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| * Mark, Fabian and Enzo continued BS Test Hang work: * We shipped BS mirror box parts to Shoda-san and components for a new LVDT cable to Hirata-san. * We posed for pictures of the BS by a team from National Geographic. * We installed the BF fishing rod stepper motor adaptor cable. * We tried to install the BF LVDT cable but first we encountered trouble routing it, and then several wires broke at the D-Sub end. * We laid 6 in-air cables from the tank to the PR2 rank for BF and SF picos, steppers and LVDTs. * We lifted the BF/IRM/IM/RM/BS section to weigh it and check its balance. * It was 195.6 kg, which is 18 kg(!) less than the capacity of the SF. * There was a major imbalance in roll: with all four built-in trim masses moved up the +Y end, it still needed 270 g of extra trim mass to be level. This can probably be made up easily by designing the 18 kg of extra mass appropriately. * Unfortunately when we put the payload, the IM was slightly yawed and ended up on the horizontal EQ stop screws. This let the IM-BF maraging rod go slack, which disturbed the leveling of the IM (because every time it is picked up the maraging rod settles in a different place, giving a different suspension point). * We removed the end panels of the IRM to get access to the IM and rearranged the trim mass on the the IM to get it balance to bubble-level precision. (We still need to do fine pitch adjustment with the OL so that the BS is at the right angle, secure the trim mass properly and replace the IRM panels and OSEMs.) * Miyakawa-san and Yamamoto-san redid the cabling from the computer room to the PR2 rack and expected to finish by lunchtime on Friday. * Hirata-san * Did parts and fastener lists for the SR payload. * Did a 3D model with the SR suspension on the BS assembly frame (to help Mark make adjustments to the frame design). * Did 2D drawings of Fabian's concept for BS EQ stop parts. * Did a 3D model of a wire clamp with replaceable jaw parts (to avoid having to reuse parts with scars from pressure). * Did 2D drawings of a new wire clamps for on top of the BS and SR RMs. |
=== Type B (Mark) === ==== Report for week of 5/28 ==== * Enzo tested the LVDT driver repaired by Tanaka-san - it was fine. * Fujii-kun and Enzo finished assembling a batch of 4 geophones and took test data. * Hirata-san modified some Promec masses (drilling out the threads on 2 of 4 holes) so we could use two layers of them inside the BF. * Hirata-san installed maraging rod receptacles in the LBB damper rings, and in the bottom of PIs #3 and #1 (for the SF damper rings). * After consulting with various people, Hirata-san installed the second half of the LBB top ring in the chamber, simply omitting the pillar and screw associated with the badly threaded hole. * Hirata-san took delivery of the screws for the LBB blade units, made up 9 blade units and installed 6 of them on PI #3 and #1 (for SR3 and SR2). * Hirata-san made up a set of PI cable clamps and installed them on PI #3 (for SR3). * Hirata-san removed the prototype blades from PI #3 to get ready for testing the final blades. * We located the #355 disk and #356 poles for the next level of the security structure up to the SF and installed the poles. * We installed ballast mass in the BF. After some trial and error we settled on 16 Promec masses (7.1 kg) inside the BF and 5 D1808104-4 and 3 D1808104-5 masses (540 g) on the cap. * Enzo did several rounds of TFs on the BF/... section of the suspension, and ins ==== Plan for week of 5/28 ==== * Mark, Enzo at Kamioka Mon-Fri. * Hirata-san at Kamioka Tue-Fri. (Mon is monthly Mitaka day.) * Matteo at Kamioka from Tue. He may help Type B to get experience. * Kozu-kun at Kamioka Mon only. (Rest of week is job interviews.) * -- * Hirata-san will modify and clean some Promec masses at Mitaka (making threaded holes unthreaded to allow stacking). * Cable and test BF cap picos. * Install internal ballast masses. * Install cap ballast masses. * Build up security structure to SF level. * Crane in SF and remove cap. * Hook BF and adjust total ballast. * Route cables through SF-BF flying saucer up to bottom of SF. * Adjust BF trim mass. ==== Plan for week of 6/4 ==== * Mark, Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri. (Mon is NAOJ medical checkup.) * -- * Readjust payload. * Take TFs. * Add budgeted ballast mass to SF. * Cable, test SF LVDT and FR. * Characterize final F0 blades. * Finish four half-assembled geophones. ==== Plan for week of 6/11 ==== * Mark Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri (Mon is compensation day for f2f.) * -- * Rebuild F0 #3 for SR3. * Park F0 #1 (for SR2) in top of SR3 assembly frame. * Move F0 #3 behind SR3. * Make LBB blade sets (or at least 3 of 9). ==== To-Do Lists, Schedule ==== * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]] ==== Vacation Info ==== |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 5/28
- Enzo tested the LVDT driver repaired by Tanaka-san - it was fine.
- Fujii-kun and Enzo finished assembling a batch of 4 geophones and took test data.
- Hirata-san modified some Promec masses (drilling out the threads on 2 of 4 holes) so we could use two layers of them inside the BF.
- Hirata-san installed maraging rod receptacles in the LBB damper rings, and in the bottom of PIs #3 and #1 (for the SF damper rings).
- After consulting with various people, Hirata-san installed the second half of the LBB top ring in the chamber, simply omitting the pillar and screw associated with the badly threaded hole.
- Hirata-san took delivery of the screws for the LBB blade units, made up 9 blade units and installed 6 of them on PI #3 and #1 (for SR3 and SR2).
- Hirata-san made up a set of PI cable clamps and installed them on PI #3 (for SR3).
- Hirata-san removed the prototype blades from PI #3 to get ready for testing the final blades.
- We located the #355 disk and #356 poles for the next level of the security structure up to the SF and installed the poles.
- We installed ballast mass in the BF. After some trial and error we settled on 16 Promec masses (7.1 kg) inside the BF and 5 D1808104-4 and 3 D1808104-5 masses (540 g) on the cap.
- Enzo did several rounds of TFs on the BF/... section of the suspension, and ins
Plan for week of 5/28
- Mark, Enzo at Kamioka Mon-Fri.
- Hirata-san at Kamioka Tue-Fri. (Mon is monthly Mitaka day.)
- Matteo at Kamioka from Tue. He may help Type B to get experience.
- Kozu-kun at Kamioka Mon only. (Rest of week is job interviews.)
- --
- Hirata-san will modify and clean some Promec masses at Mitaka (making threaded holes unthreaded to allow stacking).
- Cable and test BF cap picos.
- Install internal ballast masses.
- Install cap ballast masses.
- Build up security structure to SF level.
- Crane in SF and remove cap.
- Hook BF and adjust total ballast.
- Route cables through SF-BF flying saucer up to bottom of SF.
- Adjust BF trim mass.
Plan for week of 6/4
- Mark, Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri. (Mon is NAOJ medical checkup.)
- --
- Readjust payload.
- Take TFs.
- Add budgeted ballast mass to SF.
- Cable, test SF LVDT and FR.
- Characterize final F0 blades.
- Finish four half-assembled geophones.
Plan for week of 6/11
- Mark Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri (Mon is compensation day for f2f.)
- --
- Rebuild F0 #3 for SR3.
- Park F0 #1 (for SR2) in top of SR3 assembly frame.
- Move F0 #3 behind SR3.
- Make LBB blade sets (or at least 3 of 9).
To-Do Lists, Schedule