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Size: 2021
Comment:
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Size: 2160
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| At Kamioka (Mark, Fabian, Enzo, Hirata-san): * With help from Kokeyama-san and Miyakawa-san, we debugged a problem with the real-time model freezing, which turned out to be the IO chassis shutting down because of brownout condition from an overloaded AC circuit. A combination of extra boxes added to the rack, plus surge current from the air shower could draw the full 20 A limit of the circuit. Awai-san ran a cable to a separate circuit and we moved the IO chassis onto that. * We got the stepper motor cabling and driver working, and tested the BF fishing rod stepper motor. * We got the LVDT cabling, driver and associated parts of the real-time model working. * We suspended the BF and payload to check the weight and balance after adding balance mass. The weight was spot-on and the balance was OK (about as expected and close enough to be corrected). However the height and balance of the IM was disturbed again. * Fabian worked on the redesign of the ballast masses. * Hirata-san found all the parts for the SF and the SF section of the security structure, and prepared the SF. However we then removed the Cu ring from the top cap for recleaning. * We worked with Sawada-san to get the wheels removed from the large stepladders so that could be put closer to the assembly frame for comfort and safety. * We cleaned up after a water leak from the ceiling. * We straightened the hexagonal poles in the bottom level of the security structure, in preparation for adding the new EQ stops for the RM. |
At Kamioka (Mark, Ohishi-san, Enzo, Yoshioka-kun, Kozu-kun): * We finished installing the RM OSEMs and installed the new Type5-2.2 and 5-2.4 OSEM cables. * We hung the RM and set its pitch. * We doubled-checked the BS and RM pitch, tightened the clamps and removed the winch system. * We installed the bottom section of the security structure to protect the RM/BS. * We lifted the IM/RM/BS section and weighed it. It was about 1.25 kg too heavy for the new BF, so we improvised a lighter set of ballast masses. * We installed the section of the security structure up to the BF ring, and the BF crossbars and jacks of the assembly frame. * We brought in the new BF. * We installed the BF-IRM rods and IRM top plate. * We reinstalled the IM flags and other items that had been taken off to use the winch system. * We hooked the BF-IM rod (with hex cable clamp). (We did not unlock the BF keystone.) * We cabled and tested the IM-PIT, IM-ROL and IM-YAW picos and the BF FR stepper (but not, yet, the BF LVDT). |
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| ==== Plan for coming weeks ==== Next week: * Everyone (Mark, Fabian, Enzo, Hirata-san) at Kamioka, Monday-Friday. * Readjust height and balance of BF+payload, add SF. * Get picomotor driver working. Week after next: * Everyone (Mark, Fabian, Enzo, Hirata-san) at Kamioka, Monday-Friday. * Continue adding SF and suspend BF. |
==== Plan for week of 8/14 ==== Site closure: Mon, Tue<<BR>> Vacation: Fabian (Mon-Fri)<<BR>> Kamioka: Mark (Wed-Fri), Enzo (Wed-Fri), Yoshioka-kun (Wed, Fri), Ohishi (Thu-Fri).<<BR>> * Remove LBB blade units from PI, then remove blades and send for remachining. * Remove LBB rings from chamber and send for recleaning. * Unlock BF, adjust ballast masses on IM/RM/BS to correct pitch/roll/vertical. * Test, calibrate BF LVDT. Mitaka: Hirata-san (Mon-Fri)<<BR>> * SR Stuff ==== Plan for week of 8/21 ==== Vacation: Fabian (Mon)<<BR>> Kamioka: Mark, Ohishi, Fabian (Tue-Fri), Enzo, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun. * Install side panels of IRM and OSEMs. * Route IRM OSEM cables, test/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. Mitaka: Hirata-san. * SR stuff. ==== Vacation Info ==== Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct |
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, Yoshioka-kun, Kozu-kun):
- We finished installing the RM OSEMs and installed the new Type5-2.2 and 5-2.4 OSEM cables.
- We hung the RM and set its pitch.
- We doubled-checked the BS and RM pitch, tightened the clamps and removed the winch system.
- We installed the bottom section of the security structure to protect the RM/BS.
- We lifted the IM/RM/BS section and weighed it. It was about 1.25 kg too heavy for the new BF, so we improvised a lighter set of ballast masses.
- We installed the section of the security structure up to the BF ring, and the BF crossbars and jacks of the assembly frame.
- We brought in the new BF.
- We installed the BF-IRM rods and IRM top plate.
- We reinstalled the IM flags and other items that had been taken off to use the winch system.
- We hooked the BF-IM rod (with hex cable clamp). (We did not unlock the BF keystone.)
- We cabled and tested the IM-PIT, IM-ROL and IM-YAW picos and the BF FR stepper (but not, yet, the BF LVDT).
Plan for week of 8/14
Site closure: Mon, Tue
Vacation: Fabian (Mon-Fri)
Kamioka: Mark (Wed-Fri), Enzo (Wed-Fri), Yoshioka-kun (Wed, Fri), Ohishi (Thu-Fri).
- Remove LBB blade units from PI, then remove blades and send for remachining.
- Remove LBB rings from chamber and send for recleaning.
- Unlock BF, adjust ballast masses on IM/RM/BS to correct pitch/roll/vertical.
- Test, calibrate BF LVDT.
Mitaka: Hirata-san (Mon-Fri)
- SR Stuff
Plan for week of 8/21
Vacation: Fabian (Mon)
Kamioka: Mark, Ohishi, Fabian (Tue-Fri), Enzo, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun.
- Install side panels of IRM and OSEMs.
- Route IRM OSEM cables, test/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.
Mitaka: Hirata-san.
- SR stuff.
Vacation Info
Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct