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2016-03-21 Physics and Processing Requirements for IPAC

Thinking about the "measurement of emittance evolution" paper

Measurement Uncertainty Mitigation/Estimation Strategy
Detector Resolution MC of "best guess" lattice
Track extrapolation
Efficiency MC of "best guess" lattice
Track extrapolation
Tracker field magnitude Hall probes give magnitude of uncertainty
Dead reckoning with COMSOL gives magnitude of uncertainty
MC with wrong current field gives magnitude of measurement error
Detector and SS alignment Track extrapolation/residuals gives magnitude of uncertainty
Survey probably doesn't help for SS and tracker
MC with misalignment gives magnitude of measurement error
Selection Biases Move selections around; examine change in measurement
Model Uncertainty Mitigation/Estimation Strategy
Magnet Alignments Track extrapolation/residuals gives magnitude of uncertainty
Survey may help for FC
MC with wrong current field/misalignments gives magnitude of MC uncertainty
Material Budget LiH MICE note tells us material budget and uncertainty
Thumb in air tells us He and window budget and uncertainty
MC with wrong material budget gives magnitude of MC uncertainty

Require:

  • "Best guess" lattice and MC thereof
  • Final version of MAUS Tracker recon/etc
  • For each parameter, we might need, say, 4 MC jobs (small and large negative and positive offsets). Parameters are:
    • Current of each of 10 coils
    • Alignment of each of 3 modules - assume coil-by-coil alignment is okay; 3 position offsets and 2 tilts
    • Alignment of each of TKU and TKD - 3 position offsets and 2 tilts
    • LiH thickness
    • 2 Window thicknesses
  • MC should be supported with appropriate back-of-envelope calculation. Fall back to back-of-the-envelope where possible...

Would like 100k muons inside analysis cuts for each MC job.

Other things I ignore:
  • Apertures/uncertainty
  • Anything else?