VIS Commissioning Task List

Urgent Tasks

  • Disable the built-in watchdog of all the coil drivers (Okutomi, Fabian, Shimode)
  • Cryo-payload damping
  • Actuator diagonalization, BP Comb, IM loops
  • ITMY (Yamada)
  • ETMX (Fujii)
  • ITMX (Okutomi, Ushiba)
  • Implement calm-down filters for Type-A (Okutomi, Ushiba)
  • ASC actuation tuning for Type-A
  • ETMY, ITMX (Okutomi, Ushiba)
  • ITMY (Yamada)
  • ETMX (Fujii)
  • LVDT sensor correction for IP and F0 (Fabian, Terrence)
  • L-P, L-Y decoupling for BS and SRM (Shoda)
  • Change the coil drivers for MN to HP (Yamada, Aso)
  • Adjust the gains of the damping loops (Yamada, Okutomi, Ushiba)
  • Recalibrate the optic align (Yamada)
  • Check if LVDT noise is limited by ADC or not (Shoda)
  • Install whitening filters if necessary (Okutomi, Fabian)
  • Implement LVDT sensor correction for the BF stage (Fujii, Lucia)
  • Type-Bp DC control set point has opposite polarity from the other suspension types: modify the real time model (Shoda)
 

Near term tasks

  • Speed up the state transition of Type-B guardian (Terrence)
  • Investigate the 238Hz peak in the GAS filters of ITMY (klog) (Lucia)
  • Implement the serial hierarchical control similar to Type-A (klog) to Type-B and Bp (Terrence, Shoda)
  • Estimate the length RMS of the Type-A suspensions when the lock acquisition is reasonably easy, from the mass feedback signal (Nakano, Enomoto)
  • This will be used as the target for Type-A damping on stormy days
  • Implement calm down and lock acquisition damping states for Type-B (Fabian)
  • Implement observation mode (low-noise) damping for Type-B
  • Damping feedback only to F0. Only DC control for SF and BF (Fabian)
  • Implement BP-Comb like filters for IM OSEM damping (Fabian)
  • Set the threshold of the software watchdogs to proper values (to be assigned)
  • Add proper watchdog blocks to Type-A real time models (Okutomi)
  • Guardian should automatically go to the calm down state when the mirror is kicked (Shoda, Terrence, Okutomi)
 

Longer term tasks

  • Improve the LVDT drivers to reduce the LVDT circuit noise
  • Ask the Virgo Pisa group for help (Aso)
  • Explorer the possibility of utilizing the common ground motion or global IP control (Lucia, Fabian, Takahashi, Aso)
  • Advanced techniques for reducing IP RMS (to b
  • Feed forward
  • Common mode rejection
  • Unified user interface (to be assigned)
  • Similar MEDM screen appearance
  • Consistent channel name convention
  • Consistent guardian state names, behavior