Differences between revisions 176 and 180 (spanning 4 versions)
⇤ ← Revision 176 as of 2017-08-12 15:03:58 →
Size: 2160
Editor: MarkBarton
Comment:
← Revision 180 as of 2017-08-25 13:48:16 → ⇥
Size: 1874
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 7: Line 7:
At Kamioka (Mark, Ohishi-san, Enzo, Yoshioka-kun, Kozu-kun):
 * We finished installing the RM OSEMs and installed the new Type5-2.2 and 5-2.4 OSEM cables.
 * We hung the RM and set its pitch.
 * We doubled-checked the BS and RM pitch, tightened the clamps and removed the winch system.
 * We installed the bottom section of the security structure to protect the RM/BS.
 * We lifted the IM/RM/BS section and weighed it. It was about 1.25 kg too heavy for the new BF, so we improvised a lighter set of ballast masses.
 * We installed the section of the security structure up to the BF ring, and the BF crossbars and jacks of the assembly frame.
 * We brought in the new BF.
 * We installed the BF-IRM rods and IRM top plate.
 * We reinstalled the IM flags and other items that had been taken off to use the winch system.
 * We hooked the BF-IM rod (with hex cable clamp). (We did not unlock the BF keystone.)
 * We cabled and tested the IM-PIT, IM-ROL and IM-YAW picos and the BF FR stepper (but not, yet, the BF LVDT).		 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.
Line 20: Line 22:
==== Plan for week of 8/14 ====
Site closure: Mon, Tue<<BR>>
Vacation: Fabian (Mon-Fri)<<BR>>
Kamioka: Mark (Wed-Fri), Enzo (Wed-Fri), Yoshioka-kun (Wed, Fri), Ohishi (Thu-Fri).<<BR>>
 * Remove LBB blade units from PI, then remove blades and send for remachining.
 * Remove LBB rings from chamber and send for recleaning.
 * Unlock BF, adjust ballast masses on IM/RM/BS to correct pitch/roll/vertical.
 * Test, calibrate BF LVDT.
Mitaka: Hirata-san (Mon-Fri)<<BR>>
 * SR Stuff
Line 31: Line 23:
==== Plan for week of 8/21 ====
Vacation: Fabian (Mon)<<BR>>
Kamioka: Mark, Ohishi, Fabian (Tue-Fri), Enzo, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun.
 * Install side panels of IRM and OSEMs.
 * Route IRM OSEM cables, test/adjust IRM OSEMs.		 ==== 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.
Line 39: Line 29:
Mitaka: Hirata-san.
 * SR stuff.		  * Suspend BF/IRM/IM/RM/BS.

==== Plan for week of 9/4 ====
 * Install SF cap; route cables.
 * Lift and weigh SF/BF/IRM/IM/RM/BS.
 * Adjust SF ballast.
Line 42: Line 37:
Fabian: Fri 8/4 through Mon 8/21

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

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.

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.

Plan for week of 9/4

  • Install SF cap; route cables.
  • Lift and weigh SF/BF/IRM/IM/RM/BS.
  • Adjust SF ballast.

Vacation Info

Mark: TBD Mid-Oct

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