as measured by the OL. We suspect a ferromagnetic item on the SF damper, but we're not sure. ==== Report for week of 8/20 ==== ===== SR3 ===== * Hatoya-san and Enzo gathered date for a study of yaw mode Q damping time as a study of damper ring height. ===== SR2 ===== * We continued with cabling work. * We configured the second pico driver and connected it. * We assembled the LBB damper rings in the tank, craned them to near the top and hooked them. While the tank was open we also set the jacks below the mushroom that will support the suspension to nominal height. ===== SRM ===== * We reserved and configured two pico drivers. * We checked the prism gluing and all the jigs came away successfully. * Fabian assembled the RM. * Hirata-san added ballast masses to the IM and we weighed it, as well as the RM and the optic in the mirror box. * We suspended the optic and RM. ==== Report for week of 8/27 ==== ===== SR3 ===== * We did an inventory of arc weights to see if we had enough for SRM and found that we had only enough for a basic allocation for all of type B (172 kg for BS and 103.2 kg per SR) with almost no spare for tuning. * Using SR3, we did a quick study of the IP frequency as a function of the number of arc weights, to see how much more we might need. 3 pairs of small arc weights (10 mm thick, 4.53 kg each) brought the frequency below 0.1 Hz, 4 pairs made it unstable. If SR3 is typical we would need about 27 kg extra per suspension. * After the IP study, we left three pairs of 10 mm arc weights installed on the IP for more investigation with the digital system (instead of a stopwatch). ===== SR2 ===== * We finished routing the in-vacuum cables, and connected everything through to the rack for final testing. * We brought a basic 103.2 kg set of arc weights (3 large (38 mm) and 6 medium (19 mm)) into the SR2 cleanbooth. ===== SRM ===== * Panwei calibrated 6 OSEMs to be used on the IM. * We brought in all the remaining arc weights from the pallet into the SRM cleanbooth, and Hirata-san cleaned up 1 large arc weight and 3 mediums left over from the BS that complete a basic set of 103.2 kg, plus about 5 kg spare. (However 27 kg of these are on loan to SR3.) * We assembled and installed the bottom section of the security structure under the optic and RM. * We set up a new OL for setting the pitch. We found the reflection off the AR surface was much weaker than for SR2 and SR3, but fortunately the HR surface is almost flat (ROC≈300 m) so we were able to use the HR reflection instead. * ''We set the pitch of the SRM and RM and tightened the wire clamps.'' ==== Plan for week of 9/3 ==== * Mark, Enzo, Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Mon-Fri. * (Mark possible trip to LIGO Hanford - TBD.) ===== SR2 ===== * Crane in SR2. * Move SR2 in-air cables. * Remove First Contact * Unlock and realign payload. ===== SRM ===== * ===== Etc ===== * Prepare for scheduled power outage on 9/10. ==== Plan for week of 9/10 ==== * Monday 9/10 is scheduled power outage. * Mark, Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Tue-Fri. * Enzo at Kamioka Tue-Thu, then JPS Meeting Fri, then vacation. * Recover from power outage. ==== Plan for week of 9/17 ==== * Monday 9/17 is holiday (Respect for the Aged Day). * Enzo on vacation. * Mark, Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Tue-Fri. ==== Plan for week of 9/24 ==== * Monday 9/24 is holiday (Autumn Equinox). * Mark, Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Tue-Fri. ===== SR3 ===== * Hook LBB, add ballast mass. * Tune IP. ===== SR2 ===== * Adjust ballast/trim mass, with reserve for yaw stepper. * Cable/test PI items (LVDTs, steppers, geophones). * Set damper height. * Add arc weights, adjust IP. * Stage LBB damper rings in tank. ===== SRM ===== * Check gluing result - redo if necessary. * Assemble RM. * Add IM ballast masses (we forgot this before). * Get parts from AOL and set up new pitch-setting OL. * Hang metal mass. * Hang RM. ==== To-Do Lists, Schedule ==== * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779 Type B Schedule (SR)]] ==== Vacation Info ==== * Mark: 8/13-16. * Hirata-san: 8/13-17 * Terrence: 8/24-26 f2f, then returns to Hong Kong. * Enzo: 9/14 JPS, 9/15 through 10/8 vacation in Chile. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 8/13
- KAGRA was closed Mon/Tue 8/13-14 due to O-Bon.
