Title

First measurements of the spectral and angular distribution of transition radiation using a silicon pixel sensor on a Timepix3 chip

Authors

E. J. Schioppa, European Organization for Nuclear Research
F. Dachs, European Organization for Nuclear Research
J. Alozy, European Organization for Nuclear Research
N. Belyaev, National Research Nuclear University MEPhI
M. Campbell, European Organization for Nuclear Research
M. Cherry, Louisiana State University
S. Doronin, National Research Nuclear University MEPhI
K. Filippov, National Research Nuclear University MEPhI
P. Fusco, Politecnico di Bari
F. Gargano, Istituto Nazionale di Fisica Nucleare, Sezione di Bari
E. H.M. Heijne, European Organization for Nuclear Research
S. Konovalov, P.N. Lebedev Physical Institute of the Russian Academy of Sciences
D. Krasnopevtsev, National Research Nuclear University MEPhI
X. Llopart, European Organization for Nuclear Research
F. Loparco, Politecnico di Bari
V. Mascagna, Istituto Nazionale di Fisica Nucleare, Sezione di Milano-Bicocca
M. N. Mazziotta, Istituto Nazionale di Fisica Nucleare, Sezione di Bari
H. Pernegger, European Organization for Nuclear Research
D. Ponomarenko, National Research Nuclear University MEPhI
M. Prest, Istituto Nazionale di Fisica Nucleare, Sezione di Milano-Bicocca
D. Pyatiizbyantseva, National Research Nuclear University MEPhI
R. Radomskii, National Research Nuclear University MEPhI
C. Rembser, European Organization for Nuclear Research
A. Romaniouk, National Research Nuclear University MEPhI
E. Shulga, National Research Nuclear University MEPhI
S. Smirnov, National Research Nuclear University MEPhI
Y. Smirnov, National Research Nuclear University MEPhI
M. Soldani, Istituto Nazionale di Fisica Nucleare, Sezione di Milano-Bicocca
P. Spinelli, Politecnico di Bari
D. Yu Sergeeva, National Research Nuclear University MEPhI
A. A. Savchenko, National Research Nuclear University MEPhI
D. Schaefer, The University of Chicago
M. Strikhanov, National Research Nuclear University MEPhI

Document Type

Article

Publication Date

8-21-2019

Abstract

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 ∼500 and reaches saturation at γ∼2−3⋅103. However, many experiments require particle identification up to γ∼105, 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 μm 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.

Publication Source (Journal or Book title)

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

First Page

523

Last Page

526

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