Differences between revisions 327 and 330 (spanning 3 versions)
Revision 327 as of 2018-09-21 11:02:53
Size: 2260
Editor: MarkBarton
Comment:
Revision 330 as of 2018-09-28 13:27:48
Size: 2209
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 6: Line 6:
==== Report for week of 9/17 ====
 * Monday 9/17 was holiday.
 * We optimized the trim mass on the SF to get more balance torque with less total mass. We now have a reserve of 480 g for the yaw pico.
 * We set the SF damper gap to 6 mm.
 * We set the SR2 pitch with the optic lever, aligned the IRM and set all the OSEMs to have good clearance and midrange output.
 * We locked the SR2 suspension (except for the SF) and craned it into the tank.
 * We moved the vacuum feedthroughs over to the tank.
 * With help from Ohishi-san, we removed the First Contact from SR2.
 * Mark did an audit of all the electronics boxes and updated the item list and S-number file cards on JGWDoc.
 * Mark did an inventory of some thin arc weights and finalized the number to order (8*38 mm + 9*10 mm).
 * Panwei copied control filters over from the SR3.
 
==== Plan for week of 9/24 ====
 * Monday 9/24 is holiday (Autumn Equinox).
 * Mark, Hirata-san, Fabian, Panwei at Kamioka Tue-Fri.
==== Report for week of 9/24 ====
 * Monday 9/24 was a holiday (Autumn Equinox).
Line 22: Line 9:
 * Remove First Contact.
 * Move SR2 in-air cables.
 * Unlock and realign suspension.
 * We moved all the SR2 feedthrough and in-vacuum and in-air cables.
 * We tested all the OSEMs and most of the LVDTs. We still need to run power to the pico drivers, and test them and the steppers.
 * We unlocked and mostly realigned the suspension. The IM is sitting lower than before but can be brought up to nominal height with BF GAS offset, without any signs of anything touching. The IM also has a moderately large pitch (2.8 mrad according to the OSEMs, about 1 mrad according to the OL) and some roll, which we expect to be able to correct with some pico adjustment. The horizontal IM OSEMs are well-centered (so there is no yaw misalignment).

===== SRM =====
 * We made another attempt to set the pitch of the SRM, but weren't satisfied with how close we were able to get (target 20 mm low, achieved 23 mm), so we didn't tighten the clamps or continue to setting the pitch of the RM.

==== Plan for week of 10/1 ====
 * Mark, Hirata-san, Fabian, Panwei at Kamioka Mon-Fri.
Line 31: Line 24:

==== Plan for week of 10/1 ====
 * Mark, Hirata-san, Fabian, Panwei at Kamioka Mon-Fri.
===== SRM =====
Line 41: Line 30:
 * Enzo returns Tuesday 10/9.
Line 42: Line 32:
 * Hirata-san, Fabian and Panwei at Kamioka Tue-Fri.
===== SR2 =====
 * Enzo, Hirata-san, Fabian and Panwei at Kamioka Tue-Fri.
===== SR2/SR3 =====
Line 46: Line 36:
   * Continue installation.
Line 53: Line 44:
 * Enzo: 9/14 JPS, 9/15 through 10/8 vacation in Chile.  * Enzo: 9/15 through 10/8 vacation in Chile.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 9/24

  • Monday 9/24 was a holiday (Autumn Equinox).

SR2
  • We moved all the SR2 feedthrough and in-vacuum and in-air cables.
  • We tested all the OSEMs and most of the LVDTs. We still need to run power to the pico drivers, and test them and the steppers.
  • We unlocked and mostly realigned the suspension. The IM is sitting lower than before but can be brought up to nominal height with BF GAS offset, without any signs of anything touching. The IM also has a moderately large pitch (2.8 mrad according to the OSEMs, about 1 mrad according to the OL) and some roll, which we expect to be able to correct with some pico adjustment. The horizontal IM OSEMs are well-centered (so there is no yaw misalignment).

SRM
  • We made another attempt to set the pitch of the SRM, but weren't satisfied with how close we were able to get (target 20 mm low, achieved 23 mm), so we didn't tighten the clamps or continue to setting the pitch of the RM.

Plan for week of 10/1

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

SRM
  • Set pitch of SRM and RM, tighten clamps, remove winch system.
  • Weigh IM/... section.
  • Build up SS to BF level.
  • Add BF.
  • Suspend IM and tweak height/balance.
  • Cable/test BF.
  • Install IRM.
  • Install/cable/test IM OSEMs.

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
  • Continue installation.

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 2022-07-01 13:49:37 by fabian.arellano)