Particle identification using the angular distribution of transition radiation

doi:10.1016/0029-554X(81)90080-X

Nuclear Instruments and Methods

Volume 180, Issues 2–3, 1 April 1981, Pages 409-412

https://doi.org/10.1016/0029-554X(81)90080-X Get rights and content

Abstract

An electronic detector has been built which measures the angle of emission of transition radiation photons, as well as the energy deposit. A significant gain in the efficiency of particle identification is obtained for $γ⋍10^{3}$ .

References (5)

J. Cobb
Nucl. Instr. and Meth.
(1977)
J. Fischer
Nucl. Instr. and Meth.
(1975)

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Cited by (14)

Transition radiation detectors for hadron separation in the forward direction of LHC experiments
2023, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Studies in many areas of particle and astroparticle physics require a good knowledge of hadron spectra produced at small angles to the primary particle direction, e.g. in the TeV energy range at the LHC. The present work is dedicated to development of a particle identification technique based on the transition radiation produced by highly relativistic particles. Dedicated experimental studies were carried out and simulation models were developed to reproduce experimental data obtained with different prototypes. On the basis of these studies, the possibility of making detectors able to provide hadron composition measurement with high accuracy and identify particles with high efficiency in the forward experiments at the LHC was demonstrated. Two concepts of large scale TRDs are proposed: the straw TRD and the GaAs/straw TRD. They allow the reconstruction of hadron spectra with accuracy about or below 1% and to identify particles with high efficiency in individual events. As an example, suppression of the combinatorial background was demonstrated for the D $^{0} \to$ K $^{-} π^{+}$ and ${\bar{D}}^{0} \to$ K $^{+} π^{-}$ decays.
Studies of the spectral and angular distributions of transition radiation using a silicon pixel sensor on a Timepix3 chip
2020, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
X-ray transition radiation detectors (TRDs) are used for particle identification in both high energy physics and astroparticle physics. In most of the detectors, emission of the X-ray transition radiation (TR) starts at Lorentz factors above $γ \sim 500$ and reaches saturation at $γ \sim 2 \div 3 \cdot 1 0^{3}$ . However, many experiments require particle identification up to $γ \sim 1 0^{5}$ , which is very difficult to achieve with conventional detectors. Semiconductor pixel detectors offer a unique opportunity for precise simultaneous measurements of spectral and angular parameters of TR photons. Test beam studies of the energy and the angular distributions of TR photons emitted by electrons and muons of different momenta crossing several types of radiators were performed at the CERN SPS with a 480 $μ$ m thick silicon detector bonded to a Timepix3 chip. High resolution images of the $e n e r g y - a n g l e$ phase space of the TR produced by different radiators were obtained and compared with MC simulations. The characteristic interference patterns are in agreement with the theoretical models with an unprecedented level of details. The studies presented in this paper also show that simultaneous measurements of both the energy and the emission angles of the TR X-rays could be used to enhance the particle identification performances of TRDs.
First measurements of the spectral and angular distribution of transition radiation using a silicon pixel sensor on a Timepix3 chip
2019, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
X-ray Transition radiation detectors (TRDs) are used for particle identification in both high energy physics and astroparticle physics. Particle identification is often achieved based on a threshold effect of the X-ray transition radiation (TR). In most of the detectors, TR emission starts at $γ$ factors above $\sim$ 500 and reaches saturation at $γ \sim 2 - 3 \cdot 1 0^{3}$ . However, many experiments require particle identification up to $γ \sim 1 0^{5}$ , which is difficult to achieve with current detectors, based only on the measurement of the photon energy together with the particle ionization losses. Additional information on the Lorentz factor can be extracted from the angular distribution of TR photons. TRDs based on pixel detectors give a unique opportunity for precise measurements of spectral and angular distributions of TR at the same time. A 500 $μ$ m thick silicon sensor bump bonded to a Timepix3 chip was used in a test beam measurement at the CERN SPS. A beam telescope was employed to separate clusters produced by the primary beam particles from the potential TR clusters. Spectral and angular distributions of TR were studied with high precision for the first time using beams of pions, electrons and muons at different momenta. In this paper, the measurement and analysis techniques are described, and first results are presented.
Identification of particles with Lorentz factor up to 10 <sup>4</sup> with Transition Radiation Detectors based on micro-strip silicon detectors
2019, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
This work is dedicated to the study of a technique for hadron identification in the $TeV$ momentum range, based on the simultaneous measurement of the energies and of the emission angles of the Transition Radiation (TR) X-rays with respect to the radiating particles. A detector setup has been built and tested with particles in a wide range of Lorentz factors (from about $1 0^{3}$ to about $4 \times 1 0^{4}$ crossing different types of radiators. The measured double-differential (in energy and angle) spectra of the TR photons are in a reasonably good agreement with TR simulation predictions.
Electron identification beyond 1 GeV by means of transition radiation
1983, Nuclear Instruments and Methods In Physics Research
We report on measurements with different configurations of transition radiation detectors, performed with electrons in the energy range between 0.75 GeV and 6 GeV. The radiator materials were foils of polyethylene or fibers of polypropylene or carbon. The multiwire proportional chambers for photon detection were operated with krypton, xenon or a mixture of xenon and argon.
The transition radiation yield is compared to theory, and the pion rejection power is reported. It is shown that a very effective particle discrimination can be obtained from a rather simple detector configuration of moderate thickness, low weight and low cost.
Measurement of the energy spectra and of the angular distribution of the Transition Radiation with a silicon strip detector
2019, Journal of Physics: Conference Series

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Particle identification using the angular distribution of transition radiation

Abstract

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.