Differences between revisions 299 and 325 (spanning 26 versions)
⇤ ← Revision 299 as of 2018-06-29 11:15:08 →
Size: 2665
Editor: MarkBarton
Comment:
← Revision 325 as of 2018-09-13 15:39:54 → ⇥
Size: 3728
Editor: EnzoTapia
Comment:
Deletions are marked like this. Additions are marked like this.
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==== Report for week of 6/18 ====
 * We powered down the Type B racks as a precaution against possible loss of power during work on Tuesday, and later powered them up again.
 * We put a flange cover over the hole in the floor near the filter tuning area as a temporary safety measure. We later managed to entirely close the part of the hole that was not covered by the filter, by moving the filter towards the outside and using short floor panels from SR2 on the tank side.
 * We removed the SR3 PI from the filter tuning area and brought in the SR2 one.
 * We put magnets on the SR damper magnet ring to match the two Cu segments we were using.
 * We craned the SR3 PI into the AF, connected it to the security structure, and hooked the SF/... section and the SF damper magnet ring.
 * At first the F0 did not rise, and we realized that we had 2 kg less margin than we originally thought because we had not allowed for the PI-SF rod receptacle, the top disk which holds the yaw stepper mechanism, or the stepper itself.
 * However we were able to try the redesigned PI fishing rod, parts for which had just arrived. The optional strong CuBe spring in the new arrangement gave plenty of extra lift, so that we now have about 5 kg of margin. We did have to move the yoke to work around the problem that the CuBe spring tends to tilt the keystone, but we got it moving freely. We will also have to compress the blades some more to compensate for the extra stiffness, which caused the frequency to rise from 0.5 Hz to 0.9 Hz. 		==== Report for week of 9/10 ====
 * We finish the invacuum and in air cabling for SR2, but the in-vacuum cables for Geophones and F0 Yaw stepper motor are just temporary and will be replaced later once the suspension is inside the tank.
 * We checked all the motors:
       * IM picos, BF picos.
       * BF Stepper (Fishing rod), SF Stepper (SF Fishing rod), F0 Stepper (F0 Fishing rod).
       * IP Steppers (Horizontal fishing rods).
 * We use the Steppers to set to nominal height the BF and SF, but for the SF we culd not move it too much and it is still too low.
 * We set up the temporary oplev for SR2.
 * We checked the pitch of the optics. The current pitch is:
 * We tried to check the TM actuators but there is a problem with the MEDM screens that we need to fix next week.
 * We measured TFs of the GAS filters and the 6 DoF of the IM. It seems to be healthy.
 * We set the F0 stepper to middle position.
 * ...
Line 15: Line 20:
=== Type B (Mark) ===
==== Report for week of 9/3 ====
 * We did more in-vacuum and in-air cabling for SR2 and got nearly everything connected.
 * We debugged the IM OSEMs and fixed two broken in-vacuum cables and some mislabeled in-air cables.
 * We debugged an issue with the IP LVDTs and discovered it was a broken interface card D1402829 in the LVDT driver. We made up a working chassis with the original two driver cards, so we didn't have to reset all the phases and gains.
 * We reset the IP FRs to midrange.
 * We added a basic set of arc weights and recentered the IP. We then adjusted the verticality of the security structure.
 * We relocked the IP temporarily, unlocked the SF/... section and aligned the IM OSEMs.
 * We powered down the BS, SR3 and SR2 electronics in preparation for the power outage.
Line 16: Line 30:
==== 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.
 * --
 * Continued tuning of filter in PI #3 for SR3.
 * Building and tuning of filter in PI #1 for SR2 (time permitting).
 * Lots of cable routing and testing.
 * Install geophones and arc weights.		 ==== Plan for week of 9/10 ====
 * Monday 9/10 is scheduled power outage.
 * Mark in US (job interview).
 * Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Tue-Fri.
 * Enzo at Kamioka Tue-Thu, then JPS Meeting Fri, then vacation.
===== Etc =====
 * Recover from power outage.
===== SR2 =====
 * Calibrate F0 LVDTs.
 * Calibrate IP LVDTs.
 * Cable geophones and any other remaining PI items.
 * Finish in-air cabling (sort out and relabel rack and feedthrough ends of any repurposed cables).
 * Do basic go/no-go test of electronic items.
 * Check SF keystone height and offload with FR as necessary.
 * Adjust ballast/trim mass of SF, with reserve for yaw stepper.
 * Set SF damper magnet ring height.
 * Check/tweak optic pitch.
 * TFs.
==== Plan for week of 9/17 ====
 * Monday 9/17 is holiday (Respect for the Aged Day).
 * Enzo on vacation.
 * Mark, Hirata-san, Fabian, Panwei at Kamioka Tue-Fri.
===== SR2 =====
 * Crane SR2 into tank.
 * Move SR2 in-air cables.
 * Remove First Contact.
 * Unlock and realign suspension.
===== SRM =====
 * Set pitch of SRM and RM, tighten clamps, remove winch system.
 * Weigh IM/... section.
 * Build up SS to BF level.
 * Add BF.
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==== Plan for week of 7/9 ====
 * Mark, Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri.
 * --
 * Lock suspension.
 * Remove tank lid and raise LBB damper rings.
 * Crane suspension into tank.		 ==== Plan for week of 9/24 ====
 * Monday 9/24 is holiday (Autumn Equinox).
 * Mark, Hirata-san, Fabian, Panwei at Kamioka Tue-Fri.
 * Suspend IM and tweak height/balance.
===== SRM =====
 * Cable/test BF.
 * Install IRM.
 * Install/cable/test IM OSEMs.
Line 39: Line 78:
 * 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.		  * Mark: 9/10-14 (job interview in US).
 * Enzo: 9/14 JPS, 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 9/10

