---- Suspension Condition of PRM, IMMT1/2. (Takahashi-san, Ushiba-kun) ---- IMMT1/2, PRM * Mechanical Motion * Smooth pico motion and its default position * Gaps between magnets and coils * Gaps between EQ stoppers and mirrors -> confirmed less than 1mm. * IMMT1/2 * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29314 * Yaw Pico is at near the edge. --> Acceptable * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29313 * Though the EQ stop frame on the XY stage is unstable, the jump of the TM pitch is within the Oplev range. --> Acceptable * PRM * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28380 * The balance of the TM was recovered by regluing of three magnets. * The wire cramp on the IM for the TM was tightened. * Height adjustment. * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28710 * Position measurement of the traverser. * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29366 * Electrical wirings * Coil resistances and inductances -> * * Isolation of Wiring from coils to flanges(pico and mag-coil) -> * * Cable repair for the BF damper. The lead wires were glued to prevent direct touching of the wires to the coil bobbins. * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28712 * Fixing the cable connector for SF LVDT * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28586 * Smooth Mag-coil motion and balance and TFs * Spectrum * IMMT2: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29320 * IMMT1: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29319 * PRM: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29348 * PRM: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29349 * Mirror conditions(??) * Clean around the center? * ---- Beam Path from IMC to PRM (Yokozawa-kun, and Akutsu-kun) ---- Activities: * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29261 (Finalization of IFI-IMM-PRM: Day 1 PM) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29271 (Comment to Finalization of IFI-IMM-PRM: Day 1 PM) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29273 (Finalization of IFI-IMM-PRM: Day 2) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29282 (Finalization of IFI-IMM-PRM: Day 3 AM) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29283 (Finalization of IFI-IMM-PRM: Day 3 PM) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29285 (Comment to Finalization of IFI-IMM-PRM: Day 3 PM) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29299 (Finalization of IFI-IMM-PRM: Day 4) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29308 (Finalization of IFI-IMM-PRM: Day 5) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29334 (Finalization of IFI-IMM-PRM: Day 6) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29342 (Finalization of IFI-IMM-PRM: Day 7-1) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29343 (Finalization of IFI-IMM-PRM: Day 7-2) IMC to STM1 * Beam clearance: OK STM1/2 * Mirror mount stability with cables * Beam positions on them * Trans beam from STM2 IFI to IMMT1 * IFI injection: No clipping * Beam position on IMMT1 * Trans beam of IMMT1 * No change to ISS path? * ISS beam/CWP reflection beam extracting (??) * the beam paths are clear? * The beams hit around the center of windows? * The reflected beams on the windows are dumped? IMMT1-IMMT2 * Beam clearance: no problem * Beam position on IMMT2: shifted from the center. IMMT2-PRM * Main beam/misaligned beam clearances: no problem against the beam dumper * The misaligned beam position: hits on the dumper(?) and the temp enhancement was detected. Around PRM * Beam position on PRM * IR beam in the midsize baffles(HR/AR side) Main Beam Dumper * Thermometer works: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29340 * Visual Inspection: after the IR recovery. --> https://gokagra.slack.com/archives/C015MC5U0R1/p1714622532391079 so OK. * Beam Clearance: OK with the main IR beam Beam dump(T.Akutsu) * some shiny remnant: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29343, https://klog.icrr.u-tokyo.ac.jp/osl/?r=29342 * Beam dumps were additionally added? * In basic, No Relocation was done? ---- PRM Cleaning (Hirata-san, Aso-kun) ---- PRM * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29254 (April 17): Acceptable ? * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29244 (April 16) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29228 (April 15) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29216 (April 12) * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29202 (April 11) ---- Oplev Check for PRM, IMMT1. (Yokozawa-kun) ---- Activities: * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29337 * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28916 * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28897 Beam Power * Beam Path Clearance *IMMT1 QPD centering * Calibration * Spectrum Health * Oplev beam's stray light influence * almost no light? as before. Oplev table covering * we will do this after closing. ---- ISS path ---- Check the path by Akutsu-kun * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29384 ---- Vacuum system (Kimura/Uchiyama and their selected persons) ---- Close GV btw PRM and PR3 and stad bolt nut adjustment btw PRM and PR3 * Clean inside as much as possible including the bellows duct with TMP * Check the flange seal surface condition where were opened. * KF400 flange with a Copperplate -> change with a curved flange: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29377 Decide where the elastomer/Metal gasket will be used. * Check the opened flanges and the top hut of PRM * Logistic to reinstall the bellows duct with TMP. * Sawada-sana and Mirapro members call * If you use chain block, please be careful of its fixing * Careful cramp tightening near oplevs. *