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 * Type B Past Week Summary
  * Fabian worked on IM and dummy BS assembly: [[https://photos.google.com/share/AF1QipMNVSExyP3TuyhK4s_VD-ARDlNoCPCf13ZDbHUlwOw14AKgj4XUe0vYg27dQ12icQ?key=SjJ0dXJ1bjN2OGVCN3d6RnoySEtFSjVJUmVwSlZR|photos1]], [[https://photos.google.com/share/AF1QipPQdoB5vYN1VcD32TkA4QSGldODvKRwiT5h-m122ahSpWmFyyrO5MX-9ajL1LeRIg?key=VFFuUVktcEtlMURQUldhZUlRcGFhbzNDeU5IN3NB|photos2]]
   * A hole in a picomotor holder was too small. ATC staff solved this isue quickly and Hirata-san cleaned the piece.
   * Some ballast discs for the dummy optic were dirty (seen by visual inspection). Hirata-san cleaned them.
   * Some arrows were cleaned from the mirrors for the dummy optic.
  * Hirata-san worked on checking Mirapro's assembly frame design - some minor issues with rail system found.
  * Hirata-san measured another filter.
  * Hirata-san washed a large batch of parts.
  * All parts for gluing of dummy BS are in hand. We arranged with Tatsumi-san to glue magnets at Mitaka on 6/6, glue flags at Kashiwa on 6/8, and inspect bonds and bring dummy BS back to Mitaka 6/13.
  * Mark worked on solutions to allow a [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeB/dummyBS|larger mirror on dummy BS]]. After discussions with Simon and Akutsu-san we decided to go with a stainless steel plate solution. The gluing can go ahead and we can attach the plates later.
  * Mark worked on list of items for purchase in FY2016.
  * Mark worked on finding connectors for vacuum-compatible geophone adapters.
  * Mark worked more on [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235|E1504235 BS Assembly Procedure]] ([[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|Draft on OneDrive]])
 * '''Discussions '''
  * Crane will not be available on 13-14 of June.
  * Review: '''fix the date (Mark) '''
  * Measurement of iKAGRA BS position will be done in the second week of June. Then it will be taken out of the chamber after that (Ohishi)
 * IM, RM, IRM, dummy BS assembly
  * Fabian assembled the dummy BS and started on the IM.
  * Still need to find SDC-treated hook for maraging wire in IM. Still not found. Spare hook is being SDC-treated. Can be added later.
  * Will start assembly 5/30
 * Wires
  * Fabian analysis RM wire thickness versus mode frequency: [[https://onedrive.live.com/redir?resid=1447B05D5B571A84!442&authkey=!AKrjBW2W8vMKyAY&ithint=file,pdf|link]], [[https://onedrive.live.com/redir?resid=1447B05D5B571A84!421&authkey=!ALZY-tFtMCYI9Pw&ithint=file,pdf|another link]],[[https://pfalig.bn1301.livefilestore.com/y3mT7oHnuBfD9_7Ata6H90opTVY5IIIm78MQ8Rl-lChfSUtGhGiEP-mlB1rQuzliimi-pmL1JfYTKCUY_Tgan0Bfa2jq5EeSXWiCracw_5ulsm2iuf6RHJcz0ot34DaeWqdUjFnU6fILnyau69WFkBmUcTwfGYBNwSrs27eyK-jc90/RM_wire.pdf?psid=1|yet another link]] (From last week: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5106|T1605106]] /[[https://onedrive.live.com/view.aspx?resid=1447B05D5B571A84!354&ithint=file,docx&app=Word&authkey=!AO5CHNP3xlO5RjY|draft]])
 * Can we make SR wire breakers bigger?
  * Fukushima-san has not yet started the work. He will start soon (as of 5/27).
 * Flags, Metal Prisms, Sapphire prisms RECEIVED
 * Mirror box and Flag/Prism gluing
  * All parts in hand.
  * Magnet gluing and check of parts at Mitaka, Monday 6/6.
  * Gluing at Kashiwa, Wednesday 6/8.
  * Inspection of bonds and return to Mitaka, 6/13.
 * An extra structure attached to the EQ stop to prevent tipping over of the BS - no action since last week.
 * Not enough crane height problem (Hirata, Saito) - no action since last week
 * Ballast masses for payload
  * Initial batch received - ordered extra smaller ones to allow for adjustments.
 * Lower breadboard stuff
  * Assembly procedure
   * '''Need to be incorporated into the procedure document. Discuss with Takahashi (Mark)'''
  * Breadboard springs (in manufacture, expected end of July)
  * Nail-head parts: quote from Mirapro received, not urgent, will be combined with assembly frame order.
 * BS Assembly Frame Design (Mark, Hirata)
  * Hirata-san found issues with rail system part - organizing fix.
 * Clean bag
  * Ordered - expected 6/8.
 * 2D and 3D CAD
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5035|E1605035 VIS Document and Drawing Tree (BS)]]
 * Electronics
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3600|JGW-D1503600 - BS Suspension Cabling]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5111|E1605111 BS Suspension Electronic Items List]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3901|D1503901 In-Vacuum Cable Detail]]
  * Item list and timetable was given to Miyakawa-san - some corrections received and added to schematic but not yet posted.
  * Status on AEL boxes OK according to Miyakawa-san.
  * Signal generator and cable to be used for BS test. May order NIKHEF cards later if concern about AC-driven units in racks.
  * Need to get new longer versions of some previously ordered BF-PI and SF-PI cables (Takahashi).
  * Need to check previously ordered TM-BF and IM-BF OSEM cables have been flipped (Takahashi).
  * Decided to hand-make cables for geophones because previously ordered cables have no conductor on pin 5.
  * Stepper drive box (requested by Sekiguchi-san [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3385|T1503385]]) is being designed, should be ready in time.
  * Mark looking for connectors for geophone adapters.
 * Procedure documents
  * Mark worked on BS Assembly Procedure [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]]		 === Type B (Mark) ===
==== Report for week of 10/1 ====
===== SR2 =====
 * We solved a mystery with the height of the BF keystone: it turns out that running the table KOACH filters in the tank warms it up (by about 1.5°C) and causes significant sag (700 µm). D'oh!
 * We ran power to the pico drivers.
 * We got the lower section of the SR2 fairly well aligned with just a bit of adjustment with the IM pitch and roll picos.
 * We helped Lucia double-check the geometry of the IP - the current matrix calculation assumes the FRs and the LVDT sensors and actuators are colocated, which is much closer to true than for the BS, but not quite right.
 * We gave up on doing anything more with SR2 for now because we're waiting on extra extension cables for the PI and Fujii-kun will want to borrow one of the geophones next week for a huddle test with new geophones.
===== SRM =====
 * We set the pitch of the SRM and RM, tightened the clamps and removed the winch system.
 * We installed the BF crossbars of the assembly frame and the BF ring section of the security structure.
 * We lifted the IM/... section on the load gauge to find its weight.
 * We craned in the BF and removed the cap.
 * We installed the BF-IRM rods and the IRM top plate.
 * We installed the BF-IM maraging rod and flying saucer cable clamps.
 * We suspended the IM/... section and adjusted the trim masses for balance and total mass. It took quite a lot of adjustment in each of pitch, roll and vertical. The vertical was due to the fact that the weight of the IM/... section is very close to that of SR2/SR3 but the SRM BF is about 0.5 kg weaker. The roll was due to the fact that the default configuration of trim mass had no correction for the horizontal wedge on the optic. However the pitch is a bit of a mystery - nearly all of the removed mass had to come off the AR side. Fortunately we were able to correct for it entirely with masses we had in hand.
 * We routed the TM OSEM cables via the flying saucer up to the underside of the BF.
 * We got 2 power supplies from Shimode-san so we can fire up the SRM rack next week. He will also supply suitable cables to connect the power supplies to the DC power strip in the rack.
 * We received the replated yoke for the SRM top filter.

