Differences between revisions 180 and 216 (spanning 36 versions)
⇤ ← Revision 180 as of 2017-08-25 13:48:16 →
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==== Past week report ====
At Kamioka (Mark, Ohishi-san, Enzo, Yoshioka-kun):
 * We installed the cut-down ballast mass under the IM and tweaked the IM height and balance.
 * We checked the range of the BF FR.
 * We adjusted the BF yoke by 2.5 mm to make it give ≈0 output for nominal height.
 * We found a good gain setting for the LVDT driver and calibrated the BF LVDT.
 * We set up the optical sensors facing the RM.
 * We assembled the IRM (with OSEMs) around the IM and got it mostly adjusted.
 * We changed the k1visbs model to restore the as-designed mapping of OSEMs to DAQ channels.
 * We confirmed that the BF LVDT actuation coil and the TM OSEM coils were working.
 * We connected up the IRM OSEMs (with the new Type 5-1.7 cables) but found there was an electrical issue: all the OSEMs are reading back the same constant value, around 1115.
 * We left the suspension in a state suitable for TFs from BF GAS actuation to sensing (in vertical) and from RM OSEM actuation to the optical sensors (in horizontal) over the weekend.
At Mitaka (Hirata-san):
 * Hirata-san did 2D drawings of the SR LBB rods and sent off an RFQ.
 * Hirata-san did several cost-reduction negotiations with Mirapro.		 ==== Report for week of 12/25 ====
 * Hirata-san got the L-brackets machined and washed, and installed them on the IM ring bars.
 * Shoda-san recovered the BS from the power outage on 12/25.
 * Miyakawa-san fixed an issue with the SR2 RTM which had prevented it from running.
 * Shoda-san, Hirata-san and Kozu-kun weighed the IM without ballast masses, and then added the lower masses and installed the IM on the assembly frame.
 * They cleaned the assembly frame and installed new jack receptacles on the load gauge adapter.
 * They installed the winch system on the IM, and inspected the clamp pieces for possible scratches.
 * They ran cables for the SR2 steppers and OSEMs.
 * They calibrated the BF LVDT.
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==== Report for week of 1/4 ====
 * Mark fixed a number of errors with the Type B screens.
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==== Plan for week of 8/28 ====
Kamioka: Mark (except Tue), Ohishi-san, Fabian (except Tue), Enzo (except Tue), Hirata-san, Yoshioka-kun (Fri), Kozu-kun (Thu, Fri).
 * Fix/adjust IRM OSEMs.
 * Add BF cap; cable and test BF-1 and BF-2 picos.
 * Lift and weigh BF/IRM/IM/RM/BS; adjust ballast mass.
 * Crane in SF.
 * Suspend BF/IRM/IM/RM/BS.		 ==== Report for week of 1/9 ====
 * We weighed the mirror in its box (and later the empty box), and the RM.
 * Fabian worked on the SR2/SR3/SRM mass budget and did an inventory of spare ballast masses.
 * We hung the SR2 and RM.
 * We assembled the bottom section of the security structure below the RM.
 * We cabled the RM OSEMs up to the IM.
 * Hirata-san gave up on waiting for a third quote for the blades and blade parts and started the ordering process.
 * Hirata-san got rod cable clamp parts from Takahashi-san and worked on drawings for the improved BS vertical and yaw adjusters.
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==== Plan for week of 9/4 ====
 * Install SF cap; route cables.
 * Lift and weigh SF/BF/IRM/IM/RM/BS.
 * Adjust SF ballast.		 ==== Plan for week of 1/15 ====
 * Fabian at Mitaka Monday 1/15 to inspect filter load test items.
 * All at Kamioka.
 * Shoda-san to work on readjusting PR3 and also making OSEMs.
 * Enzo and Kozu-kun to help with making OSEMs.
 * Test RM OSEMs.
  * Check coil driver is successfully driving current.
  * Time permitting, do TF test from coils to optical sensor.
 * Suspend IM using load gauge adapter, and check/adjust total mass and balance.

==== Plan for week of 1/22 ====
 * All at Kamioka
 * Bring in BF and suspend IM.
 * Route final RM/IM cables up to below BF.
 * Recheck/adjust total mass and balance.
 * Route selected cables to flange.
 * Test IM picos and BF yaw pico.

==== Plan for week of 1/29 ====
 * Enzo at Mitaka 1/29 and most of 1/30, then vacation.
 * Kozu-kun away.
 * All others at Kamioka.
 * Build IRM around IM.
 * Cable/test/adjust IM OSEMs.
 * Time permitting, do TFs from IM OSEMs to themselves and to optical sensor.
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Mark: TBD Mid-Oct  * Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30)
 * Kozu-kun 1/29-2/2

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 12/25

  • Hirata-san got the L-brackets machined and washed, and installed them on the IM ring bars.
  • Shoda-san recovered the BS from the power outage on 12/25.
  • Miyakawa-san fixed an issue with the SR2 RTM which had prevented it from running.
  • Shoda-san, Hirata-san and Kozu-kun weighed the IM without ballast masses, and then added the lower masses and installed the IM on the assembly frame.
  • They cleaned the assembly frame and installed new jack receptacles on the load gauge adapter.
  • They installed the winch system on the IM, and inspected the clamp pieces for possible scratches.
  • They ran cables for the SR2 steppers and OSEMs.
  • They calibrated the BF LVDT.

Report for week of 1/4

  • Mark fixed a number of errors with the Type B screens.

Report for week of 1/9

  • We weighed the mirror in its box (and later the empty box), and the RM.
  • Fabian worked on the SR2/SR3/SRM mass budget and did an inventory of spare ballast masses.
  • We hung the SR2 and RM.
  • We assembled the bottom section of the security structure below the RM.
  • We cabled the RM OSEMs up to the IM.
  • Hirata-san gave up on waiting for a third quote for the blades and blade parts and started the ordering process.
  • Hirata-san got rod cable clamp parts from Takahashi-san and worked on drawings for the improved BS vertical and yaw adjusters.

Plan for week of 1/15

  • Fabian at Mitaka Monday 1/15 to inspect filter load test items.
  • All at Kamioka.
  • Shoda-san to work on readjusting PR3 and also making OSEMs.
  • Enzo and Kozu-kun to help with making OSEMs.
  • Test RM OSEMs.
    • Check coil driver is successfully driving current.
    • Time permitting, do TF test from coils to optical sensor.
  • Suspend IM using load gauge adapter, and check/adjust total mass and balance.

Plan for week of 1/22

  • All at Kamioka
  • Bring in BF and suspend IM.
  • Route final RM/IM cables up to below BF.
  • Recheck/adjust total mass and balance.
  • Route selected cables to flange.
  • Test IM picos and BF yaw pico.

Plan for week of 1/29

  • Enzo at Mitaka 1/29 and most of 1/30, then vacation.
  • Kozu-kun away.
  • All others at Kamioka.
  • Build IRM around IM.
  • Cable/test/adjust IM OSEMs.
  • Time permitting, do TFs from IM OSEMs to themselves and to optical sensor.

Vacation Info

  • Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30)
  • Kozu-kun 1/29-2/2

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