- Enzo and team debugged an issue with height of the SR3 keystone coupling to yaw of the payload as measured by the OL. We suspect a ferromagnetic item on the SF damper, but we're not sure.
Report for week of 8/20
SR3
- Hatoya-san and Enzo gathered date for a study of yaw mode Q damping time as a study of damper ring height.
SR2
- We continued with cabling work.
- We configured the second pico driver and connected it.
- We assembled the LBB damper rings in the tank, craned them to near the top and hooked them. While the tank was open we also set the jacks below the mushroom that will support the suspension to nominal height.
SRM
- We reserved and configured two pico drivers.
- We checked the prism gluing and all the jigs came away successfully.
- Fabian assembled the RM.
- Hirata-san added ballast masses to the IM and we weighed it, as well as the RM and the optic in the mirror box.
- We suspended the optic and RM.
Report for week of 8/27
SR3
- We did an inventory of arc weights to see if we had enough for SRM and found that we had only enough for a basic allocation for all of type B (172 kg for BS and 103.2 kg per SR) with almost no spare for tuning.
- Using SR3, we did a quick study of the IP frequency as a function of the number of arc weights, to see how much more we might need. 3 pairs of small arc weights (10 mm thick, 4.53 kg each) brought the frequency below 0.1 Hz, 4 pairs made it unstable. If SR3 is typical we would need about 27 kg extra per suspension.
- After the IP study, we left three pairs of 10 mm arc weights installed on the IP for more investigation with the digital system (instead of a stopwatch).
SR2
- We finished routing the in-vacuum cables, and connected everything through to the rack for final testing.
- We brought a basic 103.2 kg set of arc weights (3 large (38 mm) and 6 medium (19 mm)) into the SR2 cleanbooth.
SRM
- Panwei calibrated 6 OSEMs to be used on the IM.
- We brought in all the remaining arc weights from the pallet into the SRM cleanbooth, and Hirata-san cleaned up 1 large arc weight and 3 mediums left over from the BS that complete a basic set of 103.2 kg, plus about 5 kg spare. (However 27 kg of these are on loan to SR3.)
- We assembled and installed the bottom section of the security structure under the optic and RM.
- We set up a new OL for setting the pitch. We found the reflection off the AR surface was much weaker than for SR2 and SR3, but fortunately the HR surface is almost flat (ROC≈300 m) so we were able to use the HR reflection instead.
We set the pitch of the SRM and RM and tightened the wire clamps.
Plan for week of 9/3
- Mark, Enzo, Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Mon-Fri.
- (Mark possible trip to LIGO Hanford - TBD.)
SR2
- Crane in SR2.
- Move SR2 in-air cables.
- Remove First Contact
- Unlock and realign payload.
SRM
Etc
- Prepare for scheduled power outage on 9/10.
Plan for week of 9/10
- Monday 9/10 is scheduled power outage.
- Mark, Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Tue-Fri.
- Enzo at Kamioka Tue-Thu, then JPS Meeting Fri, then vacation.
- Recover from power outage.
Plan for week of 9/17
- Monday 9/17 is holiday (Respect for the Aged Day).
- Enzo on vacation.
- Mark, Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Tue-Fri.
Plan for week of 9/24
- Monday 9/24 is holiday (Autumn Equinox).
- Mark, Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Tue-Fri.
SR3
- Hook LBB, add ballast mass.
- Tune IP.
SR2
- Adjust ballast/trim mass, with reserve for yaw stepper.
- Cable/test PI items (LVDTs, steppers, geophones).
- Set damper height.
- Add arc weights, adjust IP.
- Stage LBB damper rings in tank.
SRM
- Check gluing result - redo if necessary.
- Assemble RM.
- Add IM ballast masses (we forgot this before).
- Get parts from AOL and set up new pitch-setting OL.
- Hang metal mass.
- Hang RM.
To-Do Lists, Schedule
Vacation Info
- Mark: 8/13-16.
- Hirata-san: 8/13-17
- Terrence: 8/24-26 f2f, then returns to Hong Kong.
- Enzo: 9/14 JPS, 9/15 through 10/8 vacation in Chile.