Difference between revisions of "HRS Analysis"
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=== Carbon Contamination === | === Carbon Contamination === | ||
− | Goal is to estimate relative cross-sections, acceptance with radiative effects, and then cross-check by comparing rates between the carbon target and lead targets | + | Goal is to estimate relative cross-sections, acceptance with radiative effects, and then cross-check by comparing rates between the carbon target and lead targets |
+ | * Obtain counting mode data for lead and carbon targets to understand rates/thicknesses and provide a starting point | ||
+ | * Simulate the ideal carbon and lead targets and make sure we can predict accurately the rates and asymmetries that are measured | ||
+ | * Once those targets are ideally implemented in the simulation make a diamond+lead simulation for the front piece and the back piece (separately if needed, G4HRS generator will need code updates) to get radiation affects/contamination impacts on ideal lead | ||
+ | * Produce fractional rate and asymmetries per lead target | ||
=== Target Density Fluctuations === | === Target Density Fluctuations === | ||
Lead targets had density fluctuations and other changes over time that need to be understood in more time-resolved detail and studied carefully. | Lead targets had density fluctuations and other changes over time that need to be understood in more time-resolved detail and studied carefully. |
Revision as of 10:39, 3 July 2020
Portal for HRS, Counting Mode, Optics, data and simulation notes and meetings
Useful Notes
- Weekly Meetings - Monday 2:30 PM
- Hall A monte carlo portal
- G4HRS Simulation - Documentation, Github
- HAMC Simulation - Notes, tech-note, formulae, Github
- Carbon contamination study: Note, Kiad's thesis
HRS Analyses
- Bob's October 2019 analysis plan, Kent's October 2019 plan, Ryan's October 2019 Update (most useful starting point), Ryan's FOM calculation for CREX notes
- Notes from Tyler: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Analyses Projects
- Optics Database Tuning - Ryan, Siyu, etc.
- Acceptance Function + APV Extraction - Ryan, Chandan, Bob, etc.
- PREX I notes from Bob
- Average Q^2 from Analyzer and Simulation - Devi, Ryan, Dustin
- Inelastic backgrounds and contamination - Ryan, Devi, etc.
- Radiative corrections for APV extraction - ?
- Carbon contamination - Hanjie
- AT extraction, verification in Analyzer and Simulation - Ryan, Devi, etc.
- Rescattering, Pole Tip backgrounds, and more - Devi, Bob, etc.
Outstanding Issues
- Super-elastic tail in G4HRS simulation but not in the Analyzer data
- Related, questionable quad magnetic field implementation in G4HRS (see some of Tyler's notes above for reference)
- Raster / BPM corrections for Analyzer Database
- Consider two ways of tuning HRS database w/ & w/o septum co-tune
- Are radiative corrections handled properly in G4HRS
- Target implementation is simplistic in G4HRS (and needs to be update to do diamond foil + Pb simultaneously)
- Inelastic states may need additional attention in G4HRS
- Difficult to recreate the hard collimator cut seen in the data with G4HRS
Carbon Contamination
Goal is to estimate relative cross-sections, acceptance with radiative effects, and then cross-check by comparing rates between the carbon target and lead targets
- Obtain counting mode data for lead and carbon targets to understand rates/thicknesses and provide a starting point
- Simulate the ideal carbon and lead targets and make sure we can predict accurately the rates and asymmetries that are measured
- Once those targets are ideally implemented in the simulation make a diamond+lead simulation for the front piece and the back piece (separately if needed, G4HRS generator will need code updates) to get radiation affects/contamination impacts on ideal lead
- Produce fractional rate and asymmetries per lead target
Target Density Fluctuations
Lead targets had density fluctuations and other changes over time that need to be understood in more time-resolved detail and studied carefully.