  • We finish the invacuum and in air cabling for SR2, but the in-vacuum cables for Geophones and F0 Yaw stepper motor are just temporary and will be replaced later once the suspension is inside the tank.
  • We checked all the motors:
    • IM picos, BF picos.
    • BF Stepper (Fishing rod), SF Stepper (SF Fishing rod), F0 Stepper (F0 Fishing rod).
    • IP Steppers (Horizontal fishing rods).
  • We use the Steppers to set to nominal height the BF and SF, but for the SF we culd not move it too much and it is still too low.
  • We set up the temporary oplev for SR2.
  • We checked the pitch of the optics. The current pitch is:
  • We tried to check the TM actuators but there is a problem with the MEDM screens that we need to fix next week.
  • We measured TFs of the GAS filters and the 6 DoF of the IM. It seems to be healthy.
  • We set the F0 stepper to middle position.
  • ...

Type B (Mark)

Report for week of 9/3

  • We did more in-vacuum and in-air cabling for SR2 and got nearly everything connected.
  • We debugged the IM OSEMs and fixed two broken in-vacuum cables and some mislabeled in-air cables.
  • We debugged an issue with the IP LVDTs and discovered it was a broken interface card D1402829 in the LVDT driver. We made up a working chassis with the original two driver cards, so we didn't have to reset all the phases and gains.
  • We reset the IP FRs to midrange.
  • We added a basic set of arc weights and recentered the IP. We then adjusted the verticality of the security structure.
  • We relocked the IP temporarily, unlocked the SF/... section and aligned the IM OSEMs.
  • We powered down the BS, SR3 and SR2 electronics in preparation for the power outage.

Plan for week of 9/10

  • Monday 9/10 is scheduled power outage.
  • Mark in US (job interview).
  • Hirata-san, Fabian, Kozu-kun, Panwei at Kamioka Tue-Fri.
  • Enzo at Kamioka Tue-Thu, then JPS Meeting Fri, then vacation.

Etc
  • Recover from power outage.

SR2
  • Calibrate F0 LVDTs.
  • Calibrate IP LVDTs.
  • Cable geophones and any other remaining PI items.
  • Finish in-air cabling (sort out and relabel rack and feedthrough ends of any repurposed cables).
  • Do basic go/no-go test of electronic items.
  • Check SF keystone height and offload with FR as necessary.
  • Adjust ballast/trim mass of SF, with reserve for yaw stepper.
  • Set SF damper magnet ring height.
  • Check/tweak optic pitch.
  • TFs.

Plan for week of 9/17

  • Monday 9/17 is holiday (Respect for the Aged Day).
  • Enzo on vacation.
  • Mark, Hirata-san, Fabian, Panwei at Kamioka Tue-Fri.

SR2
  • Crane SR2 into tank.
  • Move SR2 in-air cables.
  • Remove First Contact.
  • Unlock and realign suspension.

SRM
  • Set pitch of SRM and RM, tighten clamps, remove winch system.
  • Weigh IM/... section.
  • Build up SS to BF level.
  • Add BF.

Plan for week of 9/24

  • Monday 9/24 is holiday (Autumn Equinox).
  • Mark, Hirata-san, Fabian, Panwei at Kamioka Tue-Fri.
  • Suspend IM and tweak height/balance.

SRM
  • Cable/test BF.
  • Install IRM.
  • Install/cable/test IM OSEMs.

To-Do Lists, Schedule

Vacation Info

  • Mark: 9/10-14 (job interview in US).
  • Enzo: 9/14 JPS, 9/15 through 10/8 vacation in Chile.

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