There will be an analysis/diagnostics meeting Thursday 26th November, 14:00.

We will be in one of the usual meeting rooms in the Atlas building, using phone:

  • Optics review
  • Tracker resolution and efficiency - Tracker Group
  • Tracker-to-tracker alignment - Melissa/Chris Hunt/John Nugent
    • Tracker Survey
  • Tracker alignment to field - Chris Rogers/Sophie
  • Cut-based beam selection vs 2015/01 data - Tanaz/Scott Wilbur
  • Ckov momentum scan - Ao, Durga
  • Full PID vs 2015/01 data - Celeste
  • PID detector alignment - Francois
  • Detector Efficiencies - Jan/Francois
  • Paper: High precision measurement of emittance - Chris Hunt/Victoria
  • Date of Next Meeting
    • 7th January Optics review prep special?
    • 14/15 January Optics Review


Scott Wilbur
Tanaz Mohayai
John Nugent
Chris Hunt
Sophie Middleton
Adam Dobbs if he returns
Paul Kyberd
Durga Rajaram
Paul Soler
Melissa Uchida

Tracker resolution and efficiency
  • Scripts and tools to produce plots exist; waiting for fix in MC
  • Paul K is looking in MC
  • What level of efficiency?
    • Difference between duplets and triplets
    • Not just looking at "hits anywhere in the plane"
    • Some planes are less efficient
    • Concentrating on space point efficiency at the moment
    • In the end need to show efficiency is consistent at different levels and is flat across the aperture
    • Do we care about TOF efficiency?
      • Durga: the efficiency in TOF is 90 % in the middle and 70 % on the edge
      • Space point efficiency: number of slab hits that make a space point
      • Global efficiency: ROGERS to chase Francois
  • Resolution?
    • Compare TOF with tracker
    • ROGERS to upload field maps
Tracker-to-tracker alignment;
Chris H:
  • Merge branch of Chris Hunt tagged for merging into next release; should have no more issues with data reconstruction
  • Mysterious momentum flip comes from tying Kalman back into globals, did not get pushed
  • Chris Hunt would love to do this afternoon
  • Alignment workshop on Monday; update to be reported by email from Chris H, due to scheduling conflict
    John N:
  • Internal tracker alignment and tracker to tracker alignment from data and MC
  • Chris Heidt: reported a fix but no time
  • Melissa Uchida: comments about updated geometry using latest survey measurements
  • Proper survey measurements has been related back to the survey and put into MAUS
  • Needs to be written up as a MICE note
Cut-based beam selection
  • Paul Soler: use ratio of TOF to e peak?
  • Rogers: survey data is available as MICE notes
  • Durga: MAUS should get correct geometries
  • 3 additional peaks have DS off
  • May be that using D2 as a PID variable is not so interesting; better to just fit to the peak
TOF0 alignment
  • Barely anything in TKU; not enough data; need decay solenoid

residuals_tof0_tku.png (34.8 KB) Rogers, Chris, 17 December 2015 13:54

slides.pdf - Scott's plots on momentum dependence of TOF (36.5 KB) Wilbur, Scott, 17 December 2015 13:59