Differences between revisions 292 and 297 (spanning 5 versions)
Revision 292 as of 2018-06-15 13:20:31
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Editor: MarkBarton
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Revision 297 as of 2018-06-21 16:29:31
Size: 3081
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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==== Report for week of 5/28 ====
 * Enzo redid the SR3 BIO connections to match the now-working BS setup. He also fixed PR2, which had a similar problem.
 * Enzo replaced LPCDs with HPCDs in the SR3.
 * Hirata-san and Kozu-kun continued tuning the filter in PI #3. Un
==== Report for week of 6/18 ====
 * Mark checked the health of the suspensions after an earthquake on Monday morning. The BS watchdog tripped and there was a few µrad change in the pointing, but otherwise it was fine. SR3 and SR2 were also fine.
 * Mark, Enzo and Terrence finalized the trim mass on the BF to set the SF keystone height and BF pitch/roll.
 * They weighed the SF/... section. With no internal trim mass in the SF but with the flying saucer and rod, but with 2 Promec masses for rough balance, it was 255.4 kg, so allowing 1 kg for cables and fine trim mass, we would like a PI load capacity of 256.4 kg.
 * Hirata-san and Kozu-kun struggled to tune the top filter for SR3 - see klogs 5310, 5324, 5337, xxxx. At first the results were somewhat unrepeatable, with high frequency and low load capacity. This was improved by using a torque wrench (set to 50 N.m) to tighten the blade base clamp screws, retightening the blade tip screws (which had worked loose) and tightening the collar on the end of the shaft of the magic wand. Eventually ...
 * Enzo and Terrence cabled and tested the SF fishing rod, and reversed the connections on the SF LVDT actuation to bring it to standard polarity.
 * Mark and Enzo made many improvements to the Type B MEDM screens.
 * Enzo and Mark measured the BF and SF bounce frequencies (with the other keystone locked).
 * Enzo replaced a HPCD that seemed to have failed during the bounce test (but had just had a watchdog trip), and then replaced the replacement, which really did fail. It turns out we need to avoid applying more than about 25000 counts of GAS actuation.
 * Enzo offloaded the BF LVDT actuator with the BF FR to remove the need for a 10000 ct offset.
 
==== Plan for week of 6/25 ====
 * Mark, Enzo, Hirata-san, Terrence at Kamioka Mon-Fri.
 * Kozu-kun at Kamioka except Thu.
 * --
 * Shutdown Type B controls (as far as possible) in preparation for risk of accidental power outage during electrical work on 6/26.
 * Add calculated ballast to SF.
 * Park PI #1 (for SR2) in top of SR3 assembly frame.
 * Move PI #3 behind SR3.
 * Move PI #1 to in front of SRM and start rebuild.
 * Install PI #3 in .
 * Suspend SF/... section.
 * Lots of cable routing and testing.
Line 11: Line 30:
==== Plan for week of 6/11 ====
 * Mark Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Tue-Fri (Mon is compensation day for f2f.)
==== Plan for week of 7/2 ====
 * Mark, Hirata-san, Terrence at Kamioka Mon-Fri.
* Enzo at Kamioka Mon-Wed.
* Kozu-kun at Kamioka except Wed.
Line 14: Line 35:
 * Route cables through SF-BF flying saucer up to bottom of SF.
 * Add minimal ballast mass to SF (rough balance only) and weigh SF/... section.
 * Adjust BF trim mass.
 * Readjust payload.
 * Take TFs.
 * Cable, test SF LVDT and FR.
 * Add calculated ballast to SF.
 * Finish tuning F0 #3 for SR3.
 * Park F0 #1 (for SR2) in top of SR3 assembly frame.
 * Move F0 #3 behind SR3.
 * Move F0 #1 to "factory" area (in front of SRM) and start rebuild.

==== Plan for week of 6/18 ====
 * Mark Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri.
 * --
 * Install PI.
 * Suspend SF/... section.
 * Lots of cabling.
 * Lock suspension.
 * Remove tank lid and raise LBB damper rings.
 * Crane suspension into tank.
Line 36: Line 42:
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]]  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779 Type B Schedule (SR)]]
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 * Kozu-kun: 7/4 Tokyo.
 * Enzo: 7/5-6 NAOJ Party, Mitaka.
 * Terrence: 8/24-26 f2f, then returns to Hong Kong.
 * Enzo: 9/14 JPS, 9/15 through 10/18 vacation in Chile.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 6/18

  • Mark checked the health of the suspensions after an earthquake on Monday morning. The BS watchdog tripped and there was a few µrad change in the pointing, but otherwise it was fine. SR3 and SR2 were also fine.
  • Mark, Enzo and Terrence finalized the trim mass on the BF to set the SF keystone height and BF pitch/roll.
  • They weighed the SF/... section. With no internal trim mass in the SF but with the flying saucer and rod, but with 2 Promec masses for rough balance, it was 255.4 kg, so allowing 1 kg for cables and fine trim mass, we would like a PI load capacity of 256.4 kg.
  • Hirata-san and Kozu-kun struggled to tune the top filter for SR3 - see klogs 5310, 5324, 5337, xxxx. At first the results were somewhat unrepeatable, with high frequency and low load capacity. This was improved by using a torque wrench (set to 50 N.m) to tighten the blade base clamp screws, retightening the blade tip screws (which had worked loose) and tightening the collar on the end of the shaft of the magic wand. Eventually ...
  • Enzo and Terrence cabled and tested the SF fishing rod, and reversed the connections on the SF LVDT actuation to bring it to standard polarity.
  • Mark and Enzo made many improvements to the Type B MEDM screens.
  • Enzo and Mark measured the BF and SF bounce frequencies (with the other keystone locked).
  • Enzo replaced a HPCD that seemed to have failed during the bounce test (but had just had a watchdog trip), and then replaced the replacement, which really did fail. It turns out we need to avoid applying more than about 25000 counts of GAS actuation.
  • Enzo offloaded the BF LVDT actuator with the BF FR to remove the need for a 10000 ct offset.

Plan for week of 6/25

  • Mark, Enzo, Hirata-san, Terrence at Kamioka Mon-Fri.
  • Kozu-kun at Kamioka except Thu.
  • --
  • Shutdown Type B controls (as far as possible) in preparation for risk of accidental power outage during electrical work on 6/26.
  • Add calculated ballast to SF.
  • Park PI #1 (for SR2) in top of SR3 assembly frame.
  • Move PI #3 behind SR3.
  • Move PI #1 to in front of SRM and start rebuild.
  • Install PI #3 in .
  • Suspend SF/... section.
  • Lots of cable routing and testing.

Plan for week of 7/2

  • Mark, Hirata-san, Terrence at Kamioka Mon-Fri.
  • Enzo at Kamioka Mon-Wed.
  • Kozu-kun at Kamioka except Wed.
  • --
  • Lock suspension.
  • Remove tank lid and raise LBB damper rings.
  • Crane suspension into tank.

To-Do Lists, Schedule

Vacation Info

  • Kozu-kun: 7/4 Tokyo.
  • Enzo: 7/5-6 NAOJ Party, Mitaka.
  • Terrence: 8/24-26 f2f, then returns to Hong Kong.
  • Enzo: 9/14 JPS, 9/15 through 10/18 vacation in Chile.

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-09-02 09:11:42 by fabian.arellano)