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| * Type B Past Week Summary * Fabian took photos of the cleanroom in the ATC to help decide whether it is a good place to assemble PIs for Type A/B. * Hirata-san wiped one set each of wires for the BS and RM (addition sets pending). * Hirata-san washed remachined locking parts for the IM and screws for jacks. * Hirata-san liaised with Ikenoue-san of ATC to get new winch parts designed for the new wire thicknesses. Ikenoue-san provided updated designs for checking. * Hirata-san worked on the Inventor 3D assembly of the SR2. * The scale for checking the masses of the IM parts was received. * Fabian and Hirata-san identified an issue with the lock screws between the IM and IRM. The screws were slightly too large, and correcting the size with a die caused large flakes of the black coating to come off. (These screws were ordered before the current screw policy was instituted.) Hirata-san will order better screws from Misumi and have additional machining done on them. * Fabian tracked down the calibration factors for the geophones and generated a calibrated plot. * Type B ongoing issues * OSEMs * Akutsu-san is working to get wide-mouth OSEMs ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1853|2 assembled]]; first 4 expected to be assembled and washed by 8/8) * Longer cables for BF->PI and SF->PI. * Connectors RECEIVED, cables being made. * SR machining test ongoing. * Lower breadboard stuff * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss. * Breadboard springs (in manufacture, expected end of July) * Documents * 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]] * To-do list during Mark's vacation * Weigh IM/RM/IRM (Fabian, Hirata) - DONE but anomalies found. * Pack/ship IM/RM/IRM to Kamioka (Hirata/Fabian). * Analyze geophone data (Fabian/Shoda) - data taken by Shoda-san; Fabian to find calibration factors. * Remove glue from dummy BS face (Fabian) - partly done. * Reglue flags and prisms (Tatsumi, Fabian) * Clean wire for BS and RM (Hirata) - DONE * Get new winch parts for new wire diameters - design received from Ikenoue-san * Do fit/function test of winches (Fabian/Hirata) * Ship winches to Kamioka (Hirata/Fabian) * Work on BS simulation (Fabian) * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - ONGOING. * Write more of payload assembly procedure (Fabian) * Write more of main assembly procedure (Mark) * Longer term to-do list * Do BS Simulink model (Mark, Kokeyama) * 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) * Check SR RM machining test progress (Hirata) |
=== Type B (Mark) === ==== Report for week of 3/12 ==== * We helped Mirapro close up the BS tank, and did last minute checks and adjustments, including using the fishing rods to reset the GAS keystones to mid-range according to the LVDTs. (The F0 had risen so far (≈7 mm) due to temperature changes that it was touching the upper keystone stop screws and defeating the vibration isolation. We operated the F0 FR manually while the tank lid was off.) * We installed electronic boxes in the SR3 and SRM racks. Enzo set the phases and gains on the LVDT drivers for both racks. Rack internal cabling and in-air cabling to SR3 still needs to be done. * Hirata-san disassembled two BFs (one SF BF with a tilted keystone and the BS Test Hang BF) and characterized all 10 available SR BF blades. He found they fell into a group of 6 strong ones and a group of 4 weak ones, so he divided the 6 into two matched sets and rebuilt the two filters. * We noticed that the bottom level of SR2 suspension had developed a significant yaw (enough to foul on the security structure), probably introduced when we picked the chain up to weigh it, so we lifted the suspension again and corrected it. * We aligned the SR2 ready for TFs. We noticed that the IM/... section had a noticeable roll (≈20 mrad) but we were unable to correct it with the IM roll pico (the pico runs but the roll does not change, probably because there is too much friction for the mass return spring). We will see if the TFs look OK and then decide whether to try correcting the roll. * We gathered items for OSEM assembly by Enzo, Shoda-san and others at Mitaka next week, and for geophone assembly by Fujii-kun and Kozu-kun at Kamioka. Hirata-san ordered some M8x35 screws that we didn't have enough of. * We took delivery of the blade bases for the LBB dampers. * Hirata-san packed up two SF caps (the original one from the SR2 SF) and a spare, for remachining by Mirapro. He also packed up the dummy BS and arranged for Ishizaki-san to take it to Mitaka for soaking off of the sapphire prisms. ==== Plan for week of 3/19 ==== * Fujii-kun and Tanioka-kun join. * Mark at LVC meeting * Fujii-kun at Kamioka (including Wed 3/21) * Kozu-kun at Kamioka Mon-Tue. * All others at Mitaka * -- * SR2 TFs and control loop development (Shoda-san and Enzo). * Assemble four geophone pods (Fujii-kun and Kozu-kun at Kamioka). * Make two sets of IM OSEMs (Shoda-san and Enzo) * Make last in-air pico adapter cable (Enzo). * Make three in-air stepper splitter cables for SR2, SR3 and SRM (Enzo). * Set up dummy BS prism removal (Hirata-san). ==== Plan for week of 3/26 ==== * Mark vacation. * Shoda-san at Mitaka * Others at Kamioka * -- * Lay SR3 in-air cabling (Enzo +1). * Finish rebuild of second BF (Hirata-san). * SF Check (Hirata-san). * Check load capacity. * Check fit of caps. * Add cable clamps to bases. * Add cable clamps and Cu segments to caps (only if they fit well). * Cable LVDTs and steppers. ==== To-Do Lists, Schedule ==== * [[KAGRA/Subgroups/VIS/TypeB/March2018]] * [[KAGRA/Subgroups/VIS/TypeB/April2018]] * [[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 ==== * Mark at LVC, then vacation, 3/18 (Sun) - 4/1 (Sun) * Fabian vacation, 3/26-4/27 (then gone). |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 3/12
- We helped Mirapro close up the BS tank, and did last minute checks and adjustments, including using the fishing rods to reset the GAS keystones to mid-range according to the LVDTs. (The F0 had risen so far (≈7 mm) due to temperature changes that it was touching the upper keystone stop screws and defeating the vibration isolation. We operated the F0 FR manually while the tank lid was off.)
- We installed electronic boxes in the SR3 and SRM racks. Enzo set the phases and gains on the LVDT drivers for both racks. Rack internal cabling and in-air cabling to SR3 still needs to be done.
- Hirata-san disassembled two BFs (one SF BF with a tilted keystone and the BS Test Hang BF) and characterized all 10 available SR BF blades. He found they fell into a group of 6 strong ones and a group of 4 weak ones, so he divided the 6 into two matched sets and rebuilt the two filters.
- We noticed that the bottom level of SR2 suspension had developed a significant yaw (enough to foul on the security structure), probably introduced when we picked the chain up to weigh it, so we lifted the suspension again and corrected it.
- We aligned the SR2 ready for TFs. We noticed that the IM/... section had a noticeable roll (≈20 mrad) but we were unable to correct it with the IM roll pico (the pico runs but the roll does not change, probably because there is too much friction for the mass return spring). We will see if the TFs look OK and then decide whether to try correcting the roll.
- We gathered items for OSEM assembly by Enzo, Shoda-san and others at Mitaka next week, and for geophone assembly by Fujii-kun and Kozu-kun at Kamioka. Hirata-san ordered some M8x35 screws that we didn't have enough of.
- We took delivery of the blade bases for the LBB dampers.
- Hirata-san packed up two SF caps (the original one from the SR2 SF) and a spare, for remachining by Mirapro. He also packed up the dummy BS and arranged for Ishizaki-san to take it to Mitaka for soaking off of the sapphire prisms.
Plan for week of 3/19
- Fujii-kun and Tanioka-kun join.
- Mark at LVC meeting
- Fujii-kun at Kamioka (including Wed 3/21)
- Kozu-kun at Kamioka Mon-Tue.
- All others at Mitaka
- --
- SR2 TFs and control loop development (Shoda-san and Enzo).
- Assemble four geophone pods (Fujii-kun and Kozu-kun at Kamioka).
- Make two sets of IM OSEMs (Shoda-san and Enzo)
- Make last in-air pico adapter cable (Enzo).
- Make three in-air stepper splitter cables for SR2, SR3 and SRM (Enzo).
- Set up dummy BS prism removal (Hirata-san).
Plan for week of 3/26
- Mark vacation.
- Shoda-san at Mitaka
- Others at Kamioka
- --
- Lay SR3 in-air cabling (Enzo +1).
- Finish rebuild of second BF (Hirata-san).
- SF Check (Hirata-san).
- Check load capacity.
- Check fit of caps.
- Add cable clamps to bases.
- Add cable clamps and Cu segments to caps (only if they fit well).
- Cable LVDTs and steppers.
To-Do Lists, Schedule
Vacation Info
- Mark at LVC, then vacation, 3/18 (Sun) - 4/1 (Sun)
- Fabian vacation, 3/26-4/27 (then gone).