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 * Type B Past Week Summary
  * Akutsu-san provided a set of cleanroom gear (shoes only slightly too tight!) for use by Mark this week. And Sakamoto-san sent another set from Kamioka to Kashiwa.
  * The RM, IM and IRM were weighed, and wrapped/packed for shipment to Kamioka.
  * Mark made a checklist of all the parts of the BS mirror box and gluing jig, to help with collecting the parts from Kashiwa.
  * Hirata-san removed the remaining glue from the BS primary and secondary prisms, as well as the prisms removed from the PR hanging test mirror.
  * Fabian designed an extra 600 g of trim masses for the IM and Hirata-san made drawings and ordered them. The design allows for the masses to be added to the IM even after it has been placed in the assembly frame and the dummy optic and RM have been hung, so it should not delay work.
 * Type B ongoing issues
  * OSEMs
   * Akutsu-san is working to get wide-mouth OSEMs ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1853|2 assembled]]; another few were assembled and a batch of 7 were washed.
   * Mark worked on the schedule, making the next few weeks more realistic and incorporating the new plan for the SR RMs (the test will be used for SR2 but two more will be made from scratch next financial year).
  * Longer cables for BF->PI and SF->PI.
   * Connectors RECEIVED, cables being made.
  * SR machining test NEARLY DONE. The part looks good and will be used but the ones for SR3 and SRM will be made from scratch.
  * Lower breadboard stuff
   * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss.
   * Breadboard springs - RECEIVED.
  * 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]]
 * To-do list during Mark's vacation
  * Weigh IM/RM/IRM (Fabian, Hirata) - DONE but anomalies found.
  * Pack/ship IM/RM/IRM to Kamioka (Hirata/Fabian) - from 8/1.
  * Analyze geophone data (Fabian/Shoda) - data taken by Shoda-san; Fabian to find calibration factors.
  * Remove glue from dummy BS face (Fabian) - MOSTLY DONE.
  * Reglue flags and prisms (Tatsumi, Fabian) - from Friday 8/5.
  * Clean wire for BS and RM (Hirata) - DONE
  * Get new winch parts for new wire diameters - design received from Ikenoue-san
  * Do fit/function test of winches (Fabian/Hirata)
  * Ship winches to Kamioka (Hirata/Fabian)
  * Work on BS simulation (Fabian)
  * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - ONGOING.
  * Write more of payload assembly procedure (Fabian)
  * Write more of main assembly procedure (Mark)
 * Longer term to-do list
  * Do BS Simulink model (Mark, Kokeyama)
  * Do 2D drawings of SR2 parts (Hirata)
  * Redesign SRx IM wire clamps for larger prisms, remachined RMs.
  * Order SRM/PRM parts (Hirata/Shoda)
  * Order SRx fasteners (Hirata)
=== Type B (Mark) ===
==== Report for week of 10/15 ====
===== SRM =====
 * We received the fourth feedthrough we had been waiting for and installed it on the AF.
 * Fabian added the cables between the FE computer and the ADC/DAC boxes, and we checked that we were getting IO in the real-time model.
 * Fabian and Enzo connected up the Sat Amps.
 * Fabian double-checked the optic pitch, got the IRM nicely aligned to the IM, cabled IM OSEMs V1, V2, V3 and H1, and adjusted those OSEMs in/out to midrange.
 * Hirata-san set the compression on the F0 to 30 mm and measured the height and frequency as a function of load. He then fixed a loose screw on one of the blade tips and repeated the measurement. The frequency was fairly constant at around 0.5, which will do. He did a mass budget and chose a F1 CuBe spring. We may do a tiny bit more compression if the frequency degrades, and/or choose an even stronger spring if the load capacity is not enough.
 * Hirata-san took apart and reassembled one of the LBB blade units, which had a badly seated blade.
 * Hirata-san put cable clamps on the SF and on the PI. We are very short on the PEEK clamp pieces, so he scavenged some from SR2.
 * We added a new LAN hub for SRM, and configured two stepper drivers as SRM_IP and SRM_GAS.
 * Late in the week we received extra Type 3-4 cables (thanks to Sato-san for expediting) and were able to cable IM OSEMs H2 and H3, and the BF LVDT.
 * Enzo made a new batch of feedthrough adapters.
===== SR2 =====
 * We finalized the geophone cabling and reinstalled the geophones.
 * We received the new arc weights, and used some of them to install a basic allotment of 6 38-mm weights on SR3 per the CAD. We then added two extra 19-mm arc weights for tuning and got a good IP frequency of 0.133 Hz.
 * Apart from the F0 yaw stepper issue and the OL, the SR2 is now more-or-less complete and adjusted mechanically, and just needs software work (control loops etc). We will however have to borrow one of the geophones at some point to do a huddle test with the final batch of new geophones (including those for SRM). Terrence can set up the OL in the week of 10/29.
==== Plan for week of 10/22 ====
 * Friday is NAOJ Open Day Prep - no Kamioka work.
 * Mark, Hirata-san and Fabian at Kamioka Mon-Thu.
 * Enzo at Kamioka Tue-Thu.
===== SR2 =====
 * Do a measurement of how much torque is required on the F0 keystone to move the system in yaw. (This will help Sato-san choose a suitable stepper driver for the new design.)
 * Continue shakedown.
 * Gather parts for the OL (with help from Simon).
===== SRM =====
 * Scavenge HPCDs from SR2 and SR3 (currently we only have one for SRM) and organize to get LPCDs modified.
 * Suspend/weigh/balance the BF/... section.
 * Build up the AF and SS to the SF level.
 * Install the SF.
==== Plan for week of 10/29 ====
 * Mark, Enzo, Hirata-san, Fabian and Terrence at Kamioka Mon-Fri.
===== SR2 =====
 * Set up OL.
===== SRM =====
 * Continue assembly.
==== 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 ====
 * Terrence: 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 10/15

