Simulation of angular resolution of a new electromagnetic sampling calorimeter

Junlee Kim; Eun Joo Kim; Young Jun Kim; Jung Keun Ahn; Gei Youb Lim

doi:10.1016/j.nima.2023.168261

Simulation of angular resolution of a new electromagnetic sampling calorimeter

Junlee Kim
, Eun Joo Kim^*
, Young Jun Kim
, Jung Keun Ahn
, Gei Youb Lim

^*Corresponding author for this work

Physics Education

Jeonbuk National University
Korea University
High Energy Accelerator Research Organization, Institute of Particle and Nuclear Physics

Research output: Contribution to journal › Journal article › peer-review

1 Scopus citations

Abstract

We report on the simulation results for the angular resolution of an electromagnetic (EM) sampling calorimeter with photons in the range of 100 MeV to 2 GeV. The simulation model of the EM calorimeter consists of alternating layers of a 1-mm-thick lead plate and a 5-mm-thick plastic scintillator plate. The scintillator plates are alternately segmented into horizontal and vertical strips. In this study, we obtain energy deposits in individual strips using Geant4 simulations and reconstruct the incident photon angles using the XGBoost with gradient-boosted decision trees. The performance of the angle reconstruction depends on the detector configuration and the accuracy of machine learning. The angular resolution is well described by the expression 0.24°⊕1.25°/E_γ, where E_γ is the incident photon energy in GeV, for 32 layers of 15 mm width strips. This energy dependence is consistent for different incident angles in the range of 10° to 40°.

Original language	English
Article number	168261
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1052
DOIs	https://doi.org/10.1016/j.nima.2023.168261
State	Published - 2023.07

Keywords

Electromagnetic calorimeter
Geant4
XGBoost

Quacquarelli Symonds(QS) Subject Topics

Physics & Astronomy

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10.1016/j.nima.2023.168261

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@article{bd5fe71a17b443cdb6d4b2c8daa38fdb,

title = "Simulation of angular resolution of a new electromagnetic sampling calorimeter",

abstract = "We report on the simulation results for the angular resolution of an electromagnetic (EM) sampling calorimeter with photons in the range of 100 MeV to 2 GeV. The simulation model of the EM calorimeter consists of alternating layers of a 1-mm-thick lead plate and a 5-mm-thick plastic scintillator plate. The scintillator plates are alternately segmented into horizontal and vertical strips. In this study, we obtain energy deposits in individual strips using Geant4 simulations and reconstruct the incident photon angles using the XGBoost with gradient-boosted decision trees. The performance of the angle reconstruction depends on the detector configuration and the accuracy of machine learning. The angular resolution is well described by the expression 0.24°⊕1.25°/Eγ, where Eγ is the incident photon energy in GeV, for 32 layers of 15 mm width strips. This energy dependence is consistent for different incident angles in the range of 10° to 40°.",

keywords = "Electromagnetic calorimeter, Geant4, XGBoost",

author = "Junlee Kim and Kim, \{Eun Joo\} and Kim, \{Young Jun\} and Ahn, \{Jung Keun\} and Lim, \{Gei Youb\}",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = jul,

doi = "10.1016/j.nima.2023.168261",

language = "English",

volume = "1052",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

}

TY - JOUR

T1 - Simulation of angular resolution of a new electromagnetic sampling calorimeter

AU - Kim, Junlee

AU - Kim, Eun Joo

AU - Kim, Young Jun

AU - Ahn, Jung Keun

AU - Lim, Gei Youb

PY - 2023/7

Y1 - 2023/7

N2 - We report on the simulation results for the angular resolution of an electromagnetic (EM) sampling calorimeter with photons in the range of 100 MeV to 2 GeV. The simulation model of the EM calorimeter consists of alternating layers of a 1-mm-thick lead plate and a 5-mm-thick plastic scintillator plate. The scintillator plates are alternately segmented into horizontal and vertical strips. In this study, we obtain energy deposits in individual strips using Geant4 simulations and reconstruct the incident photon angles using the XGBoost with gradient-boosted decision trees. The performance of the angle reconstruction depends on the detector configuration and the accuracy of machine learning. The angular resolution is well described by the expression 0.24°⊕1.25°/Eγ, where Eγ is the incident photon energy in GeV, for 32 layers of 15 mm width strips. This energy dependence is consistent for different incident angles in the range of 10° to 40°.

AB - We report on the simulation results for the angular resolution of an electromagnetic (EM) sampling calorimeter with photons in the range of 100 MeV to 2 GeV. The simulation model of the EM calorimeter consists of alternating layers of a 1-mm-thick lead plate and a 5-mm-thick plastic scintillator plate. The scintillator plates are alternately segmented into horizontal and vertical strips. In this study, we obtain energy deposits in individual strips using Geant4 simulations and reconstruct the incident photon angles using the XGBoost with gradient-boosted decision trees. The performance of the angle reconstruction depends on the detector configuration and the accuracy of machine learning. The angular resolution is well described by the expression 0.24°⊕1.25°/Eγ, where Eγ is the incident photon energy in GeV, for 32 layers of 15 mm width strips. This energy dependence is consistent for different incident angles in the range of 10° to 40°.

KW - Electromagnetic calorimeter

KW - Geant4

KW - XGBoost

UR - https://www.scopus.com/pages/publications/85152142282

U2 - 10.1016/j.nima.2023.168261

DO - 10.1016/j.nima.2023.168261

M3 - Journal article

AN - SCOPUS:85152142282

SN - 0168-9002

VL - 1052

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

M1 - 168261

ER -

Simulation of angular resolution of a new electromagnetic sampling calorimeter

Abstract

Keywords

Quacquarelli Symonds(QS) Subject Topics

Access to Document

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