Transition Radiation Detector Upgrade for the GlueX-III Charmonium Program
Abstract
The GlueX-III experiment at Jefferson Lab, planned to run in 2027-2029, will enhance the laboratory's capability to explore charmonium production near threshold and related aspects of QCD in the non-perturbative regime. A central upgrade for GlueX-III is a large-scale triple-GEM Transition Radiation Detector (TRD) optimized for electron identification and pion suppression in the hadron-rich environment of fixed-target photoproduction. This document describes the motivation for and efforts related to such an upgrade, including the design, construction, and performance of a 720x528mm2 triple-GEM-TRD prototype that was tested in the existing GlueX-II experimental acceptance during the 2025 run. Results validate the prototype's integration, timing performance, and electron identification capability. Its projected impact in the GlueX-III setting is discussed, with background reduction in a J/ψ candidate sample demonstrated. The development and use of a modern TRD technology in a high-background environment at Jefferson Lab may inform detector design choices as a future upgrade path for the EIC.
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BibTeX
@misc{kasper2026transition,
title = {{Transition Radiation Detector Upgrade for the GlueX-III Charmonium Program}},
author = {Lauren Kasper and Alexander Austregesilo and Cody Dickover and Sean Dobbs and Sergey Furletov and Yulia Furletova and Ilya Larin and Lubomir Pentchev and Saheli Rakshit and Nizar Septian and Simon Taylor and Julia Velkovska},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.31585},
eprint = {2609.31585},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.31585},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Transition Radiation Detector Upgrade for the GlueX-III Charmonium Program
AU - Lauren Kasper
AU - Alexander Austregesilo
AU - Cody Dickover
AU - Sean Dobbs
AU - Sergey Furletov
AU - Yulia Furletova
AU - Ilya Larin
AU - Lubomir Pentchev
AU - Saheli Rakshit
AU - Nizar Septian
AU - Simon Taylor
AU - Julia Velkovska
PY - 2026
DA - 2026/09/30
PB - arXiv
DO - 10.48550/arxiv.2609.31585
UR - https://arxiv.org/abs/2609.31585
AB - The GlueX-III experiment at Jefferson Lab, planned to run in 2027-2029, will enhance the laboratory's capability to explore charmonium production near threshold and related aspects of QCD in the non-perturbative regime. A central upgrade for GlueX-III is a large-scale triple-GEM Transition Radiation Detector (TRD) optimized for electron identification and pion suppression in the hadron-rich environment of fixed-target photoproduction. This document describes the motivation for and efforts related to such an upgrade, including the design, construction, and performance of a 720x528mm^2 triple-GEM-TRD prototype that was tested in the existing GlueX-II experimental acceptance during the 2025 run. Results validate the prototype's integration, timing performance, and electron identification capability. Its projected impact in the GlueX-III setting is discussed, with background reduction in a J/ψ candidate sample demonstrated. The development and use of a modern TRD technology in a high-background environment at Jefferson Lab may inform detector design choices as a future upgrade path for the EIC.
ER -