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==== 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 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.		 ==== Report for week of 1/29 ====
 * We moved the top filter intended for SR2 (#1) into the SR3 cleanbooth.
 * Unfortunately we noticed one of the blades had many small X-shaped stress fractures on the top surface (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4058|4058]]).
 * We moved the top filter entered for SR3 (#3) into the SRM cleanbooth and inspected the blades. Two had one smallish stress fracture each and one had a huge fracture and looks close to failing (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4061|4061]]).
 * We referred the BS OL.
 * We removed the BS tank lid and inspected the BS top filter blades. They seemed fine (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4073|4073]]).
 * Hirata-san received and washed some ferromagnetic disks for IM flags and other small parts.
 * Hirata-san moved the BF with the tilted keystone (#1) out of the cleanbooth in preparation for rebuilding.
 * Hirata-san placed the second order for payload parts, and an order for remachining of nuts for cable clamps on rods.
 * Fabian measured the gain of the ADC system (homework from the Commissioning Workshop).
 
==== Plan for week of 2/5 ====
 * Enzo on vacation; all others at Kamioka.
 * -
 * Make in-air pico adapter cables.
 * Calibrate LVDT.
 * Test IM picos and BF yaw pico.
 * Test FR.
 * Install ballast mass in BF.
 * Build IRM around IM.
Line 30: Line 27:
==== 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.		 ==== Plan for week of 2/13 ====
 * No work Monday (建国記念の日の振替休日)<<BR>>
 * Enzo on vacation
 * Hirata-san at Mitaka Tue, Wed (to receive and wash parts).
 * All others at Kamioka.
 * -
 * Cable/test/adjust IM OSEMs.
 * Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw.

==== Plan for week of 2/19 ====
 * 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.
 * Add Cu segments to SF cap.
 * Hook BF/... section.
 * Route cables up to under SF.
 * Check/adjust total mass of BF/... section.

==== Vacation Info ====
 * Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30).
 * 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

  • We moved the top filter intended for SR2 (#1) into the SR3 cleanbooth.

  • Unfortunately we noticed one of the blades had many small X-shaped stress fractures on the top surface (klog 4058).

  • We moved the top filter entered for SR3 (#3) into the SRM cleanbooth and inspected the blades. Two had one smallish stress fracture each and one had a huge fracture and looks close to failing (klog 4061).

  • We referred the BS OL.

  • We removed the BS tank lid and inspected the BS top filter blades. They seemed fine (klog 4073).

  • Hirata-san received and washed some ferromagnetic disks for IM flags and other small parts.
  • Hirata-san moved the BF with the tilted keystone (#1) out of the cleanbooth in preparation for rebuilding.
  • Hirata-san placed the second order for payload parts, and an order for remachining of nuts for cable clamps on rods.
  • Fabian measured the gain of the ADC system (homework from the Commissioning Workshop).

Plan for week of 2/5

  • Enzo on vacation; all others at Kamioka.
  • -
  • Make in-air pico adapter cables.
  • Calibrate LVDT.
  • Test IM picos and BF yaw pico.
  • Test FR.
  • Install ballast mass in BF.
  • Build IRM around IM.

Plan for week of 2/13

  • No work Monday (建国記念の日の振替休日)

  • Enzo on vacation
  • Hirata-san at Mitaka Tue, Wed (to receive and wash parts).
  • All others at Kamioka.
  • -
  • Cable/test/adjust IM OSEMs.
  • Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw.

Plan for week of 2/19

  • 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.
  • Add Cu segments to SF cap.
  • Hook BF/... section.
  • Route cables up to under SF.
  • Check/adjust total mass of BF/... section.

Vacation Info

  • Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30).
  • Fabian 4/2-4/27 vacation (then gone).

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