2016-06-10-EB-physics-report¶

Descope options¶

• See elsewhere

Emittance paper¶

• First meeting with refereees
  • Need more detail on reconstruction - "proof" that the detectors work
  • Need to untangle assumption of cylindrical symmetry implicit in Penn definitions; e.g. eigenemittances etc?
• Rogers/Jan Greis looking at tracker recon and comparison with TOF
  • Picked up problems with detector alignment in straight tracks data for MC; suspect ongoing bugs still in tracker recon software
  • Now have Kalman fit working for non-uniform fields; going through algorithm optimisation/tuning; compare with SciFi and MC truth
  • Can start looking at solenoid alignment, but need to work through any remaining issues in the tracker alignment/software
• Durga is working through TOF features
  • Systematic error on TOF based on rate effects
  • Systematic error on TOF due to off axis path length of electrons used in TOF calibration
• Scott is working through PID issues
  • Quite strong confirmation that the "muon shoulder" arises due to the diffuser support
  • Found that we do not have sufficient data to validate the PID routines by comparison between TOF/tracker and EMR
    • EMR pion rejection is not good enough
    • Have to use MC for validation instead
• MC sample shows improved agreement with data
  • Main issue -> few MeV/c pz offset between MC and data

Scattering paper¶

• Ryan has complete end-to-end analysis
• Get good agreement with Cobb-Carlisle model and data
• Working through the systematics
• Worried about systematic influence of MC on the analysis
• Also considering Fourier-transform based deconvolution
• Also considering "empty data + scattering model"

Cooling Demo paper¶

• JB has note in good order
• Held up due to illness
• Referee meeting planned for Monday 20th June
• I have final draft, in the end without recon, to pass to referees

Other things¶

• Magnet alignment via transfer matrices - Sophie has numbers on the FC alignment; but analysis of straight tracks data is not showing tracker alignment => issues in tracker recon
• Magnet alignment via minimise residuals - depends on global track fitting routines, which Rogers is working on
• Beamline optimisation - Paolo is working on momentum selection, before going through details of quad optimisation; advice is to focus on "no diffuser" settings for 3 T in SSU

July run plan¶

• I have a partial run plan note
• Working through "measurement coordinators" and some of the details