Differences between revisions 345 and 347 (spanning 2 versions)
Revision 345 as of 2018-11-09 10:01:41
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Editor: MarkBarton
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Revision 347 as of 2018-11-16 11:07:58
Size: 2556
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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  * Enzo realized that he could cover the next round of needed cables with more cable soldering and did another batch. Because Yamamoto-san's lab was running low on isopropanol, Hirata-san washed them with ethanol at Mozumi.
  * Enzo worked out the optimum output resistance for the LPCDs to substitute for HPCDs with the horizontal IM OSEMs. The value was quite close to that already chosen for modified LPCDs by the cryogenic group, so we're going to standardize. The modified LPCDs will have to be operated with the internal watchdog disabled for now because it was hard-wired to 2 mA.
  * Fabian finished adding the TM OSEM cables out to the rack and tested them.
  * We ran DC power and network to the second SRM stepper driver. We still need to get one more DC power cable to replace one we borrowed from SR3. We added the remaining steppers to the Python driver and MEDM screen.
  * We reconfigured the top of the assembly frame in preparation for the PI (removing crossbars and moving jacks down).
  * Hirata-san put the magnets on the SF damper and we hooked it to the PI, craned the PI into the assembly frame and joined it to the security structure.
  * We installed the F0-SF rod and flying saucer and suspended the SF/... section. We had plenty of spare load capacity, so we changed the CuBe spring to a weaker one and put 2.3 kg of ballast on the SF cap. This leaves 1.2 kg reserve for cables and an F0 yaw stepper mechanism.
  * We reduced the trim mass on the BF to compensate for the mass of the TM OSEM cables.
  * We measured all the bounce frequencies.
  * Hirata-san put magnets on the LBB damper magnet ring, put the pieces into the tank and assembled them into a sandwich ready for craning.
  * Hirata-san and Mark craned the LBB ring sandwich to the ceiling of the lower half of the tank, and set the heights of the jacks on the upper half.
  * Fabian and Hirata-san finished the in-vacuum cabling.
  * Enzo ran DC power to the second SRM stepper driver and did the rest of the in-air cabling.
  * We're now ready for final tests of the SF/... items and initial tests of the PI items.
  * Enzo and Fujii-kun built three geophones for SRM.
  * Mark worked on the height budget.
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  * Hirata-san unclamped the LBB damper rings and suspended the LBB. It still needs ballast mass and is currently sitting high, with the blades at their upper stops.
  * Enzo experimented with [[http://www2.mpq.mpg.de/~ros/geo600_docu/soft/liso/manual.pdf|LISO]] (circuit analysis software which, among other functions, can fit measured TFs with a ZPK model) but then wrote his own fitting software in Python and used it to build Foton models of key TFs of the SR2. (These are in slots FM6-FM8 of the DAMP blocks and should not be accidentally enabled.)
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  * Cable/test IP LVDTs.
  * Cable/test IP FRs.
  * Unlock IP and center roughly.
  * Calibrate IP LVDTs.
  * Check/adjust alignment of SS.
  * Add arc weights and geophones (or extra mass equivalent to geophones).
  * Cable/test geophones.
  * Improve centering/tuning of IP and SS alignment.
 * LBB
  * Crane LBB damper ring sandwich to top of lower section of tank.
  * Set tank jacks to nominal height.
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 * Go/no-go test of all electronics items, especially SF/... section.
 * Finish vertical height check and adjust SF trim mass as required.
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 * Check/adjust alignment of SS.
Line 50: Line 37:
 * Check/adjust alignment of SS.
 * Add arc weights and geophones (or extra mass equivalent to geophones).
 * Cable/test geophones.
 * Add arc weights and geophones.
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 * Disconnect cables at feedthroughs, lock suspension.
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===== SR2 =====
 * Assist MIF team with pico cables and LBB breadboard ballast.
 * Install SR2 OL pillar and shelf (with AOL supervision)?
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 * Move SRM in-air cables over to tank.
 * Remove First Contact.
 * Unlock and align SRM.
 * Hook and roughly ballast LBB.
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Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 10/29

  • SRM
    • Hirata-san and Mark craned the LBB ring sandwich to the ceiling of the lower half of the tank, and set the heights of the jacks on the upper half.
    • Fabian and Hirata-san finished the in-vacuum cabling.
    • Enzo ran DC power to the second SRM stepper driver and did the rest of the in-air cabling.
    • We're now ready for final tests of the SF/... items and initial tests of the PI items.
    • Enzo and Fujii-kun built three geophones for SRM.
    • Mark worked on the height budget.
  • SR2
    • Enzo experimented with LISO (circuit analysis software which, among other functions, can fit measured TFs with a ZPK model) but then wrote his own fitting software in Python and used it to build Foton models of key TFs of the SR2. (These are in slots FM6-FM8 of the DAMP blocks and should not be accidentally enabled.)

To-Do Lists, Schedule

Plan for week of 11/11

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

SRM
  • Main sequence

Plan for week of 11/19

  • Friday 11/23 is Labor Thanksgiving Day.
  • Mark, Enzo and Fabian at Kamioka Mon-Thu.
  • Hirata-san at Kamioka Tue-Thu (Mitaka on Mon for Engineering Promotion Office meeting).

SRM
  • Go/no-go test of all electronics items, especially SF/... section.
  • Finish vertical height check and adjust SF trim mass as required.
  • Unlock IP and center roughly.
  • Check/adjust alignment of SS.
  • Calibrate IP LVDTs.
  • Add arc weights and geophones.
  • Improve centering/tuning of IP and SS alignment.
  • Disconnect cables at feedthroughs, lock suspension.
  • Crane into tank.

SR2
  • Assist MIF team with pico cables and LBB breadboard ballast.
  • Install SR2 OL pillar and shelf (with AOL supervision)?

Plan for week of 11/26

  • Move SRM in-air cables over to tank.
  • Remove First Contact.
  • Unlock and align SRM.
  • Hook and roughly ballast LBB.

Plan for week of 12/3

  • f2f Meeting at NAOJ - no Kamioka work.

Vacation/Event Info

  • Hirata-san at Mitaka, Mon 11/19 (Engineering Promotion Office meeting).

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