= Minute of KAGRA commissioning meeting = ---- * Date: 2019/5/28 15:00~16:00 * Attendance: Miyakawa, Tomura, Fabian, Oshino, Washima, Yokozawa, Nakano, Terrence, Dahan, Kozakai, Pan, Sawada, Nakano, Yamada * Zoom: Miyoki, Takahashi, Eleonora, Inoue, Fujii ----- === Summary of last week === * Cryo cooler for Yarm stopped and finesse was recovered. * Xarm 1451(1) with ITMX 73 K ETMX 120 K * Yarm 1312(5) with ITMY 65 K ETMY 75 K * Cryo status and plan * ETMs has no dew on 80K viewport but ITMs has still dew on their viewport. === Discussion === * Results of finesse measurement looks a bit too high. Needs estimation of loss inside cavity for Yarm. * We should keep finesse measurement for going back the cooling down ITMY. * For DRMI preparations, optics, circuit, cabling, control models are almost ready. * Type A control test should be done during DRMI. * Type B and A needs some IFO as sensor. * Write manual if you experienced something. * CAL: MICH and DRMI calibration model is ready. * Remote work should be managed by calling to control room or sending email to gokagra. * Smooth transition for when watch dog is engaged has been implemented to Type B. It should be implemented to Type A. * When? -> Maybe tomorrow morning during maintenance time or the next week during DRMI. * Engineering run: * IMC is the first candidate which will be used for run. This is because Guardian is ready for only IMC, not for Michelson or X arm. ---- == Others == * Next meeting: 5/28.