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DOE OSTI · 3702480

Electron/hadron separation with the TRD based on GaAs pixel detectors

Alozy, J. [European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0009000869942967)·Belyaev, N. [Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)] (ORCID:0000000211317121)·Bergmann, Benedikt L. [Czech Technical University in Prague (Czech Republic)] (ORCID:0000000280765614)·Burian, P. [Czech Technical University in Prague (Czech Republic)] (ORCID:0000000169077901)·Campbell, M. [European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0000000333592922)·Cherry, M. [Louisiana State University, Baton Rouge, LA (United States)] (ORCID:000000032808312X)·Doronin, Semen [National Research Nuclear University MEPhI, Moscow (Russia)] (ORCID:0009000668475194)·Fusco, P. [Università e del Politecnico di Bari (Italy); Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000293832425)·Gargano, F. [Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000250556395)·Llopart, X. [European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0000000166322457)·Loparco, F. [Università e del Politecnico di Bari (Italy); Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000211735673)·Mazziotta, M. N. [Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000193254672)·Heijne, E. H.M. [Czech Technical University in Prague (Czech Republic)] (ORCID:0000000212888540)·Ponomarenko, D. [Indiana University, Bloomington IN (United States)] (ORCID:0000000342131511)·Popov, Vladimir [National Research Nuclear University MEPhI, Moscow (Russia)] (ORCID:0009000644271832)·Rembser, C. [European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0000000161392210)·Romaniouk, Anatoli [Universität Innsbruck (Austria); Istinye University, Istanbul (Turkiye)] (ORCID:0000000192411189)·Smirnov, S. [Millennium Institute for Subatomic physics at high energy frontier (SAPHIR), Santiago (Chile)] (ORCID:000000026778073X)·Smirnov, Yu. [University of Johannesburg (South Africa)] (ORCID:0000000228910781)·Spinelli, P. [Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000166888864)·Smolyanskiy, P. [Czech Technical University in Prague (Czech Republic)] (ORCID:0000000211221218)·Teterin, Peter [National Research Nuclear University MEPhI, Moscow (Russia)] (ORCID:0000000235402136)·Tikhomirov, Vladimir O. [İstinye Üniversitesi, Istanbul (Turkey)] (ORCID:0000000296340581)·Vorobev, K. [Duke University, Durham NC (United States)] (ORCID:0000000271108516)·Zhukov, K. [Indiana University, Bloomington IN (United States)] (ORCID:0000000324689634)·Zhutikov, Ivan N. [Joint Institute for Nuclear Research, Dubna (Russia)] (ORCID:0000000313196148)
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Abstract

Transition Radiation Detectors (TRDs) are widely used for particle identification in both high-energy physics and astroparticle physics. They are typically equipped with gaseous detectors. The main limitation of these types of detectors is that TR photons and ionization losses cannot be decoupled, which significantly reduces the particle separation power. Recent advancements in the development of pixel detectors based on GaAs sensors offer a unique opportunity to effectively detect TR photons and separate them from ionization losses. Such detectors represent novel devices that combine precise tracking capabilities with particle identification (PID) properties. The present work is dedicated to an experimental study of particle identification properties of the TRD prototype based on 500 μ m-thick GaAs sensor bonded to a Timepix3 chip. Studies were performed at the CERN SPS and it was shown that at a particle momentum of 20 GeV/c, the probability of misidentifying a hadron as an electron is below 10 −2 for an electron detection efficiency of 98%–99%, and it is 1 . 6⋅10 −4 for electron detection efficiency of 90%. This performance surpasses the electron/hadron rejection power of all known TRDs by an order of magnitude for the same detector length.

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GaAs detectorsParticle identificationTimepix chipTransition radiation detectors

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BibTeXRIS

Alozy, J. [European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0009000869942967), Belyaev, N. [Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)] (ORCID:0000000211317121), Bergmann, Benedikt L. [Czech Technical University in Prague (Czech Republic)] (ORCID:0000000280765614), Burian, P. [Czech Technical University in Prague (Czech Republic)] (ORCID:0000000169077901), Campbell, M. [European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0000000333592922), Cherry, M. [Louisiana State University, Baton Rouge, LA (United States)] (ORCID:000000032808312X), Doronin, Semen [National Research Nuclear University MEPhI, Moscow (Russia)] (ORCID:0009000668475194), Fusco, P. [Università e del Politecnico di Bari (Italy); Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000293832425), Gargano, F. [Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000250556395), Llopart, X. [European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0000000166322457), Loparco, F. [Università e del Politecnico di Bari (Italy); Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000211735673), Mazziotta, M. N. [Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000193254672), Heijne, E. H.M. [Czech Technical University in Prague (Czech Republic)] (ORCID:0000000212888540), Ponomarenko, D. [Indiana University, Bloomington IN (United States)] (ORCID:0000000342131511), Popov, Vladimir [National Research Nuclear University MEPhI, Moscow (Russia)] (ORCID:0009000644271832), Rembser, C. [European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0000000161392210), Romaniouk, Anatoli [Universität Innsbruck (Austria); Istinye University, Istanbul (Turkiye)] (ORCID:0000000192411189), Smirnov, S. [Millennium Institute for Subatomic physics at high energy frontier (SAPHIR), Santiago (Chile)] (ORCID:000000026778073X), Smirnov, Yu. [University of Johannesburg (South Africa)] (ORCID:0000000228910781), Spinelli, P. [Istituto Nazionale di Fisica Nucleare, Bari (Italy)] (ORCID:0000000166888864), Smolyanskiy, P. [Czech Technical University in Prague (Czech Republic)] (ORCID:0000000211221218), Teterin, Peter [National Research Nuclear University MEPhI, Moscow (Russia)] (ORCID:0000000235402136), Tikhomirov, Vladimir O. [İstinye Üniversitesi, Istanbul (Turkey)] (ORCID:0000000296340581), Vorobev, K. [Duke University, Durham NC (United States)] (ORCID:0000000271108516), Zhukov, K. [Indiana University, Bloomington IN (United States)] (ORCID:0000000324689634), Zhutikov, Ivan N. [Joint Institute for Nuclear Research, Dubna (Russia)] (ORCID:0000000313196148). 2026-10-01. Electron/hadron separation with the TRD based on GaAs pixel detectors. https://doi.org/10.1016/j.nima.2026.171597

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