Differences between revisions 141 and 166 (spanning 25 versions)
⇤ ← Revision 141 as of 2017-05-12 13:38:40 →
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← Revision 166 as of 2017-07-14 13:32:20 → ⇥
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Deletions are marked like this. Additions are marked like this.
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At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san): At Kamioka (Mark, Enzo, Yoshioka-kun):
 * We experimented with rearranging the arc weights to accommodate the magic wands and came up with a suitable scheme.
 * We used spare arc weights as extra ballast on the LBB to get it to float, and measured the height for a known load.
 * We put the blocks back under the LBB and unhooked it.
 * We moved the suspension from the tank back to the assembly frame.
 * We craned the LBB rings down onto the LBB but did not remove them yet. (This however is the last crane work in the tank until reinstallation, so the lid does not have to come off again and the pallet can be used for the PI.)
 * We put the crossbars back in the assembly frame underneath the SF and BF (and corrected an error in the height of the BF ones).
 * We checked the centering of the security frame in the assembly frame and disconnected it from the PI. One M12x35 screw galled after a few turns and will need attention.
 * Enzo started setting up the SR3 rack (with help from Yamamoto-san).
 * We received the real BS optic and gluing tools, and glued the disks and rods into the modified magnet jigs. We also tried the re-made secondary prisms in the gluing jigs and made shims to hold them more securely.
Line 9: Line 18:
 * We counted the used/broken/unused/need cables for Type B.
 * Hirata-san and Mark installed blades in three LBB blade units.
 * Hirata-san checked the LBB blade units to see how badly the blade tips were misaligned. The bases will need to be moved towards the clamp end by 21 mm. It is probably not feasible to turn the screw holes into slots, so an adapter part will need to be designed.
 * We checked that the new in-vacuum geophone cables that Takahashi-san had got for us were the proper new-style ones. (Thus we will need in-air descrambler cables.)
 * Shoda-san sent Enzo a document by Joris on the tuning of the LVDTs, so he stated working through it. He also researched the specifications of all the coils (PI and SF as well as BF.)
 * We found the damper magnets and the template for placing the magnets on the ring for the SF.
 * Hirata-san installed and wired up the PI yaw stepper. The vertical stepper still needs wiring, and the horizontal stepper wiring needs to be made vacuum-compatible.
 * We installed safety bars on the ±X side of the assembly frame about 3 m off the floor, so they are at waist height for a person standing on one of the tall ladders. The one on the +X side will be very good for safety where it is, but the one on the -X side will need re-doing: it is too close and not very securely attached because of interference from vacuum pump cabling.
 * We unlocked the inverted pendulum and experimented with adding weight. It was still stable with 4 layers of arc weights.
 * We also experimented with getting both the IP centered and the security structure vertical (so that the suspension hang centrally within it). We managed to get it all right with a combination of leveling the PI with the jacks and moving the IP with the fishing rods.
 * Adjusting the verticality of the SS had left the bottom of it off-center in the assembly frame, so we picked the entire system up with the crane and moved it in +Y and -X a few mm to re-center it.
 * We started to remove the PI so we could do various adjustments (check the SF LVDT, reconfigure the Cu damper, add the hex cable clamp on the rod and hang the magnet disk for the SF damper) but gave up when the PI-SF jammed in the SF.		 At Mitaka (Fabian and Hirata-san):
 * Hirata-san shipped the optic and gluing tools to Kamioka.
 * Hirata-san did drawings and RFQs for IM/BF/SF ballast masses
 * Fabian worked on the SRx assembly frame.
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==== Plan for week of 7/18 ====
Full team at Kamioka from Tue-Fri, except Hirata-san (Tue-Wed only).
 * Glue prisms/magnets on BS.
 * Dismantle suspension.
 * Finish setting up filter service area (mostly already done by Mirapro).
 * Move BF to filter service area, start rebuild.
Line 23: Line 30:
==== Plan for coming weeks ====
For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]].		 ==== Plan for week of 7/24 ====
Full team at Kamioka from Mon-Fri, except Hirata-san (Tue-Fri) and Enzo (vacation).
 * Finish BF rebuild.
 * Recheck alignment of assembly frame and centering of optical table.
 * Install IM, suspend BS and RM.
Line 26: Line 36:
Week of 5/15:
 * Enzo from Tuesday 5/16 (driving test), rest of team from Monday.
 * Fix PI-SF rod jamming.
 * Remove PI and SF cap.
 * Continue debugging SF LVDT.
 * Reconfigure Cu damper ring on SF.
 * Add magnets to upper SF damper ring.
 * Add cable clamps on the PI (a few places are inaccessible when the PI is on the assembly frame).
 * Reinstall PI, this time with rods and damper ring.
 * Reinstall PI-SF rod, this time with hex cable clamp.
 * Prepare for PR2 bellows removal on 5/15 (move table with tools).
 * Cable/test PI horizontal LVDTs and steppers.
 * Install/cable/test geophones.
 		 Vacation Info:
Hirata-san: Thu 7/20 through Mon 7/24
Enzo: Sat 7/22 through Sun 8/6
Fabian: Fri 8/4 through Mon 8/21
Mark: TBD Mid-Oct

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Enzo, Yoshioka-kun):

  • We experimented with rearranging the arc weights to accommodate the magic wands and came up with a suitable scheme.
  • We used spare arc weights as extra ballast on the LBB to get it to float, and measured the height for a known load.
  • We put the blocks back under the LBB and unhooked it.
  • We moved the suspension from the tank back to the assembly frame.
  • We craned the LBB rings down onto the LBB but did not remove them yet. (This however is the last crane work in the tank until reinstallation, so the lid does not have to come off again and the pallet can be used for the PI.)
  • We put the crossbars back in the assembly frame underneath the SF and BF (and corrected an error in the height of the BF ones).
  • We checked the centering of the security frame in the assembly frame and disconnected it from the PI. One M12x35 screw galled after a few turns and will need attention.
  • Enzo started setting up the SR3 rack (with help from Yamamoto-san).
  • We received the real BS optic and gluing tools, and glued the disks and rods into the modified magnet jigs. We also tried the re-made secondary prisms in the gluing jigs and made shims to hold them more securely.

At Mitaka (Fabian and Hirata-san):

  • Hirata-san shipped the optic and gluing tools to Kamioka.
  • Hirata-san did drawings and RFQs for IM/BF/SF ballast masses
  • Fabian worked on the SRx assembly frame.

Plan for week of 7/18

Full team at Kamioka from Tue-Fri, except Hirata-san (Tue-Wed only).

  • Glue prisms/magnets on BS.
  • Dismantle suspension.
  • Finish setting up filter service area (mostly already done by Mirapro).
  • Move BF to filter service area, start rebuild.

Plan for week of 7/24

Full team at Kamioka from Mon-Fri, except Hirata-san (Tue-Fri) and Enzo (vacation).

  • Finish BF rebuild.
  • Recheck alignment of assembly frame and centering of optical table.
  • Install IM, suspend BS and RM.

Vacation Info: Hirata-san: Thu 7/20 through Mon 7/24 Enzo: Sat 7/22 through Sun 8/6 Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct

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