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Title: GQLink: an implementation of Quantized State Systems (QSS) methods in Geant4

Abstract

Simulations in high energy physics (HEP) often require the numerical solution of ordinary differential equations (ODE) to determine the trajectories of charged particles in a magnetic field when particles move throughout detector volumes. Each crossing of a volume interrupts the underlying numerical method that solves the equations of motion, triggering iterative algorithms to estimate the intersection point within a given accuracy. The computational cost of this procedure can grow significantly depending on the application at hand. Quantized State System (QSS) is a recent family of discrete-event driven numerical methods exhibiting attractive features for this type of problems, such as native dense output (sequences of polynomial segments updated only by accuracy-driven events) and lightweight detection and handling of volume crossings. In this work we present GQLink, a proof-of-concept integration of QSS with the Geant4 simulation toolkit which stands as an interface for co-simulation that orchestrates robustly and transparently the interaction between the QSS simulation engine and aspects such as geometry definition and physics processes controlled by Geant4. In conclusion, we validate the accuracy and study the performance of the method in simple geometries (subject to intense volume crossing activity) and then in a realistic HEP application using a full CMS detectormore » configuration.« less

Authors:
 [1];  [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [3];  [1]
  1. Univ. of Buenos Aires (Argentina); ICC-CONICET (Argentina)
  2. CIFASIS-CONICET (Argentina)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1525459
Report Number(s):
FERMILAB-CONF-17-698-CD
Journal ID: ISSN 1742-6588; 1700014
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 1085; Journal Issue: 5; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

Citation Formats

Santi, Lucio, Bergero, Federico, Jun, Soon Yung, Genser, Krzysztof, Elvira, Daniel, and Castro, Rodrigo. GQLink: an implementation of Quantized State Systems (QSS) methods in Geant4. United States: N. p., 2018. Web. doi:10.1088/1742-6596/1085/5/052015.
Santi, Lucio, Bergero, Federico, Jun, Soon Yung, Genser, Krzysztof, Elvira, Daniel, & Castro, Rodrigo. GQLink: an implementation of Quantized State Systems (QSS) methods in Geant4. United States. doi:10.1088/1742-6596/1085/5/052015.
Santi, Lucio, Bergero, Federico, Jun, Soon Yung, Genser, Krzysztof, Elvira, Daniel, and Castro, Rodrigo. Thu . "GQLink: an implementation of Quantized State Systems (QSS) methods in Geant4". United States. doi:10.1088/1742-6596/1085/5/052015. https://www.osti.gov/servlets/purl/1525459.
@article{osti_1525459,
title = {GQLink: an implementation of Quantized State Systems (QSS) methods in Geant4},
author = {Santi, Lucio and Bergero, Federico and Jun, Soon Yung and Genser, Krzysztof and Elvira, Daniel and Castro, Rodrigo},
abstractNote = {Simulations in high energy physics (HEP) often require the numerical solution of ordinary differential equations (ODE) to determine the trajectories of charged particles in a magnetic field when particles move throughout detector volumes. Each crossing of a volume interrupts the underlying numerical method that solves the equations of motion, triggering iterative algorithms to estimate the intersection point within a given accuracy. The computational cost of this procedure can grow significantly depending on the application at hand. Quantized State System (QSS) is a recent family of discrete-event driven numerical methods exhibiting attractive features for this type of problems, such as native dense output (sequences of polynomial segments updated only by accuracy-driven events) and lightweight detection and handling of volume crossings. In this work we present GQLink, a proof-of-concept integration of QSS with the Geant4 simulation toolkit which stands as an interface for co-simulation that orchestrates robustly and transparently the interaction between the QSS simulation engine and aspects such as geometry definition and physics processes controlled by Geant4. In conclusion, we validate the accuracy and study the performance of the method in simple geometries (subject to intense volume crossing activity) and then in a realistic HEP application using a full CMS detector configuration.},
doi = {10.1088/1742-6596/1085/5/052015},
journal = {Journal of Physics. Conference Series},
issn = {1742-6588},
number = 5,
volume = 1085,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: A charged particle trajectory in a magnetic field ($\vec{B}$) using the 4th-order Runge-Kutta method.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.