|
Size: 2134
Comment:
|
Size: 2944
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 7: | Line 7: |
| At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun): * We solved the problem with the OSEMs: cables had been plugged into the confusingly named "PD current monitor" outputs (actually LED current monitors), not the "OSEM outputs". * We solved a problem with the real-time model freezing which turned out to be the IO chassis having lost power. * We took some mass off the IM to allow for the weight of the cables, and readjusted it in pitch and roll. * We aligned the IRM to the IM and set the OSEMs to mid-range. * We added ballast to the BF. * We changed the receptacles for the SF-BF rod. The low receptacle did not fit properly into the BF keystone and Hirata-san had to file it. * We fixed a broken wire on the BF yaw pico, retested the pico and added the BF cap. * We cabled and tested the BF cap picos. * We lifted the BF and weighed and balanced it. * We installed the SF ring and brought in the SF. * We cabled the SF LVDT and did a quick test (not a full calibration). * We replaced non-vacuum compatible cables in the PI, removed various sticky labels and wiped it with ethanol. * We tried to hook the SF-BF rod but found the hole in the hex cable clamp was too small for the 8 mm rod head. We enlarged the hole but then found the PEEK pieces were too loose. We tried using foil, but then managed to lose a PEEK piece into the BF, so we will need to remove the cap of the BF to get it. |
At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun): * We moved all the in-air cables over to the tank. * We plugged all the in-air and in-vacuum cables into the feedthroughs and checked that we got signals from all the output channels (actuation not yet tested). We had to work around a snag with the new F-F gender changers that replace many Type 1 and Type 2 cables: like the vacuum feedthroughs, they flip pins 1 and 5. The in-air cables don't plug directly into the feedthroughs very well, so we made up some non-flipping adapters similar to the anti-feedthrough adapters. * Hirata-san fixed a problem with one of the rods supporting the LBB Cu ring, where the head was not seating in the receptacle at the bottom. The head was slightly bent so he just reinstalled the rod upside-down to move the bent head to a less critical spot. (This also establishes that it's possible to install the rods later if we need to, although it's more convenient to bring them in with the suspension on the crane as we've been doing it.) * We suspended the LBB. Per a request from Akutsu-san, we set it as high as we easily could. We decided on 30 mm higher than in the CAD, for a height of 367 (instead of 397) mm for the beam line above the LBB. * We moved a lot of stuff out of the +X side of the cleanbooth to behind SRM, so that Mirapro could connect the section of beam duct between the BS tank and the X arm. They put the new section in position but have not connected it up yet. * Hirata-san worked with Mirapro to get the SR assembly frame assembled in the SR3 area. (Insertion of the LBB and installation of the top of the tank is planned for 10/18-20.) * We investigated a problem with the IM OSEM readings, which were far from mid-range. Although Fabian and Ohishi-san got the payload hanging nicely on Thu 9/21, sometime between then and when we plugged the OSEMs back in on 9/28, the BF and IRM apparently tipped considerably (with the +X corner high) so that the H2 and H3 OSEM flags are fouling on the bottom and top of their respective OSEMs. * [To be continued. Do our intrepid investigators fix the problem without having to crane the suspension out of the tank again? Stay tuned for the next exciting installment!] |
| Line 22: | Line 17: |
| ==== Plan for week of 8/28 ==== Kamioka: Mark (except Tue), Ohishi-san, Fabian (except Tue), Enzo (except Tue), Hirata-san, Yoshioka-kun (Fri), Kozu-kun (Thu, Fri). * Fix/adjust IRM OSEMs. * Add BF cap; cable and test BF-1 and BF-2 picos. * Lift and weigh BF/IRM/IM/RM/BS; adjust ballast mass. * Crane in SF. * Suspend BF/IRM/IM/RM/BS. |
==== Plan for week of 10/2 ==== Kamioka: Mark, Enzo (Tue-Fri), Fabian, Ohishi-san. * Finish preparation for SR2 work. * '''Fix BF/IRM tilt issue!!!''' * Debug electronics, especially actuation. * Tune IP, do LVDT/stepper calibration. * Remove First Contact, try OL. |
| Line 30: | Line 25: |
| ==== Plan for week of 9/4 ==== * Install SF cap; route cables. * Lift and weigh SF/BF/IRM/IM/RM/BS. * Adjust SF ballast. |
==== Plan for week of 10/10 ==== Holiday Mon 10/9, Open Day prep Fri 10/13.<<BR>> * Final preparation for alignment in week of 10/16. ==== Plan for week of 10/16 ==== * Work with alignment team. |
| Line 36: | Line 33: |
| Mark: TBD Mid-Oct | 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, Fabian, Enzo, Hirata-san, Yoshioka-kun):
- We moved all the in-air cables over to the tank.
- We plugged all the in-air and in-vacuum cables into the feedthroughs and checked that we got signals from all the output channels (actuation not yet tested). We had to work around a snag with the new F-F gender changers that replace many Type 1 and Type 2 cables: like the vacuum feedthroughs, they flip pins 1 and 5. The in-air cables don't plug directly into the feedthroughs very well, so we made up some non-flipping adapters similar to the anti-feedthrough adapters.
- Hirata-san fixed a problem with one of the rods supporting the LBB Cu ring, where the head was not seating in the receptacle at the bottom. The head was slightly bent so he just reinstalled the rod upside-down to move the bent head to a less critical spot. (This also establishes that it's possible to install the rods later if we need to, although it's more convenient to bring them in with the suspension on the crane as we've been doing it.)
- We suspended the LBB. Per a request from Akutsu-san, we set it as high as we easily could. We decided on 30 mm higher than in the CAD, for a height of 367 (instead of 397) mm for the beam line above the LBB.
- We moved a lot of stuff out of the +X side of the cleanbooth to behind SRM, so that Mirapro could connect the section of beam duct between the BS tank and the X arm. They put the new section in position but have not connected it up yet.
- Hirata-san worked with Mirapro to get the SR assembly frame assembled in the SR3 area. (Insertion of the LBB and installation of the top of the tank is planned for 10/18-20.)
- We investigated a problem with the IM OSEM readings, which were far from mid-range. Although Fabian and Ohishi-san got the payload hanging nicely on Thu 9/21, sometime between then and when we plugged the OSEMs back in on 9/28, the BF and IRM apparently tipped considerably (with the +X corner high) so that the H2 and H3 OSEM flags are fouling on the bottom and top of their respective OSEMs.
- [To be continued. Do our intrepid investigators fix the problem without having to crane the suspension out of the tank again? Stay tuned for the next exciting installment!]
Plan for week of 10/2
Kamioka: Mark, Enzo (Tue-Fri), Fabian, Ohishi-san.
- Finish preparation for SR2 work.
Fix BF/IRM tilt issue!!!
- Debug electronics, especially actuation.
- Tune IP, do LVDT/stepper calibration.
- Remove First Contact, try OL.
Plan for week of 10/10
Holiday Mon 10/9, Open Day prep Fri 10/13.
- Final preparation for alignment in week of 10/16.
Plan for week of 10/16
- Work with alignment team.
Vacation Info
Mark: 10/16-24