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 * Type B Past Week Summary
  * Mark and Fabian worked at Kamioka:
   * All the parts for the security structure were located. The clamp pieces for the IM are being taken back to Mitaka to have extra screw holes added.
   * The BS/PR2/SR2 area was cleaned and tidied to allow floor removal and assembly frame construction.
   * 21 "Type 1" cables (PI-Flange, Signal) and 15 "Type 5" cables (OSEM) were tested. They all passed. Sufficient tested "Type 2" cables (PI-Flange, Motor) were located in the PR3 area.
   * Hirata-san worked on the Inventor assembly, adding views (originally defined by Mark) of the different phases of construction.
   * Hirata-san shipped 7 SFs and some parts to Kamioka.
   * Hirata-san made assembly drawings of the damper rings and cable clamps for SR.
   * Hirata-san liaised with Mirapro about the frame assembly.
 * 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
   * Crane scale - RECEIVED
  * 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 realized that he could cover the next round of needed cables (all except geophones) with more cable soldering and did another batch. Because Yamamoto-san's lab was running low on isopropanol, Hirata-san washed them with ethanol at Mozumi.
  * Enzo worked out the optimum output resistance for the LPCDs to substitute for HPCDs with the horizontal IM OSEMs. The value was quite close to that already chosen for modified LPCDs by the cryogenic group, so we're going to standardize on 680 Ω. The modified LPCDs will have to be operated with the internal watchdog disabled for now because it was hard-wired to 2 mA.
  * Fabian finished adding the TM OSEM cables out to the rack and tested them.
  * We ran DC power and network to the second SRM stepper driver. We still need to get one more DC power cable to replace one we borrowed from SR3. We added the remaining steppers to the Python driver and MEDM screen.
  * We reconfigured the top of the assembly frame in preparation for the PI (removing crossbars and moving jacks down).
  * Hirata-san put the magnets on the SF damper and we hooked it to the PI, craned the PI into the assembly frame and joined it to the security structure.
  * We installed the F0-SF rod and flying saucer and suspended the SF/... section. We had plenty of spare load capacity, so we changed the CuBe spring to a weaker one and put 2.3 kg of ballast on the SF cap. This leaves 1.2 kg reserve for cables and an F0 yaw stepper mechanism.
  * We reduced the trim mass on the BF to compensate for the mass of the TM OSEM cables.
  * We measured all the bounce frequencies.
  * Hirata-san put magnets on the LBB damper magnet ring, put the pieces into the tank and assembled them into a sandwich ready for craning. He also did the fixed ring on the ceiling of the tank.
  * Fabian noticed that the DSub9 connectors on the PTFE cables are highly magnetic and need to be kept away from the magnets on the SF damper. This
 * SR2
  * Hirata-san unclamped the LBB damper rings and suspended the LBB. It still needs ballast mass and is currently sitting high, with the blades at their upper stops.

 
==== 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 11/11 ====
 * Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri.
===== SRM =====
 * Main sequence
  * Cable/test IP LVDTs.
  * Cable/test IP FRs.
  * 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.
 * LBB
  * Crane LBB damper ring sandwich to top of lower section of tank.
  * Set tank jacks to nominal height.

==== Plan for week of 11/19 ====
 * Friday 11/23 is Labor Thanksgiving Day.
 * Mark, Enzo and Fabian at Kamioka Mon-Thu.
 * Hirata-san at Kamioka Tue-Thu (Mitaka on Mon for Engineering Promotion Office meeting).
===== 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.

==== Plan for week of 11/26 ====
 * Move SRM in-air cables over to tank.
 * Unlock and align SRM.
==== Plan for week of 12/3 ====
 * f2f Meeting at NAOJ - no Kamioka work.


==== Vacation/Event Info ====
 * Hirata-san at Mitaka, Mon 11/19 (Engineering Promotion Office meeting).

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 realized that he could cover the next round of needed cables (all except geophones) with more cable soldering and did another batch. Because Yamamoto-san's lab was running low on isopropanol, Hirata-san washed them with ethanol at Mozumi.
    • Enzo worked out the optimum output resistance for the LPCDs to substitute for HPCDs with the horizontal IM OSEMs. The value was quite close to that already chosen for modified LPCDs by the cryogenic group, so we're going to standardize on 680 Ω. The modified LPCDs will have to be operated with the internal watchdog disabled for now because it was hard-wired to 2 mA.
    • Fabian finished adding the TM OSEM cables out to the rack and tested them.
    • We ran DC power and network to the second SRM stepper driver. We still need to get one more DC power cable to replace one we borrowed from SR3. We added the remaining steppers to the Python driver and MEDM screen.
    • We reconfigured the top of the assembly frame in preparation for the PI (removing crossbars and moving jacks down).
    • Hirata-san put the magnets on the SF damper and we hooked it to the PI, craned the PI into the assembly frame and joined it to the security structure.

    • We installed the F0-SF rod and flying saucer and suspended the SF/... section. We had plenty of spare load capacity, so we changed the CuBe spring to a weaker one and put 2.3 kg of ballast on the SF cap. This leaves 1.2 kg reserve for cables and an F0 yaw stepper mechanism.

    • We reduced the trim mass on the BF to compensate for the mass of the TM OSEM cables.
    • We measured all the bounce frequencies.
    • Hirata-san put magnets on the LBB damper magnet ring, put the pieces into the tank and assembled them into a sandwich ready for craning. He also did the fixed ring on the ceiling of the tank.
    • Fabian noticed that the DSub9 connectors on the PTFE cables are highly magnetic and need to be kept away from the magnets on the SF damper. This
  • SR2
    • Hirata-san unclamped the LBB damper rings and suspended the LBB. It still needs ballast mass and is currently sitting high, with the blades at their upper stops.

To-Do Lists, Schedule

Plan for week of 11/11

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

SRM
  • Main sequence
    • Cable/test IP LVDTs.
    • Cable/test IP FRs.
    • 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.
  • LBB
    • Crane LBB damper ring sandwich to top of lower section of tank.
    • Set tank jacks to nominal height.

Plan for week of 11/19

  • Friday 11/23 is Labor Thanksgiving Day.
  • Mark, Enzo and Fabian at Kamioka Mon-Thu.
  • Hirata-san at Kamioka Tue-Thu (Mitaka on Mon for Engineering Promotion Office meeting).

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.

Plan for week of 11/26

  • Move SRM in-air cables over to tank.
  • Unlock and align SRM.

Plan for week of 12/3

  • f2f Meeting at NAOJ - no Kamioka work.

Vacation/Event Info

  • Hirata-san at Mitaka, Mon 11/19 (Engineering Promotion Office meeting).

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