The various Phase-2 geometry descriptions are documented in Configuration/Geometry/README.md.

Available RelVal workflows for all geometries can be found by doing runTheMatrix.py -w upgrade -n. (The possible -w arguments are listed in Configuration/PyReleaseValidation/python/).

Related to this, the various pileup scenarios are detailed in Configuration/StandardSequences/python/Mixing.py. The ‘auto’ conditions are detailed in Configuration/AlCa/python/autoCond.py. The ‘era’ parameters are detailed in Configuration/StandardSequences/python/Eras.py.

For Phase-2 L1T Upgrade TDR studies, I used geometry Extended2023D41, era Phase2C8_timing_layer_bar, beamspot HLLHC14TeV, conditions auto:phase2_realistic, pileup AVE_200_BX_25ns.