Differences between revisions 157 and 210 (spanning 53 versions)
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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]].
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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.		  * Mark analyzed the QPD data from Friday 12/1 and derived matrices to diagonalize the QPD, and calibrate output in µrad. In the process an error in the IM OSEM diagonalization was discovered: the P and Y gains were low by a factor 2.
 * Mark re-zeroed the QPD after noting the micrometer readings so we can do TFs over the weekend.
 * We prepared for the SR2 gluing:
  * We aligned the SR2 in the box with the wedge on the correct side.
  * We checked that the remachined BS prism holders fit on the PR2 mirror box.
  * We checked that with Tatsumi-san's support ring, the prisms would go on at the right height.
  * We checked the new magnet jigs.
 * We glued ferromagnetic disks in a large number of IM flag tips and flag bases, and in the SR magnet jigs.
 * We also glued SR magnets in the magnet bases.

==== Plan for week of 12/11
 * Mark, Fabian, Enzo, Kozu-kun (Mon-Thu only), Hirata-san, Shoda-san at Kamioka.
 * Mirror gluing.
 * IM assembly and pico test.
 * Assembly frame alignment and optical table centering.
 * Move trolley system from SR3.
 * OL setup.

==== Plan for week of 12/18 ====
 * Shoda-san vacation
 * Mark, Fabian, Enzo, Kozu-kun at Kamioka Mon-Wed.

==== Vacation Info ====
 * Mark 12/22-1/3
 * Enzo, 12/21-12/27 (but ''not'' 12/28)
 * Fabian 12/22-1/5
 * Hirata-san 12/21-22 (conference)
 * Shoda-san 12/18-21
  

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

  • Mark analyzed the QPD data from Friday 12/1 and derived matrices to diagonalize the QPD, and calibrate output in µrad. In the process an error in the IM OSEM diagonalization was discovered: the P and Y gains were low by a factor 2.
  • Mark re-zeroed the QPD after noting the micrometer readings so we can do TFs over the weekend.
  • We prepared for the SR2 gluing:
    • We aligned the SR2 in the box with the wedge on the correct side.
    • We checked that the remachined BS prism holders fit on the PR2 mirror box.
    • We checked that with Tatsumi-san's support ring, the prisms would go on at the right height.
    • We checked the new magnet jigs.
  • We glued ferromagnetic disks in a large number of IM flag tips and flag bases, and in the SR magnet jigs.
  • We also glued SR magnets in the magnet bases.

==== Plan for week of 12/11

  • Mark, Fabian, Enzo, Kozu-kun (Mon-Thu only), Hirata-san, Shoda-san at Kamioka.
  • Mirror gluing.
  • IM assembly and pico test.
  • Assembly frame alignment and optical table centering.
  • Move trolley system from SR3.
  • OL setup.

Plan for week of 12/18

  • Shoda-san vacation
  • Mark, Fabian, Enzo, Kozu-kun at Kamioka Mon-Wed.

Vacation Info

  • Mark 12/22-1/3

  • Enzo, 12/21-12/27 (but not 12/28)

  • Fabian 12/22-1/5
  • Hirata-san 12/21-22 (conference)
  • Shoda-san 12/18-21

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-10-28 10:02:46 by fabian.arellano)