J. Kissel, for the everyone

Since we're running out of Tuesdays before O1 / ER8 to do "invasive" activities that have been traditionally lumped into the term "maintenance," we'll be performing a several of these activities tomorrow morning (Thursday 7.23). The idea is that Tuesdays are typically swamped/confused by CDS Software maintenance, and much IFO hardware and electronics tuning needs CDS up-and-running. We intend to start these activities after the operator training period ends (at 09:00) and complete all activities by 12:00 PT, and recover the IFO with great vigor, ASAP, as though it were a Tuesday.

There are several activities in the list below which are still "maybes" because the associated electronics were not known to be ready at the time of this aLOG, but those task leaders in question were working hard on having the electronics ready today, and we'll reassess in the morning.

 (All times Local/Pacific)
09:00 ETMY HEPI Pump Accumulator repair 1 hour (H. Radkins)
          To fix problem found on Tuesday (see LHO aLOG 19796) 
      PSL PMC alignment adjustment 2 hours (J. Oberling, P. King, PSL OPS)
          To address that the reflected power has drifted above 10% over 
          the past few months 
      Cosmic Ray Detector Commissioning 1 hour (R. McCarthy, V. Roma, J. Palamos)   
          To finish cabling up and testing functionality of CRD installed 
          on Tuesday (see LHO aLOG 19804)
      BSC-ISI Front-end Model Restarts 1 hour (H. Radkins, J. Warner, J. Kissel)
          To install SUS payload watchdog fix (LHO aLOG 19842)

10:00 Add new EPICs channels to CAL-CS model 30 min (J. Kissel)
          To support storage of reference calibration filter values at 
          calibration line frequencies for tracking slow time dependence
          of interferometer response. (See T1500377)
      Investigate ETMX PCAL Reflection PD clipping 2 hours (S. Karki, D. Tuyenbayev, R. Savage, T. Sadecki)
          To solve problems seen in variability of ETMX PCAL calibration. (see LHO aLOG 19025)
      Add GPS serial port to Corner-Station Beckhoff PLC 30 min (D. Sigg)
          To add more diagnostic signals for the recently-installed 
          external GPS clock reference (see LHO aLOG 19782)

11:00 MAYBE PSL FSS Electronics Upgrade 1 hour (J. Oberling, P. King, PSL OPS)
          To increase the frequency of the high-pass on the fast/phase EOM actuator, 
          such that an IMC lock-loss is less inclined to saturate the fast/phase EOM
          actuator and *keep* the FSS railed in oscillation, i.e. to solve problems 
          seen after FSS tune-up and catastrophe on July 14 (LHO aLOG 19623
      MAYBE Cable up and commission EX LVLN ESD Driver (R. McCarthy, E. Hall, J. Kissel)
          To finish cabling up and testing functionality of driver that
          was installed on Tuesday LHO aLOG 19803