Outline of the Beam Test Analysis Memo
Simulation
Geant4 package and simulations checks
- G3-G4 comparisons
- G4-EGSE comparisons
- CU geometry handling: standalone G4 CUTower simulation
- Low energy EM physics and discovery of LPM effect - improvement in TKR hits
- Hadronic physics lists
- Realistics TKR signal digitization algorithm
Geometry cross-checks
- TKR material audit
- w thickness - corrected in BT and GR
- missing mass in the tray boundaries and in the bottom tray - not corrected
- CAL material audit - implemented
- Realistic TKR tray geometry (honeycomb core, glue dots, strips)
- Effect of TKR alignment
Data integrity checks
Beamline checks and scan on extra material
- beam spot tuning and effect on data-MC agreement
- pressure scan on cerenkov, studies with extra layers of material before the CU and between TKR and CAL
CAL calibration
- pedestal drift from rate effect
- pedestal variations and correction with temperature
- light yeld correction with temperature
- LAC thresholds measurement and update in the simulation
- Cross-talks: FLE-FHE, inter-layer and effects on small-big diode intercalibration
TKR response
- no effects seen for high rates
- GTRC/FIFO registers settings
- Optimised split readout
Results
- data-MC agreement matrix
- projections of current discrepancies on background rejection
Tools and lessons learned (for internal collaboration use)
This should be a list of useful things we have developed which could help in minimizing the effort for a continuing analysis and a list of things to improve or avoid
- BtSystemTest
- use of pipeline II - how much effort?
- bad documentation of merit and svac tuples
- confusing naming for tkr hits variables (took a long time to realize that hits variables in merit are actually clusters variables and real hits in the svac)