2016-03-21 Physics and Processing Requirements for IPAC » History » Revision 2

Revision 1 (Rogers, Chris, 21 March 2017 13:55) → Revision 2/6 (Rogers, Chris, 21 March 2017 13:56)

h1. 2016-03-21 Physics and Processing Requirements for IPAC 

 Thinking about the "measurement of emittance evolution" paper 

 | *Measurement Bias*     | *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 | 
 


 | *Model Bias*      | *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?