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:

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