= Agenda/Minutes of the VIS Meeting on 2019/2/15 = 2019/2/15 13:30 - [[https://zoom.us/j/203743987|Zoom Meeting]] Participants: == Progress report == === Schedule Chart === Site work schedule: [[https://www.dropbox.com/s/f3lj5uzari3s258/Weekly%20schedule%20190219-VIS.xlsx?dl=0|XLSX]] Type-A : ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7320|PDF/MPP]]) Type-B: ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|PDF/MPP]]) Type-C: ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9013|XLSX]]) === Type-A (Takahashi) === ==== Past week report ==== [Y-end] * Checked the height of filters by the release sensor. The filters were not touching the sensors. * The F3 keystone was touching the stopper. Adjusted the weight on the BF. * The motion of BF keystone was very damped. Adjusted the position of secondary coil. * Adjusted the gain for F0 LVDT in the driver. Calibrated the F0 LVDT. * Adjusted the phase/gain for IP LVDT in the driver. Calibrated the IP LVDTs. * Set the height of F0 keystone to -9mm so that the height of BF can be at the nominal posision. * Released the IP. Each (H1, H2, H3) transfer function and spectrum looked natural. * Diagonalized transfer functions and spectra showed that the mode L and T are not degenerated (0.07Hz and 0.13Hz). * Checked inside of the corrugate tube by the long fiber scope. Any problems were not found. ==== Plan for coming weeks ==== * Adjustment of the TF, the BF damper, and the IP in X-end (Feb 26-28). === Type B (Mark) === ==== Report for week of 2/12 (February 12th) ==== * On Saturday we moved the vertical IM OSEMs in order to compensate for a large pitch in the IM introduced when the IR laser as aligned. * I took transfer functions over the weekend and the system looks healthy. * Although moving the OSEMs was done successfully, I accidentally pulled the cables and moved the flying saucer cable clamp set. I rotated it back judging the position by visual inspection, but an IM yaw drift appeared since then. It's moving with a speed of 0.2 urad/min. * On Tuesday we moved the Im back to zero but the drift continued. At the time of writing these lines it is at -833 urad, with H2 and H3 at 93 um and 47 um and still drifting. * On Saturday we connected the SRM geophones in-air cables and confirmed we had a signal. * However, on Wednesday morning the geophones are not giving any signal. We cheked the master model channel and realized the problem was not the slave model. We suspect a hardware fault. * I checked the in-air cables were connected. * We released the SRM optical bench and wiped the places where sticky tape was used to fix support blocks. * We wiped the SR2 optical bench and security structure. SR3 and SRM had been wiped by Hirose-san, Hirata-san and Fujii-kun. * Terrence started the previously prepared new model tower models for SRM and BS with the new ALIGN filters which is a copy of the TEST filter. The WD threshold for LVDTs and geophones are now separated. * Terrence worked on splitting the real-time models for the SR2 and SR3. The models worked with the new features now, with DAQ reset in some cases and with help of Miyakawa-san for configuring some DGS related documents (rtcsystab, master, safe.snap, etc). * Before starting the new models for SR2, Terrence completely shut off SR2 and swapped the power spool with the power strip that was previously prepared. * Terrence edited the DGS OVERALL screen to show the new SR2 and SR3 models. The TYPE B OVERALL MEDM screen was also modified so taking separate snapshots for the ALIGN and OPTIC ALIGN blocks is available. The corresponding burt request files were also created. * The corresponding Marco files were also updated to account for the model split and the new DCUIDs. Some mistakes in the Marco files were fixed. * The Guardian systems for all TYPE B suspensions were all shut off and the suspensions were put in the safe mode manually. * All Type B Guardian modules are pointing to the generic type B Guardian model (TYPEB.py). It was partially modified for the commissioning next week and Terrence will keep working on it in the afternoon. * Today the pumping down of the central area will begin around noon. We will monitor the four inverted pendulums ==== Plan for coming weeks ==== === Type-Bp (Shoda) === ==== Past week report ==== ==== Plan for coming weeks ==== === OMMT & OSTM (Ohishi) === ==== Past week report ==== ==== Plan for coming weeks ==== === VIS electronics (Tanaka) === ==== Past week report ==== ==== Plan for coming weeks ==== === Other site works === * Crane inspection: Feb 22nd 11:30 - 12:30 === Safety === * Incidents: * Foreseen risks * Type-A: * Type-B: == Discussion == == Travel Plans == * Travel (Week of 2/18): * Takahashi: * Okutomi: 18-22 * Sato: * Lucia: * Fabian: * Mark: 19-22 * Hirata: * Enzo: 19-22 * Shoda: * Ohishi: * Fujii: 19-22 * Tanioka: * Tanaka: * Terrence:18-22 * Travel (Week of 2/25): * Takahashi: 26-28 * Okutomi: * Sato: * Lucia: * Fabian: * Mark: 25-1 * Hirata: * Enzo: 25-1 * Shoda: * Ohishi: * Fujii: 25-1 * Tanioka: * Terrence: 25-1 == Next meeting == On 2019/2/22(Fri)