SRM
  • We received the fourth feedthrough we had been waiting for and installed it on the AF.
  • Fabian added the cables between the FE computer and the ADC/DAC boxes, and we checked that we were getting IO in the real-time model.
  • Fabian and Enzo connected up the Sat Amps.
  • Fabian double-checked the optic pitch, got the IRM nicely aligned to the IM, cabled IM OSEMs V1, V2, V3 and H1, and adjusted those OSEMs in/out to midrange.
  • Hirata-san set the compression on the F0 to 30 mm and measured the height and frequency as a function of load. He then fixed a loose screw on one of the blade tips and repeated the measurement. The frequency was fairly constant at around 0.5, which will do. He did a mass budget and chose a F1 CuBe spring. We may do a tiny bit more compression if the frequency degrades, and/or choose an even stronger spring if the load capacity is not enough.

  • Hirata-san took apart and reassembled one of the LBB blade units, which had a badly seated blade.
  • Hirata-san put cable clamps on the SF and on the PI. We are very short on the PEEK clamp pieces, so he scavenged some from SR2.
  • We added a new LAN hub for SRM, and configured two stepper drivers as SRM_IP and SRM_GAS.
  • Late in the week we received extra Type 3-4 cables (thanks to Sato-san for expediting) and were able to cable IM OSEMs H2 and H3, and the BF LVDT.
  • Enzo made a new batch of feedthrough adapters.

SR2
  • We finalized the geophone cabling and reinstalled the geophones.
  • We received the new arc weights, and used some of them to install a basic allotment of 6 38-mm weights on SR3 per the CAD. We then added two extra 19-mm arc weights for tuning and got a good IP frequency of 0.133 Hz.
  • Apart from the F0 yaw stepper issue and the OL, the SR2 is now more-or-less complete and adjusted mechanically, and just needs software work (control loops etc). We will however have to borrow one of the geophones at some point to do a huddle test with the final batch of new geophones (including those for SRM). Terrence can set up the OL in the week of 10/29.

Plan for week of 10/22

  • Friday is NAOJ Open Day Prep - no Kamioka work.
  • Mark, Hirata-san and Fabian at Kamioka Mon-Thu.
  • Enzo at Kamioka Tue-Thu.

SR2
  • Do a measurement of how much torque is required on the F0 keystone to move the system in yaw. (This will help Sato-san choose a suitable stepper driver for the new design.)
  • Continue shakedown.
  • Gather parts for the OL (with help from Simon).

SRM
  • Scavenge HPCDs from SR2 and SR3 (currently we only have one for SRM) and organize to get LPCDs modified.
  • Suspend/weigh/balance the BF/... section.
  • Build up the AF and SS to the SF level.
  • Install the SF.

Plan for week of 10/29

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

SR2
  • Set up OL.

SRM
  • Continue assembly.

To-Do Lists, Schedule

Vacation/Visitor Info

  • Terrence: 10/29-11/2 at Kamioka.

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