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Size: 2739
Comment:
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Size: 1874
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): * Hirata-san and Sekine-san moved the tank lid and service port ring to the pallet with the crane and covered the open tank with the spare clean bag. * Hirata-san and Mark got the LBB damper rings assembled and installed. A joint part for the Cu ring needed to have holes enlarged because the hole pattern did not quite match that on the half-ring. The magnet ring is hanging in the chamber and the Cu ring is attached below it with clamps, ready to receive the rods that will hang down from the PI. * Hirata-san recounted all the unused cables. * Hirata-san installed the outrigger parts on the LBB, which will receive the rods coming down from the damper ring. * Enzo and Mark tested all the stepper motors. * Enzo and Mark debugged the PI horizontal LVDTs. One LVDT had a flaky connection and one card in the LVDT driver had three dead channels. Enzo created a fully working driver using parts from another driver that also had a faulty card. * Fabian adjusted the ballast mass on the SF to get good pitch/roll/vertical adjustment and attached it with screws. * Fabian set up the optical lever again (the PR2 team had repossessed the breadboard we had been using but Akutsu-san supplied another one). * ==== Plan for coming weeks ==== For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]]. |
At Kamioka (Mark, Ohishi-san, Enzo, Yoshioka-kun): * We installed the cut-down ballast mass under the IM and tweaked the IM height and balance. * We checked the range of the BF FR. * We adjusted the BF yoke by 2.5 mm to make it give ≈0 output for nominal height. * We found a good gain setting for the LVDT driver and calibrated the BF LVDT. * We set up the optical sensors facing the RM. * We assembled the IRM (with OSEMs) around the IM and got it mostly adjusted. * We changed the k1visbs model to restore the as-designed mapping of OSEMs to DAQ channels. * We confirmed that the BF LVDT actuation coil and the TM OSEM coils were working. * We connected up the IRM OSEMs (with the new Type 5-1.7 cables) but found there was an electrical issue: all the OSEMs are reading back the same constant value, around 1115. * We left the suspension in a state suitable for TFs from BF GAS actuation to sensing (in vertical) and from RM OSEM actuation to the optical sensors (in horizontal) over the weekend. At Mitaka (Hirata-san): * Hirata-san did 2D drawings of the SR LBB rods and sent off an RFQ. * Hirata-san did several cost-reduction negotiations with Mirapro. |
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| Week of 6/12: * Cabling: * Debug/fix PI vertical LVDTs #0 and #2. * Calibrate PI vertical LVDT. * Debug/fix geophone #1. * Set yoke on PI vertical LVDT (if necessary). * Cable and test PI yaw stepper. * Cable and test PI vertical stepper. * Cable and test PI horizontal steppers. * Cable and test PI horizontal LVDTs. * Calibrate PI horizontal LVDTs. * Prepare LBB. * Attach LBB outriggers and rod receptacles. * Prepare LBB Cu ring. * Remove from tank, fix incompletely threaded holes, reinstall in tank. * Lay down spacers to protect magnets (in next step). * Prepare LBB magnet ring. * Disassemble. * Pass pieces into tank. * Reassemble on top of Cu ring. * Install LBB damper. * Bind LBB damper rings together with slings. * Remove vacuum tank lid and ring. * Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method. * Crane suspension into tank. * Hook LBB Cu ring. * Hook LBB. * Crane vacuum tank lid+ring black on. * Remove vacuum tank lid (only). * Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring. * Reconnect in-air cables. |
==== 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. ==== Vacation Info ==== 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):
- We installed the cut-down ballast mass under the IM and tweaked the IM height and balance.
- We checked the range of the BF FR.
- We adjusted the BF yoke by 2.5 mm to make it give ≈0 output for nominal height.
- We found a good gain setting for the LVDT driver and calibrated the BF LVDT.
- We set up the optical sensors facing the RM.
- We assembled the IRM (with OSEMs) around the IM and got it mostly adjusted.
- We changed the k1visbs model to restore the as-designed mapping of OSEMs to DAQ channels.
- We confirmed that the BF LVDT actuation coil and the TM OSEM coils were working.
- We connected up the IRM OSEMs (with the new Type 5-1.7 cables) but found there was an electrical issue: all the OSEMs are reading back the same constant value, around 1115.
- We left the suspension in a state suitable for TFs from BF GAS actuation to sensing (in vertical) and from RM OSEM actuation to the optical sensors (in horizontal) over the weekend.
At Mitaka (Hirata-san):
- Hirata-san did 2D drawings of the SR LBB rods and sent off an RFQ.
- Hirata-san did several cost-reduction negotiations with Mirapro.
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.
Vacation Info
Mark: TBD Mid-Oct