preliminary results on non-projective hcal simulations
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04/22/23
Guilherme Lima, DHCal Meeting 1
Preliminary Results on Non-Projective HCal Simulations
Dhiman Chakraborty, Guilherme Lima, Jeremy McCormick, Vishnu Zutshi
NICADD / Northern Illinois University
04/22/23 Guilherme Lima, DHCal Meeting 2
Status SummaryLast week overview, status and plans for short
and medium termToday – Non-projective Hcal geometry– Geometry initialization– Preliminary results–…
04/22/23 Guilherme Lima, DHCal Meeting 3
Why a non-projective HadCal?A projective geometry is– easy to analyze (cal towers)– easy to find cell neighbors, cones
But it also– needs many different cell sizes–may have cells too big at outer layers– cells may be too large at lower angles
04/22/23 Guilherme Lima, DHCal Meeting 4
Why a non-projective HCal?Fabricating a small number of cell sizes is simpler, cheaper and maybe even better…Small cell sizes are nice for a digital calorimeter, but too many small cells may become a nightmare:– Hot cells / dead cells– Space for readout– Cost per channel
Simulations are helpful to adjust cell dimensions in order to maximize performance/cost ratio.
04/22/23 Guilherme Lima, DHCal Meeting 5
First version of NP simulatorBased on (projective) LCDG4Fixed cell sizes (rectangular for
now)User provides cell dimensions, and
simulator makes slight adjusts (few %) for integral numbers of cells along z,
Only HCal for now, but plans for ECal
04/22/23 Guilherme Lima, DHCal Meeting 6
Preliminary testsUse single particles:– Muons, pions and electrons– Fixed directions in space– Different energies (2,5,10,20,30,50 GeV)
Absolute energy depositionComparison with projective geometry – Same energy deposition per layer– Number of hit cells reasonably scales with
inverse of cell area (pions)Complex physics events
04/22/23 Guilherme Lima, DHCal Meeting 7
Energy in ECal absorberEstimate approx 8.7 MeV for a MIP
Energy (MeV)
# entries
04/22/23 Guilherme Lima, DHCal Meeting 8
Estimate approx 0.2 MeV for a MIP
Energy (MeV)
# entries
Energy in Ecal sensors
04/22/23 Guilherme Lima, DHCal Meeting 9
Energy in HCal absorber
Estimated about 31 MeV for a MIP
10 GeV Muons
50 GeV pions
04/22/23 Guilherme Lima, DHCal Meeting 10
Energy in HCal sensitive layers
Estimated about2.4 MeV for a MIP
04/22/23 Guilherme Lima, DHCal Meeting 11
Number of hits in ECal
04/22/23 Guilherme Lima, DHCal Meeting 12
Number of hits in HCal
04/22/23 Guilherme Lima, DHCal Meeting 13
Comparison to LCDG4proj and GISMO
04/22/23 Guilherme Lima, DHCal Meeting 14
Hit distributions per layer
HCal
ECal
04/22/23 Guilherme Lima, DHCal Meeting 15
Last layers hit in each event
50 GeV pions
04/22/23 Guilherme Lima, DHCal Meeting 16
Total energy per layer(comparison to LCDG4proj and GISMO)Energy (MeV)
Layer
50 GeV pions
04/22/23 Guilherme Lima, DHCal Meeting 17
Total energy(based on GISMO sampling fractions)
04/22/23 Guilherme Lima, DHCal Meeting 18
Checking EM sampling fraction
Based on GISMO sampling fractions(a reevaluation is needed!)
04/22/23 Guilherme Lima, DHCal Meeting 19
Conclusions• JAS3 analysis classes available* for general use• Preliminary results look very encouraging• Projective vs. non-projective values for energy depositions per layer are in good agreement• Sampling fractions need to be reevaluated• Next steps include:
• replace SDJan03 for SDMar01• analyze complex physics events in NP geometry (Vishnu?)• extend NP geometry into EMCal• use hexagonal cells• whatever else is necessary to certify NP simulation…(?)