Radiation from Relativistic Electrons in Periodic Structures "RREPS-19"

Effect of interference in angular distribution and new opportunities for Transition Radiation Detectors

18 Sept 2019, 09:40

20m

Oral Transition radiation Transition Radiation

Speaker

Aleksandr Savchenko (National Research Nuclear University MEPhI (RU))

Description

Identification of ultra-relativistic hadrons with a good precision is a challenge for the Detector Physics. The only known way to identify multi-TeV hadrons (Pi, K and p) is using Transition Radiation Detectors. This type of detectors, however, also requires improvements to satisfy all modern requirements [1 - 3]. For that to be done, it is necessary to know all features of transition radiation. In this report we present new theoretical results concerning complex interference structure of angular distribution of transition radiation [4]. Also, recent experimental [5 – 7] results are compared with the theory and simulations in GEANT4 [8]; the latter was modified in accordance with recent theoretical and experimental results.

1. Materials of the First meeting on Small Angle Spectrometer at LHC https://indico.cern.ch/event/435373/
2. M.L. Cherry, Measuring the Lorentz factors of energetic particles with transition radiation, Nucl. Inst. and Meth. A 706, 39 (2013).
3. M.L. Cherry, G.L. Case, Compton scattered transition radiation from very high energy particles, Astroparticle Physics 18, 629 (2003).
4. A.A. Savchenko, D.Yu. Sergeeva, A.A. Tishchenko, M.N. Strikhanov, Small-angle X-ray transition radiation from multilayered structures, Phys. Rev. D 99, 016015 (2019).
5. E. Schioppa, F. Dachs, J. Alozy et al., First measurements of the spectral and angular distribution of transition radiation using a silicon pixel sensor on a Timepix3 chip, Nucl. Inst. and Meth. A 936, 523 (2019).
6. J. Alozy, N. Belyaev, M. Campbell et al., Identification of particles with Lorentz factor up to 104 with Transition Radiation Detectors based on micro-strip silicon detectors, Nucl. Inst. and Meth. A 927, 1 (2019).
7. F. Dachs, J. Alozy, N. Belyaev et al., Transition radiation measurements with a Si and a GaAs pixel sensor on a Timepix3 chip, Nucl. Inst. and Meth. A, in Press, https://doi.org/10.1016/j.nima.2019.03.092 (2019).
8. GEANT4, version 10.4, official web-sites, http://www.geant4.org/geant4/; http://geant4.web.cern.ch/geant4/