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| * Updated the 3D assembly model for BS (among other issues, it turned out that parts were not correctly mated near where the suspension sits on the hydraulic jacks in the tank). * Liaised with IJECT. * Made an inventory for Type B (BS and SR). * Packed and shipped second winch to Kamioka. * Packed some jigs for adjusting BF blades. * Attended NINS information security seminar. * Attended the public hearing for the Opt-IR Research Division Chief Election. * Mark and Fabian at Kamioka (plus Enzo for 2 days): * Finished rebalance of IM * Reinstalled IRM, adjusted OSEMs * Replaced broken Type 3 cable on IM-H1 OSEM. * Fixed issues with k1visbs real-time model. * Started TFs from IRM OSEMs to IRM and IM OSEMs. * Mark, Fabian and Enzo * |
* Received many parts from i-ject for BFRM (took pictures and took them into ATC cleanroom). * got quotes for PRM/SRM payload from i-ject. * Checked quotes and asked for some modifications.) * Washed parts (parts for type-A, small hexagons, screws, etc\) * Wiped 9 piano wires and sent to Kamioka for PR. * pdated Fabian's EQstop parts for BS recoilmass and updated EQstop assy drawings. * Fabian * Worked out geometry for blade adjustment. * Designed additional ballast masses for BS BF (and SR). * Mark and Enzo (at Kamioka) * Did two rounds of adjustment of the blades with help from Takahashi-san (one for position, one for frequency) * Surveyed the position of the rod using the vertical mode of the bubble level. * Got apparent improvement as judged at the IRM-IM EQ stops (but still not perfect). * Did one more round of blade adjustments (without Takahashi-san) * Got good agreement with IRM-IM EQ stops, so put BF cap on and raised the whole system to check for balance. * Found balance still fairly bad: about the same on the -X,+Y diagonal and about half on the +X,+Y diagonal (70 and 30 mm worth of motion of a single trim mass respectively; previous a bit over 70 mm each). * From the imbalance torques, calculated the offset of rod as 2.3 mm in the direction 22 degrees to the +X side of -Y. * Calculated the blade adjustments required: {-0.325194, -1.79175, 2.11695} mm * Prepared to apply adjustments (removed cap etc). |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
- Hirata-san:
- Received many parts from i-ject for BFRM (took pictures and took them into ATC cleanroom).
- got quotes for PRM/SRM payload from i-ject.
- Checked quotes and asked for some modifications.)
- Washed parts (parts for type-A, small hexagons, screws, etc\)
- Wiped 9 piano wires and sent to Kamioka for PR.
- pdated Fabian's EQstop parts for BS recoilmass and updated EQstop assy drawings.
- Fabian
- Worked out geometry for blade adjustment.
- Designed additional ballast masses for BS BF (and SR).
- Mark and Enzo (at Kamioka)
- Did two rounds of adjustment of the blades with help from Takahashi-san (one for position, one for frequency)
- Surveyed the position of the rod using the vertical mode of the bubble level.
- Got apparent improvement as judged at the IRM-IM EQ stops (but still not perfect).
- Did one more round of blade adjustments (without Takahashi-san)
- Got good agreement with IRM-IM EQ stops, so put BF cap on and raised the whole system to check for balance.
- Found balance still fairly bad: about the same on the -X,+Y diagonal and about half on the +X,+Y diagonal (70 and 30 mm worth of motion of a single trim mass respectively; previous a bit over 70 mm each).
- From the imbalance torques, calculated the offset of rod as 2.3 mm in the direction 22 degrees to the +X side of -Y.
- Calculated the blade adjustments required: {-0.325194, -1.79175, 2.11695} mm
- Prepared to apply adjustments (removed cap etc).