2134
Comment:
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2060
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Deletions are marked like this. | Additions are marked like this. |
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* 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. |
* We disconnected the SF/... section and reinstalled the F0-SF rod with the hex cable clamp attached. * We debugged an issue with the actuation (the real-time model needed rebooting). * We routed all the SF/... cables up to the bottom of the PI, and then to the feedthroughs. * We unlocked the F0 keystone and experimented to find the amount of mass needed on the SF (≈845 g). * We attached the SF trim mass, adjusting it laterally so that the SF was level in pitch and roll. * We corrected some errors on the MEDM screens (some broken links and Take/Restore Safe.snap buttons). * We cabled all the PI items through to the rack and did very basic testing. * We disconnected the security structure from the assembly frame and adjusted the PI till the SS was vertical. * We unlocked the IP and adjusted the PI jacks and FRs till the IP was centered. * We passed the halves of the LBB Cu damping ring (less the Cu) into the chamber and joined them. * We put the magnets on the LBB damper ring using the template. * We locked various combinations of keystones and measured the vertical resonance frequencies of the unlocked filters. * We spent time on getting the geophones working. The original descrambler adapters had gone missing, so Enzo created three new ones. We borrowed a cable to replace one that had broken. The geophone distributor (S1402167) failed (no power on the negative rail), and a replacement borrowed from SR3 (S1605513) kept switching off. |
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==== 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 9/4 ==== * Install SF cap; route cables. * Lift and weigh SF/BF/IRM/IM/RM/BS. * Adjust SF ballast. |
==== Plan for week of 9/13 ==== ==== Plan for week of 9/19 ==== No work Mon 9/18 (敬老の日)<<BR>> Mark, Fabian, Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Thu, Fri), Kozu-kun * Install LBB damper magnet rings in tank. * Remove tank lid. * * Install suspension. |
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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, Kozu-kun):
- We disconnected the SF/... section and reinstalled the F0-SF rod with the hex cable clamp attached.
- We debugged an issue with the actuation (the real-time model needed rebooting).
- We routed all the SF/... cables up to the bottom of the PI, and then to the feedthroughs.
- We unlocked the F0 keystone and experimented to find the amount of mass needed on the SF (≈845 g).
- We attached the SF trim mass, adjusting it laterally so that the SF was level in pitch and roll.
- We corrected some errors on the MEDM screens (some broken links and Take/Restore Safe.snap buttons).
- We cabled all the PI items through to the rack and did very basic testing.
- We disconnected the security structure from the assembly frame and adjusted the PI till the SS was vertical.
- We unlocked the IP and adjusted the PI jacks and FRs till the IP was centered.
- We passed the halves of the LBB Cu damping ring (less the Cu) into the chamber and joined them.
- We put the magnets on the LBB damper ring using the template.
- We locked various combinations of keystones and measured the vertical resonance frequencies of the unlocked filters.
- We spent time on getting the geophones working. The original descrambler adapters had gone missing, so Enzo created three new ones. We borrowed a cable to replace one that had broken. The geophone distributor (S1402167) failed (no power on the negative rail), and a replacement borrowed from SR3 (S1605513) kept switching off.
Plan for week of 9/13
Plan for week of 9/19
No work Mon 9/18 (敬老の日)
Mark, Fabian, Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Thu, Fri), Kozu-kun
- Install LBB damper magnet rings in tank.
- Remove tank lid.
- Install suspension.
Vacation Info
Mark: 10/16-24