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| * Type B Past Week Summary, weeks of 9/19 and 9/26 * Fabian, Mark and Kuwahara-kun did BS installation at Kamioka: * The BS clean booth was modified 9/20-21 to allow crane access. The area was fairly clean when Fabian inspected it on 9/26, but there were lots of metal flakes stuck to tape holding foil over the slit in the top of the clean bag. * Mark created a new Type B rtcds model and MEDM screens for the BS, adapting the TypeBb/PR3. * Mark and Kokeyama-san debugged the new model, fixing several issues. * Kuwahara-kun derived OSEM2EUL and EUL2OSEM matrices. * Mark set up OSEMINF filters using measured OSEM calibration data to return outputs in µm. * Mark took free-swing data on the TM stage to get the pendulum mode frequencies for comparison to the SUMCON model. * Mark and Fabian debugged the coil output to the OSEMs. (At first the coil drive was not giving output because it did not have BIO inputs and so was reading the test input, not the main input. And for a while output failed because of a loose cable to the sat amp.) * Mark took fixed-sine TFs to check the polarity of the coil-magnet combinations. * Hirata-san: * Finished 3D CAD of SRM in tanks (but some work was lost due to a hard disk crash). * Did 3D and 2D for new maraging rods, stub flags for PR/SR (ditto re hard disk). * Measured/tested Type A BF #8 and started assembling #9. * Longer term to-do list * Do Inventor assembly for SRx in chamber and on assembly frame (Hirata) - SR2/SR3 DONE, SRM ongoing. * Part "disk security" top has to be modified - screw positions do not match. * Write more of payload assembly procedure (Fabian) - ONGOING * Write more of BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] (Mark) - ONGOING * Lower breadboard installation to be incorporated into the procedure document. * Work on BS simulation (Fabian) * Do BS Simulink model (Mark, Kokeyama) - TM/IM/BF level DONE * Do 2D drawings of SR2 parts (Hirata) * Redesign SRx IM wire clamps for larger prisms, remachined RMs * Order SRM/PRM parts (Hirata/Shoda) * Order SRx fasteners (Hirata) |
=== Type B (Mark) === ==== Past week report ==== At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun): * We put lock nuts on the F0 FR and calibrated the F0 LVDT against FR position and keystone height. * Enzo traced the issue with the geophones to a specific cable. * We measured the BF and F0 GAS resonant frequencies. * We adjusted the spacing of the SR damper. * We double-checked the BS pitch with the OL. * We debugged the PI yaw mechanism. We managed to get the return spring properly adjusted, but the stepper motor tends to jam because of the strange design. * '''We prepared the suspension for lifting and craned it into the tank.''' * Hirata-san fixed an issue with one of the nailheads on the LBB intermediate ring support rods not properly seating, by removing the rod and reinstalling it upside down (with the problem nailhead in a less critical position). * Enzo and team moved all the in-air cables from the assembly frame to the tank. * Fabian and Ohishi-san unlocked the bottom section of the suspension and got it hanging freely. ==== Plan for week of 9/25 ==== Mark, Fabian, Enzo (Mon, Tue), Ohishi-san (Tue, Fri), Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun * Finish moving in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings). * Unlock rest of suspension and readjust. * Debug electronics. * Unclamp LBB ring "sandwich" so LBB Cu ring is suspended on upper rods. * Install LBB lower rods and hook LBB. * Adjust LBB damper Cu-magnet gap. * Measure required ballast for LBB. * Remove First Contact, try OL. * Prepare for SR2 work. |
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| ==== Plan for week of 10/2 ==== Kamioka: Mark, Enzo, Fabian, Ohishi-san. * TFs etc. Mitaka: Hirata-san? * SF design/purchasing. ==== Vacation Info ==== Mark: 10/16-24 Enzo: 9/27-29 |
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, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):
- We put lock nuts on the F0 FR and calibrated the F0 LVDT against FR position and keystone height.
- Enzo traced the issue with the geophones to a specific cable.
- We measured the BF and F0 GAS resonant frequencies.
- We adjusted the spacing of the SR damper.
- We double-checked the BS pitch with the OL.
- We debugged the PI yaw mechanism. We managed to get the return spring properly adjusted, but the stepper motor tends to jam because of the strange design.
We prepared the suspension for lifting and craned it into the tank.
- Hirata-san fixed an issue with one of the nailheads on the LBB intermediate ring support rods not properly seating, by removing the rod and reinstalling it upside down (with the problem nailhead in a less critical position).
- Enzo and team moved all the in-air cables from the assembly frame to the tank.
- Fabian and Ohishi-san unlocked the bottom section of the suspension and got it hanging freely.
Plan for week of 9/25
Mark, Fabian, Enzo (Mon, Tue), Ohishi-san (Tue, Fri), Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun
- Finish moving in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).
- Unlock rest of suspension and readjust.
- Debug electronics.
- Unclamp LBB ring "sandwich" so LBB Cu ring is suspended on upper rods.
- Install LBB lower rods and hook LBB.
- Adjust LBB damper Cu-magnet gap.
- Measure required ballast for LBB.
- Remove First Contact, try OL.
- Prepare for SR2 work.
Plan for week of 10/2
Kamioka: Mark, Enzo, Fabian, Ohishi-san.
- TFs etc.
Mitaka: Hirata-san?
- SF design/purchasing.
Vacation Info
Mark: 10/16-24 Enzo: 9/27-29