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 * Type B Past Week Summary
  * Mark and Fabian worked at Kamioka with Fujii-san:
   * We attempted to measure the tilt sensitivity of the accelerometers by adding shims under the legs but gave up when we discovered that picking up and putting down the accelerometer perturbs the zero point even without shims. We will probably need a special tilt stage to do this properly.
   * We took some frequency and Q measurements. The results were amplitude dependent. Joris thinks that this is due to not operating the accelerometers close enough to zero DC output.
   * We set up for a test of the geophone noise. One geophone is reading half the output of the others - one side of a differential signal has probably failed.
  * Hirata-san:
   * Received extra compensation masses and washed them.
   * Received PI guides, assembled them and shipped them to Kamioka.
   * Removed adhesive from base of BS flags in preparation for regluing.
   * Did assembly drawings for cable clamps and other add-on parts for BF and SF.
 * Type B ongoing issues
  * Wires
   * Need to decide RM wire thickness and order BS and RM wires. Lead time is a few days from Nilaco.
  * OSEMs
   * Akutsu-san is working to get wide-mouth OSEMs
  * Longer cables for BF->PI and SF->PI.
   * Takahashi-san has ordered extra connectors (due any day) and will get a company to make the cables.
  * Feedthrough Adapters
   * Need large quantity of male and female D-Sub 9, IDC ribbon connectors - Takahashi-san is getting a quote.
  * Can we make SR wire breakers bigger?
   * Fukushima-san will start on machining test soon (as of 5/27).
  * Installation stuff
   * "Ceiling" work in BS clean booth (removal of second floor section) scheduled for Fri 7/1.
   * Assembly frame construction scheduled for 7/4
  * Ballast masses for payload
   * Initial batch received - ordered extra smaller ones to allow for adjustments.
  * Lower breadboard stuff
   * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss.
   * Breadboard springs (in manufacture, expected end of July)
   * Nail-head parts: quote from Mirapro received, not urgent, will be combined with assembly frame order.
  * Documents
   * BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]]		 === Type B (Mark) ===
==== Report for week of 10/29 ====
 * SRM
  * Enzo repaired some broken cables and made some long cables from shorter ones. We ultrasonically cleaned them at Toyama U, with help from Yamamoto-san. Enzo then reinforced the joins with EP30 9two cables) or heat shrink (one cable).
  * Hirata-san finished tuning the PI. It is now complete except for some PEEK cable clamp pieces which are expected next Monday.
  * Hirata-san wiped writing off the F0 and SF yoke magnets, and off the PI.
  * Hirata-san found we were running out of magnets and ordered more - we have almost enough (short by one) for the SF damper, but will need more for the LBB damper.
  * Fabian cabled and tested the BF cap picos.
  * Fabian routed all the cables up to the underside of the SF. He cabled and tested the SF LVDT and stepper.
  * We added the SF cap and weighed the SF/... section. We appear to have a good amount of load capacity margin.
  * We put receptacles and magnets on the SF damper ring.
 * SR2
  * We opened the SR2 tank, borrowed a geophone for Fujii-kun's geophone test, and left the IP locked.
  * We gathered parts for the SR2 OL. We believe we have all the pieces we need except for an LED (the one originally allocated to SR2 is currently being used for pitch setting on SRM and we may need to steal it back). Akutsu-san wants to supervise us setting up the LED and receiver supports, so that will happen next week.
 * SR3
  * Terrence visited for another week and made more measurements on the OL.
 * BS
  * We searched for the dog clamps that we had borrowed from AOS to serve as ballast for the BS LBB and returned them to the AOS pallet.
 * Electronics
  * Enzo analyzed the LPCD and worked out the resistors we need to get the drive current recommended for the IM-V OSEMs by Shoda-san. We brought back three LPCDs for modification.
==== To-Do Lists, Schedule ====
 * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]]
 * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779 Type B Schedule (SR)]]

==== Plan for week of 11/4 ====
 * Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri.
===== SRM =====
 * Main sequence
  * Add magnets to SF damper.
  * Install #353 poles
  * Move NB-03 jacks down.
  * Crane PI into AF.
  * Install F0-SF rod (#331) and flying saucer.
  * Route SF/... cables up to underside of F0.
  * Do vertical height budget.
  * Adjust SF trim mass for balance and keystone height.
  * Cable/test IP LVDTs.
  * Cable/test IP FRs.
 * LBB
  * Move KOACH filters
  * Put LBB damper rings in tank.
  * Set tank jacks to nominal height.

