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| At Kamioka (Mark, Fabian, Hirata-san, Yoshioka-kun): * We reconfigured the top of the assembly frame. * We cleaned the assembly frame, blowing dust out of the grooves and wiping all surfaces. * We recentered the optic table in the bottom of the frame and adjusted the frame until the top was centered over the optic table. We also recentered the trolleys. * We re-installed, centered and leveled the IM. * We solved two issues with the new wire clamps: * Some holes were not properly threaded - Hirata-san retapped them. * Some locating pins were loose - we glued them. * We mounted the BS mirror box on the trolley and brought it under the IM. * We installed the winch system and the 300 µm wires for the BS. * We set up the optical lever. * Hirata-san finished the new BF. We moved the old BF out of the cleanbooth and the new one in. |
At Kamioka (Mark, Ohishi-san, Enzo, Hirata-san, Yoshioka-kun): * We moved or covered stuff in the BS cleanbooth to prepare for the SR2 crane slot cutting and BS-> SR2 assembly frame move. * We put the service port covers back on at the BF level of the BS tank. * We used the PI jacks to center the bottom of the security structure around the RM. * We debugged a mechanical issue where the #2 IP LVDT had too narrow a gap between the moving and fixed parts, so that there was interference with only a very small clockwise yaw of the IP. We fixed it by moving the bottom baseplate (taking advantage of the fact that it was held by screws in oversize holes for this purpose). * We used the IP FRs to center the IP. * We set the gains on the IP LVDT driver. * We tested the picos and most of the steppers. The picos and IP steppers all work nicely. The PI FR and yaw steppers have jamming issues. We haven't tested the BF and SF FR steppers. * We debugged an issue with one of the geophones (#1) which has a DC offset. We did cable swaps and determined that the issue is internal to the geophone pod. A second geophone (#2) saturates at a suspiciously small voltage on the negative side. Again the issue is internal. At Mitaka (Fabian, Hirata-san): * Fabian designed an improvement to the PI yaw stepper driver mount to stop the stepper jamming. * Fabian worked on a plan to measure the load capacity of the SR PIs. * Hirata-san did 2D drawings of the PI for the SR, and of SF2 and SRM in their vacuum chambers. * Hirata-san did drawings if the SR LBB damper rings and asked for quotes. * Hirata-san asked for quotes for SR secondary wire breakers and SR IM/IRM lock screws * Hirata-san ordered SR IM wire clamps. * Hirata-san worked on parts lists for SR cable clamps. |
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| ==== Plan for week of 8/7 ==== Site closure: Friday<<BR>> Kamioka: Mark (Mon-Thu), Enzo (Tue-Thu), Yoshioka-kun (Tue, Wed), Ohishi (TBD).<<BR>> Mitaka: Hirata-san (Mon-Fri)<<BR>> Vacation: Enzo (Mon), Fabian (Mon-Fri)<<BR>> * Finish hanging BS * Hang RM. * Weigh/trim BS/RM/IM. * Suspend BS/RM/IM, add IRM. * Lay new in-air OSEM cables. |
==== Plan for week of 10/10 ==== Kamioka: Mark, Fabian, Enzo, Ohishi-san, Kozu-kun. Mitaka: Hirata-san Holiday Mon 10/9, Open Day prep Fri 10/13.<<BR>> * Tune IP, do LVDT/stepper calibration. * Remove First Contact, try OL. * TFs, final preparation for alignment in week of 10/16. * SR procurement. * Design ballast for LBB. * Continue design of improved PI yaw adjustment, also improved F0 FR. |
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| ==== Plan for week of 8/14 ==== Site closure: Mon, Tue<<BR>> Kamioka: Mark (Wed-Fri), Enzo (Wed-Fri), Yoshioka-kun (Wed, Fri), Ohishi (TBD).<<BR>> Mitaka: Hirata-san (Mon-Fri)<<BR>> Vacation: Fabian (Mon-Fri) |
==== Plan for week of 10/16 ==== Kamioka: all but Mark, Hirata-san Mitaka: Hirata-san * Work with alignment team. * SR procurement |
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| Vacation Info: Enzo: Sat 7/22 through Sun 8/6 Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct |
==== Vacation Info ==== Mark: 10/16-24 |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Past week report
At Kamioka (Mark, Ohishi-san, Enzo, Hirata-san, Yoshioka-kun):
We moved or covered stuff in the BS cleanbooth to prepare for the SR2 crane slot cutting and BS-> SR2 assembly frame move.
- We put the service port covers back on at the BF level of the BS tank.
- We used the PI jacks to center the bottom of the security structure around the RM.
- We debugged a mechanical issue where the #2 IP LVDT had too narrow a gap between the moving and fixed parts, so that there was interference with only a very small clockwise yaw of the IP. We fixed it by moving the bottom baseplate (taking advantage of the fact that it was held by screws in oversize holes for this purpose).
- We used the IP FRs to center the IP.
- We set the gains on the IP LVDT driver.
- We tested the picos and most of the steppers. The picos and IP steppers all work nicely. The PI FR and yaw steppers have jamming issues. We haven't tested the BF and SF FR steppers.
- We debugged an issue with one of the geophones (#1) which has a DC offset. We did cable swaps and determined that the issue is internal to the geophone pod. A second geophone (#2) saturates at a suspiciously small voltage on the negative side. Again the issue is internal.
At Mitaka (Fabian, Hirata-san):
- Fabian designed an improvement to the PI yaw stepper driver mount to stop the stepper jamming.
- Fabian worked on a plan to measure the load capacity of the SR PIs.
- Hirata-san did 2D drawings of the PI for the SR, and of SF2 and SRM in their vacuum chambers.
- Hirata-san did drawings if the SR LBB damper rings and asked for quotes.
- Hirata-san asked for quotes for SR secondary wire breakers and SR IM/IRM lock screws
- Hirata-san ordered SR IM wire clamps.
- Hirata-san worked on parts lists for SR cable clamps.
Plan for week of 10/10
Kamioka: Mark, Fabian, Enzo, Ohishi-san, Kozu-kun. Mitaka: Hirata-san Holiday Mon 10/9, Open Day prep Fri 10/13.
- Tune IP, do LVDT/stepper calibration.
- Remove First Contact, try OL.
- TFs, final preparation for alignment in week of 10/16.
- SR procurement.
- Design ballast for LBB.
- Continue design of improved PI yaw adjustment, also improved F0 FR.
Plan for week of 10/16
Kamioka: all but Mark, Hirata-san Mitaka: Hirata-san
- Work with alignment team.
- SR procurement
Vacation Info
Mark: 10/16-24