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==== Past week report ==== ==== Report for week of 1/29 ====
 * Fabian and Kozu-kun tested the FR stepper, and calibrated the keystone height as a function of FR position.
 * Fabian, Hirata-san and Kozu-kun installed and adjusted the IRM, IM OSEMs and associated cables.
 * Mark derived the diagonalization matrices for SR, posted them as [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7663| T1807663]] and entered them in the on-line system.
 * Mark fixed the GASALL screen, which had some elements hardwired to BS and did not work for SR2.
 * Mark initialized the watchdog section of the SR2 model (filters, thresholds etc).
 * Mark re-entered the IM OSEM2EUL offsets and gains, which had been entered by Enzo, but had not been saved and had been lost.
 * Mark identified and fixed a bug in the SF2 whereby the watchdog trigger was derived from the AND of the error signals from the various stages instead of the OR. Thus all stages would have to overload before the watchdog tripped. All other VIS models were similarly affected, and all affected library parts have been fixed, but the other models need to be rebuilt, which should be done at the earliest opportunity, e.g., early next week after the scheduled power outage on Sun 2/18.
 * Mark fixed the indicators for the watchdog on the OVERALL screen, which also had bad logic.
 * Mark tried using Shoda-san's measurement script to do TFs. It ran successfully, but the first data set was no good because of two issues: the excitation was apparently too large (even after a reduction by 20) and the SENSALIGN matrix was not initialized.
 * Hirata-san negotiated with Kimura-san to get the SRM tank mushroom installed (this will probably happen from Tue on the week of 3/5).
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 * Mark finished the OL calibration/diagonalization calculation and wrote it up as klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3835|3835]] and [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7205| T1707205-v4]].
 * We glued the prisms and magnets on the SR2.
 * We got Miyo-kun to set up the SR2-IM pico driver and tested it and the picos that will be used in the IM.
 * We weighed the BF for the SR2.
 * Enzo put DIO cards in the IO chassis and cabled them to the coil drivers.
 * Enzo found more of the in-vacuum cables that will be needed for SR2. Only a few remain to be found.
 * Enzo and Shoda-san installed the vacuum-feedthroughs on the assembly frame and routed many of the in-air cables.
 * Hirata-san and Mark moved the PR/SR trolley system from SR3 to SR2, reconfigured the top of the assembly frame and checked the crossbar heights. (Everything was quite close to the drawing, but a few small adjustments up/down will be required.)
 * Fabian found an issue with the IM: we have two of the upper movable masses and no lower ones. Probably one of the PRs has been built with two lower masses. Unfortunately an upper mass has an extra hole in an inconvenient place and can't be used as a lower mass. Hirata-san ordered a suitable plug part from Misumi, and Fabian washed it and glued it in with EP30.
 * Fabian assembled the RM and test-assembled the IRM. (The IRM will have to be partly disassembled during installation.)
 * Shoda-san and Enzo got all the control loops working on the BS, and worked with Izumi-san to steer the beam down the Y-arm. They found the passive damping was not working very well, even after correcting a 1.5 mm height error in F0. We may need to lower the damper ring.
 * Shoda-san created a BS Guardian.
 * We got Yamamoto-san to connect up the SR2 rack and create an SR2 real-time model.		 ==== Plan for week of 2/19 ====
 * Enzo back from Tuesday.
 * Shoda-san at Mitaka.
 * Hirata-san at Mitaka Mon+Tue (to receive and wash parts).
 * All others at Kamioka.
 * -
 * Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw.
 * Lift BF/... section and check total mass and balance.
 * Cable and test BF picos.
 * Add section of SS up to SF ring.
 * Bring in SF.
 * Hook BF/... section.
 * Route cables up to under SF.
 * Check/adjust total mass of BF/... section.
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==== Plan for week of 12/18 ====
 * Shoda-san vacation
 * Mark, Fabian, Enzo, Kozu-kun at Kamioka Mon-Wed.
 * Assembly frame alignment and optical table centering.
 * Install IM ring interface blocks and IM ring.
 * Finish IM assembly and pico test.
 * Do inventory of ballast masses.
 * OL setup.
 * Install new jack receptacles (in SR3 area, second floor) on load gauge adapter (SR2 area, second floor).		 ==== Plan for week of 2/26 ====
 * Shoda-san at Mitaka.
 * -
 * Add Cu segments to SF cap.
 * Lift SF/... section and check total mass and balance.
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==== Plan for week of 12/25 ====
 * Mark, Enzo, Fabian vacation
 * Shoda-san, Kozu-kun, Hirata-san at Kamioka Mon-Thu.
 * Hang SR and RM?		 ==== To-Do Lists, Schedule ====
 * [[../March2018]]
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 * 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
  		  * Enzo 1/30-2/19.
 * Fabian 4/2-4/27 vacation (then gone).

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 1/29

  • Fabian and Kozu-kun tested the FR stepper, and calibrated the keystone height as a function of FR position.
  • Fabian, Hirata-san and Kozu-kun installed and adjusted the IRM, IM OSEMs and associated cables.

  • Mark derived the diagonalization matrices for SR, posted them as T1807663 and entered them in the on-line system.

  • Mark fixed the GASALL screen, which had some elements hardwired to BS and did not work for SR2.
  • Mark initialized the watchdog section of the SR2 model (filters, thresholds etc).
  • Mark re-entered the IM OSEM2EUL offsets and gains, which had been entered by Enzo, but had not been saved and had been lost.
  • Mark identified and fixed a bug in the SF2 whereby the watchdog trigger was derived from the AND of the error signals from the various stages instead of the OR. Thus all stages would have to overload before the watchdog tripped. All other VIS models were similarly affected, and all affected library parts have been fixed, but the other models need to be rebuilt, which should be done at the earliest opportunity, e.g., early next week after the scheduled power outage on Sun 2/18.
  • Mark fixed the indicators for the watchdog on the OVERALL screen, which also had bad logic.
  • Mark tried using Shoda-san's measurement script to do TFs. It ran successfully, but the first data set was no good because of two issues: the excitation was apparently too large (even after a reduction by 20) and the SENSALIGN matrix was not initialized.
  • Hirata-san negotiated with Kimura-san to get the SRM tank mushroom installed (this will probably happen from Tue on the week of 3/5).

Plan for week of 2/19

  • Enzo back from Tuesday.
  • Shoda-san at Mitaka.
  • Hirata-san at Mitaka Mon+Tue (to receive and wash parts).
  • All others at Kamioka.
  • -
  • Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw.
  • Lift BF/... section and check total mass and balance.
  • Cable and test BF picos.
  • Add section of SS up to SF ring.
  • Bring in SF.
  • Hook BF/... section.
  • Route cables up to under SF.
  • Check/adjust total mass of BF/... section.

Plan for week of 2/26

  • Shoda-san at Mitaka.
  • -
  • Add Cu segments to SF cap.
  • Lift SF/... section and check total mass and balance.

To-Do Lists, Schedule

Vacation Info

  • Enzo 1/30-2/19.
  • Fabian 4/2-4/27 vacation (then gone).

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