==== Plan for week of 11/11 ====
 * Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri.
===== SRM =====
 * Unlock IP and center roughly.
 * Calibrate IP LVDTs.
 * Check/adjust alignment of SS.
 * Add arc weights and geophones (or extra mass equivalent to geophones).
 * Cable/test geophones.
 * Improve centering/tuning of IP and SS alignment.

==== Plan for week of 11/18 ====
 * Friday 11/23 is Labor Thanksgiving Day.
 * Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Thu.
===== SRM =====
 * Unlock IP and center roughly.
 * Calibrate IP LVDTs.
 * Check/adjust alignment of SS.
 * Add arc weights and geophones (or extra mass equivalent to geophones).
 * Cable/test geophones.
 * Improve centering/tuning of IP and SS alignment.
 * Crane into tank.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 10/29

  • SRM
    • Enzo repaired some broken cables and made some long cables from shorter ones. We ultrasonically cleaned them at Toyama U, with help from Yamamoto-san. Enzo then reinforced the joins with EP30 9two cables) or heat shrink (one cable).
    • Hirata-san finished tuning the PI. It is now complete except for some PEEK cable clamp pieces which are expected next Monday.
    • Hirata-san wiped writing off the F0 and SF yoke magnets, and off the PI.
    • Hirata-san found we were running out of magnets and ordered more - we have almost enough (short by one) for the SF damper, but will need more for the LBB damper.
    • Fabian cabled and tested the BF cap picos.
    • Fabian routed all the cables up to the underside of the SF. He cabled and tested the SF LVDT and stepper.
    • We added the SF cap and weighed the SF/... section. We appear to have a good amount of load capacity margin.
    • We put receptacles and magnets on the SF damper ring.
  • SR2
    • We opened the SR2 tank, borrowed a geophone for Fujii-kun's geophone test, and left the IP locked.
    • We gathered parts for the SR2 OL. We believe we have all the pieces we need except for an LED (the one originally allocated to SR2 is currently being used for pitch setting on SRM and we may need to steal it back). Akutsu-san wants to supervise us setting up the LED and receiver supports, so that will happen next week.
  • SR3
    • Terrence visited for another week and made more measurements on the OL.
  • BS
    • We searched for the dog clamps that we had borrowed from AOS to serve as ballast for the BS LBB and returned them to the AOS pallet.
  • Electronics
    • Enzo analyzed the LPCD and worked out the resistors we need to get the drive current recommended for the IM-V OSEMs by Shoda-san. We brought back three LPCDs for modification.

To-Do Lists, Schedule

Plan for week of 11/4

  • Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri.

SRM
  • Main sequence
    • Add magnets to SF damper.
    • Install #353 poles
    • Move NB-03 jacks down.
    • Crane PI into AF.
    • Install F0-SF rod (#331) and flying saucer.
    • Route SF/... cables up to underside of F0.
    • Do vertical height budget.
    • Adjust SF trim mass for balance and keystone height.
    • Cable/test IP LVDTs.
    • Cable/test IP FRs.
  • LBB
    • Move KOACH filters
    • Put LBB damper rings in tank.
    • Set tank jacks to nominal height.

Plan for week of 11/11

  • Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri.

SRM
  • Unlock IP and center roughly.
  • Calibrate IP LVDTs.
  • Check/adjust alignment of SS.
  • Add arc weights and geophones (or extra mass equivalent to geophones).
  • Cable/test geophones.
  • Improve centering/tuning of IP and SS alignment.

Plan for week of 11/18

  • Friday 11/23 is Labor Thanksgiving Day.
  • Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Thu.

SRM
  • Unlock IP and center roughly.
  • Calibrate IP LVDTs.
  • Check/adjust alignment of SS.
  • Add arc weights and geophones (or extra mass equivalent to geophones).
  • Cable/test geophones.
  • Improve centering/tuning of IP and SS alignment.
  • Crane into tank.

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