Electron/hadron separation with the TRD based on GaAs pixel detectors
- NázevTitle
- Electron/hadron separation with the TRD based on GaAs pixel detectorsElectron/hadron separation with the TRD based on GaAs pixel detectors
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- J. Alozy, N. Belyaev, B. Bergmann, P. Burian, E.H.M. Heijne, P. Smolyanskiy
- DOIDOI
- 10.1016/j.nima.2026.171597
- Časopis / citaceJournal / citation
- Nuclear Instruments and Methods in Physics Research, Section A, Accelerators, Spectrometers, Detectors and Associated Equipment. 2026, 1090 1-18. ISSN 1872-9576.
- RokYear
- 2026
- JazykLanguage
- eng
- WoSWoS
- 001769081700001
- ScopusScopus
- 2-s2.0-105038299920
- RIVRIV
- ProjektProject
- Identifikace částic v experimentech fysiky vysokych energií a ve vesmíru s pokročilými detekčními systémyParticle identification in high-energy physics experiments and space with advanced detection systems
AbstraktAbstract
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 mu 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 & sdot; 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.
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 mu 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 & sdot; 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.