TMS Meeting Minutes, March 3, 2022

Attendees: Andrew, Breann, Christian, Heejoo, John, Olga, Trenton (Zoom Meeting)

April GMTO + LBTO Meetup:
  • Presentations, open forum, open discussion, and firming up the future of the TMS at LBTO
Summary of Recent Work:
  • Shutter Testing
    • Shutter open, data acquisition, shutter close
    • There appear to be problems within the range of about 100 shots
    • Andrew understnads this to be a faulty system, which is the responsibility of Etalon to fix (either here in AZ or in Germany)
    • B/c of the failure of the shutter, Heejoo and Andrew planning to manage the laser on/off procedures
    • Yang and Heejoo are trying to figure out how to turn the lasers on using TCP/IP
  • Three days of passive TMS collection (w/ one shot active mode at start of LBC)
    • March 1st, both sides passive mode (20220301)
      • Very interesting parabolic curve around 11:50 for both DIMM seeing, LBCb, and LBCr
      • Turns out the DIMM is not totally random, there is a correlation
      • Some interesting inversion at the beginning of the night
      • Heejoo plans to look at TMS motion in the two interesting areas
    • March 2nd, ran active mode for 2-3 shots before starting collimation, induced large jump and put the mirror on the limit
      • The problem, according to Andrew, is that we were losing a different channel configuration for than that of the reference
      • When the channel configuration changes, particularly if there is a large amount of uncorrelated error from the rocking magnetic mounts, the reference no longer gives an appropriate baseline
      • Andrew suggests that we could have a library of references including specific configurations which can be applied to a given channel configuration for a given night
      • Andrew plans to prepare a paper describing the behavior of the system during channel dropping in the presence of uncorrelated errors
    • Last night, able to see FPIA convergence within two iterations while running TMS in active mode
      • Andrew suggests that we should start data mining on the time to converge on LBC without TMS (in different conditions, temperatures, etc.)
      • Now, we have data with TMS to compare how quickly we can converge
      • Andrew suggests correlating this time to converge data with mirror therms, structure therms, wind temp, etc.
      • Proposal for an undergrad or masters student to work on this data analysis
      • Expect to see improvements in coma and focus as well as tilts from TMS when compared to FPIA
    • Heejoo still working on processing all of the data, and planning to plot out pose during large jumps to check for TMS sensing
    • Andrew would like to see if there are channels routinely dropping out throughout the night
    • Note: the term "channel dropping" refers to both physical channels drops and std. dev. filter drops
    • Andrew is specifially interested in LOST channels, not just dropped channels
    • LOST CHANNEL: physically impossible to obtain ma
TMS Utilization by Observers:
  • Andrew is very interesting in having more observers who want to use TMS for their on-sky science observations (much, much faster to converge with TMS)
  • This is particularly useful for observational campaigns with lots of elevation changes
  • Though this is not the priority (AO is) in the near future, LBC may be able to use TMS soon
TMS Chance Tonight:
  • LBC chance at 1 AM MST tonight
  • Heejoo planning to get up to start, and will hand off to Andrew when he needs to sleep

-- TrentonBrendel - 03 Mar 2022
Topic revision: r1 - 03 Mar 2022, TrentonBrendel
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