There will be an analysis/diagnostics meeting Thursday 19th November, 14:00.

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

  • Tracker resolution and efficiency - Melissa/Chris Hunt/John Nugent
  • 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


Celeste Pidcott
Francois Drielsma
Chris Rogers
Tanaz Mohayai
Ryan Bayes
John Nugent
Scott Wilbur

Millipede offsets etc fixed
- please show residuals plots
- confirming internal alignment
- getting ready for tracker to tracker alignment for next time

Francois, tracker sign flip (Drielsma)
- xflip - reading out fibres the wrong way for all the planes
- v and w were swapped
- wrong ordering of the readout is at reconstruction level
- plane swap comes from the geometry
- still need to verify fix in MC

Tracker alignment to field (VB)
- VB promises for something today or tomorrow(ish)

Cut-based beam selection (Scott)
- Scott has some working code that will do a framework for cut-based beam selection
- Do we want to run it inside the MAUS loop or just get it running?
- Figure out mapping from D2 current to timing windows
- Notes that D2 currents are not necessarily related in the expected way to TOF012; will turn into powerpoint for next time

Cut-based beam selection (Tanaz)
  • Noticed that discrepancy between TOF peaks between summer and October runs
Likelihood PID (Celeste)
  • Run PID on 2015 user cycle
  • Things look like they are working well
  • Nothing quantitative yet
  • Things look reasonable
  • Only been done for KL and TOF; EMR not MCing and Ckov not in framework yet
  • Not yet looking at consistency between U/S and D/S as there are not yet enough detectors in place
Detector alignment
  • Nothing more
  • Could improve by using different tracker stations
  • Need to correct for tracker pitch
  • Looking at fitting distribution centre rather than calculating naive mean/RMS

Updated by Rogers, Chris over 8 years ago ยท 6 revisions