skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fast Simulation of Electromagnetic Showers in the ATLAS Calorimeter: Frozen Showers

Abstract

One of the most time consuming process simulating pp interactions in the ATLAS detector at LHC is the simulation of electromagnetic showers in the calorimeter. In order to speed up the event simulation several parametrisation methods are available in ATLAS. In this paper we present a short description of a frozen shower technique, together with some recent benchmarks and comparison with full simulation. An expected high rate of proton-proton collisions in ATLAS detector at LHC requires large samples of simulated events (Monte Carlo) to study various physics processes. A detailed simulation of particle reactions ('full simulation') in the ATLAS detector is based on GEANT4 and is very accurate. However, due to complexity of the detector, high particle multiplicity and GEANT4 itself, the average CPU time spend to simulate typical QCD event in pp collision is 20 or more minutes for modern computers. During detector simulation the largest time is spend in the calorimeters (up to 70%) most of which is required for electromagnetic particles in the electromagnetic (EM) part of the calorimeters. This is the motivation for fast simulation approaches which reduce the simulation time without affecting the accuracy. Several of fast simulation methods available within the ATLAS simulation frameworkmore » (standard Athena based simulation program) are discussed here with the focus on the novel frozen shower library (FS) technique. The results obtained with FS are presented here as well.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1030548
Report Number(s):
SLAC-PUB-14790
TRN: US201124%%304
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Conference
Journal Name:
J.Phys.Conf.Ser.160:012082,2009
Additional Journal Information:
Conference: Prepared for 13th International Conference on Calorimetry in High Energy Physics (CALOR08), Pavia, Italy, 26-30 May 2008
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; BENCHMARKS; CALORIMETERS; CALORIMETRY; COMPUTERS; HIGH ENERGY PHYSICS; MULTIPLICITY; PHYSICS; QUANTUM CHROMODYNAMICS; SIMULATION; VELOCITY; Instrumentation,INST

Citation Formats

Barberio, E, /Melbourne U., Boudreau, J, /Pittsburgh U., Butler, B, /SLAC, Cheung, S L, /Toronto U., Dell'Acqua, A, /CERN, Di Simone, A, /CERN, Ehrenfeld, E, /Hamburg U. /DESY, Gallas, M V, /CERN, Glazov, A, /DESY, Marshall, Z, /Caltech /Nevis Labs, Columbia U., Mueller, J, /Pittsburgh U., Placakyte, R, /DESY, Rimoldi, A, /Pavia U. /INFN, Pavia, Savard, P, /Toronto U., Tsulaia, V, /Pittsburgh U., Waugh, A, /Sydney U., Young, C C, and /SLAC. Fast Simulation of Electromagnetic Showers in the ATLAS Calorimeter: Frozen Showers. United States: N. p., 2011. Web.
Barberio, E, /Melbourne U., Boudreau, J, /Pittsburgh U., Butler, B, /SLAC, Cheung, S L, /Toronto U., Dell'Acqua, A, /CERN, Di Simone, A, /CERN, Ehrenfeld, E, /Hamburg U. /DESY, Gallas, M V, /CERN, Glazov, A, /DESY, Marshall, Z, /Caltech /Nevis Labs, Columbia U., Mueller, J, /Pittsburgh U., Placakyte, R, /DESY, Rimoldi, A, /Pavia U. /INFN, Pavia, Savard, P, /Toronto U., Tsulaia, V, /Pittsburgh U., Waugh, A, /Sydney U., Young, C C, & /SLAC. Fast Simulation of Electromagnetic Showers in the ATLAS Calorimeter: Frozen Showers. United States.
Barberio, E, /Melbourne U., Boudreau, J, /Pittsburgh U., Butler, B, /SLAC, Cheung, S L, /Toronto U., Dell'Acqua, A, /CERN, Di Simone, A, /CERN, Ehrenfeld, E, /Hamburg U. /DESY, Gallas, M V, /CERN, Glazov, A, /DESY, Marshall, Z, /Caltech /Nevis Labs, Columbia U., Mueller, J, /Pittsburgh U., Placakyte, R, /DESY, Rimoldi, A, /Pavia U. /INFN, Pavia, Savard, P, /Toronto U., Tsulaia, V, /Pittsburgh U., Waugh, A, /Sydney U., Young, C C, and /SLAC. Tue . "Fast Simulation of Electromagnetic Showers in the ATLAS Calorimeter: Frozen Showers". United States. https://www.osti.gov/servlets/purl/1030548.
@article{osti_1030548,
title = {Fast Simulation of Electromagnetic Showers in the ATLAS Calorimeter: Frozen Showers},
author = {Barberio, E and /Melbourne U. and Boudreau, J and /Pittsburgh U. and Butler, B and /SLAC and Cheung, S L and /Toronto U. and Dell'Acqua, A and /CERN and Di Simone, A and /CERN and Ehrenfeld, E and /Hamburg U. /DESY and Gallas, M V and /CERN and Glazov, A and /DESY and Marshall, Z and /Caltech /Nevis Labs, Columbia U. and Mueller, J and /Pittsburgh U. and Placakyte, R and /DESY and Rimoldi, A and /Pavia U. /INFN, Pavia and Savard, P and /Toronto U. and Tsulaia, V and /Pittsburgh U. and Waugh, A and /Sydney U. and Young, C C and /SLAC},
abstractNote = {One of the most time consuming process simulating pp interactions in the ATLAS detector at LHC is the simulation of electromagnetic showers in the calorimeter. In order to speed up the event simulation several parametrisation methods are available in ATLAS. In this paper we present a short description of a frozen shower technique, together with some recent benchmarks and comparison with full simulation. An expected high rate of proton-proton collisions in ATLAS detector at LHC requires large samples of simulated events (Monte Carlo) to study various physics processes. A detailed simulation of particle reactions ('full simulation') in the ATLAS detector is based on GEANT4 and is very accurate. However, due to complexity of the detector, high particle multiplicity and GEANT4 itself, the average CPU time spend to simulate typical QCD event in pp collision is 20 or more minutes for modern computers. During detector simulation the largest time is spend in the calorimeters (up to 70%) most of which is required for electromagnetic particles in the electromagnetic (EM) part of the calorimeters. This is the motivation for fast simulation approaches which reduce the simulation time without affecting the accuracy. Several of fast simulation methods available within the ATLAS simulation framework (standard Athena based simulation program) are discussed here with the focus on the novel frozen shower library (FS) technique. The results obtained with FS are presented here as well.},
doi = {},
url = {https://www.osti.gov/biblio/1030548}, journal = {J.Phys.Conf.Ser.160:012082,2009},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {11}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: