Differences between revisions 133 and 211 (spanning 78 versions)
⇤ ← Revision 133 as of 2017-03-21 15:08:37 →
Size: 3514
Editor: MarkBarton
Comment:
← Revision 211 as of 2017-12-15 14:47:13 → ⇥
Size: 2763
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 6: Line 6:
==== Report for week of 3/13 ====
At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san):
 * We took a full set of TFs with the BF stationary but the IRM, IM, RM and TM all hanging.
 * We marked peeling or damaged areas on the clean booth floor for Furuta-san.
 * We installed the SF, measuring its weight in the process.
 * We found the crossbars supporting the SF jacks were too high to allow the SF ring to sit on the pillars while also being partially supported by the jacks. (This was an issue with the 3D CAD - the model of the NB-01 jack had a lower minimum height than reality.) We lowered the crossbars by 5 mm and put thicker spacers (12 mm instead of 3 mm) on top of the jacks supporting the SF and everything worked well.
 * We installed newly cleaned L-brackets under the BF and SF.
 * We installed a new-style cable clamp under the SF. (This was easier with the SF on the security structure, so we had not done it earlier.)
 * We installed the SF-BF rod and hex cable clamp.
 * We suspended the BF/IRM/IM/RM/BS section and found it was light, presumably because it had been trimmed according to the Promec measurement of the SF, not Hirata-san's later value.
 * We added extra ballast mass corresponding to the difference and found the BF section floated at a good height.
 * We moved trim mass around on the BF until it hung level, and adjusted the IRM and OSEMs until the IRM-IM EQ stops were well-centered and all the OSEMs were centered laterally and mid-range.
 * We ran 11 extra 20-m in-air cables from the tank towards the rack. (We will need to add 10-m extensions.)
 * We connected most of the cables to the vacuum flanges with screws and anti-feedthrough adapters. (Some remain to be done.)
 * We debugged a 900 Hz ringing in the BF LVDT, which turned out to be because the damping was enabled without appropriate filters or gains.
 * We debugged excess noise in the TM-H3 OSEM, which turned out to be mostly due to a faulty cable. However we worry that some of it may be due to some extensions made of non-vacuum-compatible ribbon cable which we added because the TM-H2 and -H3 OSEM cables are too short.
 * We installed new security structure parts at the RM level.
 * We found all the parts for the lower breadboard suspension, including the blades, blade bases, associated cable clamps etc. We also found the jigs for installing the blades.
 * Fabian finalized the BF ballast mass design and started on the SF.
==== Report for week of 3/21 ====
At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san):
 * We took a full set of TFs with the SF stationary but the BF, IRM, IM, RM and TM all hanging.
 * We also did a TF from BF LVDT actuation and confirmed that it was working.
 * We got SUMCON running on Perry's computer and worked out how to do cut-down versions of Fabian's full Type-B model corresponding to the various partial configurations we have data for.		 ==== Past week report ====
Line 31: Line 8:
==== Plan for coming weeks ====
Next week:
 * Everyone (Mark, Fabian, Enzo, Perry Hirata-san) at Kamioka, Monday-Friday except for Hirata-san Wednesday-Friday).
 * Finish SF installation.
 * Finish BF cabling, hang BF/IRM/IM/RM/BS from SF and confirm weight matches load capacity.
 * Re-trim BF as necessary.
 * Get picomotor driver working.
Week after next:
 * Everyone (Mark, Fabian, Enzo, Hirata-san) at Kamioka, Monday-Friday.
 * Prepare for PI installation.		  * 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 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 12/25 ====
 * Mark, Enzo, Fabian vacation
 * Shoda-san, Kozu-kun, Hirata-san at Kamioka Mon-Thu.
 * Hang SR and RM?

==== 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 finished the OL calibration/diagonalization calculation and wrote it up as klog 3835 and 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 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 12/25

  • Mark, Enzo, Fabian vacation
  • Shoda-san, Kozu-kun, Hirata-san at Kamioka Mon-Thu.
  • Hang SR and RM?

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)