== Minute of PEM meeting == * Date: 2019/11/12 17:00-18:00(JST) * Attend:Yokozawa, TNTanaka, Mori, TTanaka, Ohkawa, Fujikawa, Kozakai, Washimi, Yamada, Kaihotsu === Agenda ===   * General issue * Meeting time * 17:00-18:00 -> 16:00-18:00 * Increase the discussion item * Conflict with CRY meeting(?) * Approved to changed the meeting time * Interferometer status * We are fixing the ALS(Arm Length Stabilization system) problem. * Mostly fixed * Long silent run at 2nd Nobember ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11312|klog11312]]) * How about status of the OMC installation? Start cable connecting and jigs setting * See the detail in [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/DET/RUN/MORNINGRUN2019|url]] * Silent run -> Some excitation(including calibration line) -> PEM injection -> Hardware injection * PTEP paper * [kagra 03133] * KAGRA Overview papers * Overview of KAGRA : (3) Detchar, calibration, physical environment, data quality * Next F2F meeting * RESCEU * 4th and 5th Dec., 2019 * 1 slot Washimi-san will have a talk * If you plan to write master/doctor thesis, please let me know * TTanaka * How about undergraduate student(TNTanaka)? * Chrome Book project (Portable PEM researcher) * http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Portable * We prepared two PEM Chromebook * Start writing paper (PTEP?) * ISS out-of-loop noise budget * PEM injection * Shaker injection1 (TTanaka, Yokozawa) * acoustic injection (TTanaka, Yokozawa) * magnetic field injection (Niigata Tanaka, Fujikawa, Yokozawa) * Weekly PEM measurement * Friday (+every morning) is weekly PEM measurement * Understanding the effect of the instruments, search the origin of noise, and so on * Tentative : 18V DC noise(24Hz), Cryochamber vibration, Air compressors, FFU, Cooler, Noise search * Oplev noise budget is important, but we need to consider how many oplev control will be remained * Database for the KAGRA characteristic lines * [[https://www.icrr.u-tokyo.ac.jp/~yokozawa/KAGRA_line_database/index.html|url]] * Fixed bugs * Visitors from LV * Anamaria from Livingston : 18 - 29 Nov. * Federico, Irene, Camilla (input optics) + Francesca from Virgo : 11/26-12/7 (2 weeks@KAGRA, 1 weeks@NAOJ) * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Meeting/191126/Agenda|LVK PEM meeting (11/26)]] * Fujikawa, TNTanaka 11/24-12/3 * Each progress * Yokozawa * Current serious noises * MICH control noise * ACC ground loop problem * New accelerometers for noise search * Lock state vs EXC magnetometer * Daily summary page * Washimi * IXC Air compressor (+TNTanaka) [[attachment:washimi_CRYmeeting_20191111.pdf]] [[attachment:TNT.pdf]] * Characteristic environmental noise was detected from air compressor * Accelerometers, microphone, (magnetometer in 1 hour)、oplev * Waiting the lock of the FPMI * KamioKaminari update [[https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/KamioKaminari/]] * The plot can be generated by Kashiwa server * Currently, there are thunder in the Japanese sea * PEM map update [[https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/PEMmap/]] * Pick up from the Yuzu summary page, they can see the one day plot from outside (previous version was only Kamioka site due to summary page) * Slow monitor page [[https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/SEM/]] * Trend of the environment, such as temperature is important issue * Now he is making the temperature trend monitor web page * Monthly dependence, weekly dependence * We want to discuss with Miyoki-san * vacuum monitor trend * weather station monitor by Yuzu summary page * Kozakai * Trigger analysis with silent run * The detail was reported in the DetChar meeting * Kozapy was updated, please pull from github * Optimize the checking channels * If silent run was held before 6:00am, the triggered data was shown in the 12:00 * TTanaka(ICRR) * Acoustic injection with FPMI (+ Washimi, Yamada, TNTanaka) * We held the acoustic injection with FPMI at 2nd Nov. * IXC, IYC, PSL room * EXC to microphone * Data analysis is ongoing * How to inject the low frequency? * Mori * Vacuum pump vibration * Uploaded to the JGWDoc * Fujikawa, Mori * No report * fujimopy * Line amplitude web page * Fujikawa * Lock loss study [[attachment:PEMmtg_191112lock-2.pdf]] * IO lock loss candidate by circuit histogram * Check the lock loss reason for only the PEM channels * See the spectrum for lock loss time * If multiple channels excess the threshold, both channels were added. 66 lock loss -> >>66 candidate * Set threshold by gaussian fitting and 5 sigma * Need additional investigation for the acc threshold * Now there is effect in the no data time, zero padding or ignore * IO guardian was changed this week (removed the reference cavity) * TTanaka(Niigata) * Preparation of the coil * IXC compressor study * Magnetic field investigation from the air compressor * See the spectrogram by Pastavi * Yamamoto, Yuzu, Andrew * Pastavi * etc