==== Plan for week of 10/8 ====
 * Monday 10/8 is Sports Day.
 * Enzo returns Tuesday 10/9.
 * Mark and Terrence (plus TBD) at Kamioka Mon-Fri.
 * Enzo, Hirata-san, Fabian and Panwei at Kamioka Tue-Fri.
===== SR2/SR3 =====
 * Terrence to set up LEN half of SR3 OL and, time permitting, TILT and LEN for SR2.
===== SRM =====
 * Cable/test BF.
 * Install IRM.
 * Install/cable/test IM OSEMs.
 * Suspend/weigh/balance the BF/... section.

==== 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)]]

==== Vacation/Visitor Info ====
 * Enzo: 9/15 through 10/8 vacation in Chile.
 * Terrence: 10/8-12, 10/29-11/2 at Kamioka.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 10/1

SR2
  • We solved a mystery with the height of the BF keystone: it turns out that running the table KOACH filters in the tank warms it up (by about 1.5°C) and causes significant sag (700 µm). D'oh!
  • We ran power to the pico drivers.
  • We got the lower section of the SR2 fairly well aligned with just a bit of adjustment with the IM pitch and roll picos.
  • We helped Lucia double-check the geometry of the IP - the current matrix calculation assumes the FRs and the LVDT sensors and actuators are colocated, which is much closer to true than for the BS, but not quite right.
  • We gave up on doing anything more with SR2 for now because we're waiting on extra extension cables for the PI and Fujii-kun will want to borrow one of the geophones next week for a huddle test with new geophones.

SRM
  • We set the pitch of the SRM and RM, tightened the clamps and removed the winch system.
  • We installed the BF crossbars of the assembly frame and the BF ring section of the security structure.
  • We lifted the IM/... section on the load gauge to find its weight.
  • We craned in the BF and removed the cap.
  • We installed the BF-IRM rods and the IRM top plate.
  • We installed the BF-IM maraging rod and flying saucer cable clamps.
  • We suspended the IM/... section and adjusted the trim masses for balance and total mass. It took quite a lot of adjustment in each of pitch, roll and vertical. The vertical was due to the fact that the weight of the IM/... section is very close to that of SR2/SR3 but the SRM BF is about 0.5 kg weaker. The roll was due to the fact that the default configuration of trim mass had no correction for the horizontal wedge on the optic. However the pitch is a bit of a mystery - nearly all of the removed mass had to come off the AR side. Fortunately we were able to correct for it entirely with masses we had in hand.
  • We routed the TM OSEM cables via the flying saucer up to the underside of the BF.
  • We got 2 power supplies from Shimode-san so we can fire up the SRM rack next week. He will also supply suitable cables to connect the power supplies to the DC power strip in the rack.
  • We received the replated yoke for the SRM top filter.

Plan for week of 10/8

  • Monday 10/8 is Sports Day.
  • Enzo returns Tuesday 10/9.
  • Mark and Terrence (plus TBD) at Kamioka Mon-Fri.
  • Enzo, Hirata-san, Fabian and Panwei at Kamioka Tue-Fri.

SR2/SR3
  • Terrence to set up LEN half of SR3 OL and, time permitting, TILT and LEN for SR2.

SRM
  • Cable/test BF.
  • Install IRM.
  • Install/cable/test IM OSEMs.
  • Suspend/weigh/balance the BF/... section.

To-Do Lists, Schedule

Vacation/Visitor Info

  • Enzo: 9/15 through 10/8 vacation in Chile.
  • Terrence: 10/8-12, 10/29-11/2 at Kamioka.

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