<> = Agenda/Minutes = [[https://zoom.us/j/203743987|Zoom Meeting]] ---------- = CRY+VIS Interface Meeting = Date : 13:00-14:00 Participants:　Takahashi, Sato, Ikeda, Ushiba, Miyo, Aso, Kimura, Uchiyama, Tomaru [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]] == Schedule == * IX: Oplev setting is on going. Final setting of height was scheduled on 4/26. ACC tuning is scheduled on 4/24. * IY: Remedy of the pre-isolator was postponed. * EX: Height adjustment is on going ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16535|Measurement]]). Rough setting was scheduled on 4/27. * EY: Installation of the tower will be restarted in May. Removing of the maraging rod is necessary. == Status == * Corrugate tube fixing jig: Implementation for IXV is scheduled on 4/28. * Commissioning in air: From mid. May for IX. * Commissioning in vacuum: * Acceptance check: Meeting (workshop) was set every Friday to make the acceptance check document. * PF actuator: After SC. * Jig for FC painting: * Overall commissioning: Schedule meeting was held on 4/19. * Procedure of TM height setting: Plan for IX/EX. == Discussion == ---------- = VIS Meeting = 14:00-15:00 Participants: Takahashi, Fabian, Hirata, Ishizaki, Miyo, Tanaka, Sato, Sugiyama, Terrence, Aso == Schedule == See [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Schedule|Schedule]] * Type-A team: IXV 4/26, EXV 4/28, IXV(fixing jig) 4/28 * Type-B team: PRs. '''Milestone''' * ''IMC suspensions are ready in air [40]'' will finish 2011/04/21. * ''PRs are ready in air [643]'' will finish 2011/07/09. * ''ETMX is ready in air [656]'' will finish 2021/08/25. * ''ITMX is ready in air [657]'' will finish 2021/08/31. * ''ETMY is ready in air [658]'' will finish 2021/09/16. * ''ITMY is ready in air [659]'' will finish 2021/11/08. * ''BS is ready in air [691]'' will finish 2011/11/24. * ''SRs are ready in air [663]'' will finish 2011/12/20. * ''Output suspensions are ready in air [695]'' will finish 2011/12/21. * ''TMSY is ready in air [708]'' will finish 2011/??/??. * ''TMSX is ready in air [684]'' will finish 2011/??/??. 2021/03/29 updated == Klog == '''EX''' * (!) [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16535|16535]] Height adjustment of ETMX , __ryutaro.takahashi__ '''General''' * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16506|16506]] Deleted unnecessary processes from VIS model file. , __satoru.ikeda__ '''IX''' * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16421|16421]] Height adjustment of ITMX , __ryutaro.takahashi__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16499|16499]] Comment , __ryutaro.takahashi__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16519|16519]] Comment , __ryutaro.takahashi__ '''MCE''' * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16512|16512]] MCe oplev characterization , __takaaki.yokozawa__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16525|16525]] Comment , __takaaki.yokozawa__ * (!) [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16522|16522]] Comment , __tomotada.akutsu__ '''MCF''' * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16498|16498]] Type-C simulation model , __yoichi.aso__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16501|16501]] Oplev calibration MCo , __takaaki.yokozawa__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16500|16500]] Characterization of optical lever MCi , __takaaki.yokozawa__ * (!) [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16537|16537]] MCo suspension strange , __tomotada.akutsu__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16157|16157]] Investigation of IMC suspensions , __ryutaro.takahashi__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16513|16513]] Comment , __kouseki.miyo__ '''PR3''' * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16520|16520]] Thermistor installation , __fabian.arellano__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16521|16521]] Setting the mirror to nominal height , __fabian.arellano__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16348|16348]] Tightening the locating clamps for the piano wire. , __fabian.arellano__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16502|16502]] Comment , __fabian.arellano__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16520|16520]] Thermistor installation , __fabian.arellano__ * (!) [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16533|16533]] Comment , __fabian.arellano__ * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16521|16521]] Setting the mirror to nominal height , __fabian.arellano__ * (!) [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16532|16532]] Comment , __shinji.miyoki__ * (!) [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16529|16529]] Comment , __fabian.arellano__ '''PRM''' * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16518|16518]] PRM BF-LVDT replacement , __yoichi.aso__ * (!) [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16534|16534]] Comment , __yoichi.aso__ '''SR2''' * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16509|16509]] Lowering the pre-isolator , __fabian.arellano__ This is generated by python script in /users/Miyo/dropbox/Script/scrapping/main.py. == Summary Report == === TypeA === * Checked the FR range in EX. The range of F0 was small (+/-1mm). The coupler for shaft will be replaced from a rigid type to a flex type. === TypeB === === Type-Bp PR3 === * On Tuesday * We corroborated that the horizontal line drawn on white tape was on the chamber was Terada-san's height mark. * We went ahead in trying to set the mirror to the appropriate height * We set the SF keystone to nominal height per the 3D-CAD (65.5 mm from base plate). * The mirror was at the right height when moving the BF FR all the way to its upper limit and using 30,000 counts of actuation. * This meant it is not suitable to set the SF keystone to the 3D-CAD nominal height. * On Wednesday * We installed the thermistor on the security structure pillar above the IRM. * Just for the record, we measured the height of the mirror when the SF was at nominal height per the 3D-CAD and the BF was at the setpoint: * It was 2.2 mm below. * There's also some roll: there's 1 mm difference in height between the RM sides. * Then we moved the SF keystone up with the fishing rod until the mirror asembly was at the nominal height: * The SF FR was all all the way up and the buoyancy correction still has to be acconted for. * The temperature was very high; 24.7 degrees. * We began thinkng removing mass frlom the top of BF was necessary. * Thursday * We put kapton sheet between the thermistor and the aliminuim holder and covered the legs of the thermistor with PEEK tube. * The temperature decresed to about 23.6 degrees due to the quick reaction of Miyoki-san and others. * We were able to set the mirror to nominal height with the BF at the setpoint and the SF FR roughly in mid-range. * We also corrected a systematic error in settting the height: the laser line has a thickness of about 2 mm. * We moved the SF stepper motor shaft stop screws to the very top to allow for more range: * Now the total range is more than 5 mm and * The keystone new setpoint is -585 um. * The buoyancy effect is 585 um, so there plenty of FR range. In PR2 Hirata-san and Tomaru-san made height markings for aligning the mirror. === TypeC === * Strange behavior of MCo suspension was reported in the acceptance review for IMC. === Electronics === === Control === == Safety == == Discussion == * Found some questions when I was writing the [[https://github.com/gw-vis/vis-commissioning-tex|suspension commissioning document]] [Terrence] * IP tuning with asymmetric longitudinal and transverse resonance frequency. * Residual motion requirements inconsistency (0.2 urad (Sekiguchi) vs 0.01 urad (LIGO)). * Derived from beam spot misalignment. (Sekiguchi used 1 mm, some other KAGRA literature used 0.1 mm). * This made me question other requirements as well. * Schedule [Terrence] * I can't help but noticed that only 1 week is assigned for Type-B suspension commissioning, and 2 weeks for Type-A. This is far from sufficient from my experience. * Can I use one of the suspensions after commissioning? I really really really need this for my PhD. I can work at midnight or 24 hours a day, if I have to. * Potential error in MC optical lever calibration [Terrence] * Didn't take incidence angle into account. * I cannot change the calibration factor from the MEDM screen. * As discussed before, it would be calibrated to um/counts before diagonalization. == Travel Plans == The week from 4/26 * Takahashi: 4/26-28 * Sato: 4/26-5/1 * Hirata: 4/26-28 The week from 5/3 * Hirata: 5/7-9 == Next meeting == * 2021/4/30(FRI)