Measurement of the energy spectra and of the angular distribution of the Transition Radiation with a silicon strip detector

Francesco Loparco ,S Yu Smirnov ,F Gargano ,E Vallazza ,D Yu Sergeeva ,M Campbell ,X Llopart ,K Filippov ,P Fusco ,M Van Beuzekom ,C Rembser ,Y Smirnov ,K Vorobev ,F Dachs ,V O Tikhomirov ,D Pyatiizbyantseva ,H Pernegger ,M L Cherry ,V Mascagna ,D Ponomarenko ,E Heijne ,E J Schioppa ,Dmitry G Shchukin ,D Krasnopevtsev ,A A Tishchenko ,Bas Van Der Heijden ,D Schaefer ,S Konovalov ,N L Belyaev ,A Romaniouk ,E Shulga ,J Alozy ,P Spinelli ,S Doronin ,M Prest ,A A Savchenko ,M Strikhanov ,P Teterin ,R Radomskii ,M Soldani ,M N Mazziotta ,K Zhukov

doi:10.1088/1742-6596/1390/1/012115

Abstract

We plan to develop an advanced Transition Radiation Detector (TRD) 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. To study the feasibility of this project, we have carried out a beam test campaign at the CERN SPS facility with 20 GeV/c electrons and muons up to 300 GeV/c. To detect the TR X-rays and the radiating particles, we used a 300 μm thick double-sided silicon strip detector, with a strip readout pitch of 50 μm. A 2 m long helium pipe was placed between the radiators and the detector, in order to ensure adequate separation between the TR X-rays and the radiating particle on the detector plane and to limit the X-ray absorption before the detector. We measured the double-differential (in energy and angle) spectra of the TR emitted by several radiators. The results are in good agreement with the predictions obtained from the TR theory.

Highlights

Identification of high-energy hadrons is one of the most demanding challenges for the design of future detectors for both accelerator and cosmic-ray physics applications
From our data we have evaluated the double-differential spectrum d2N/dθdω of the Transition Radiation (TR) X-rays emitted by the mylar radiator as a function of the photon energy ω and of the emission angle θ
To provide an interpretation of the data, we have developed a custom Monte Carlo code which includes a full simulation of the physics processes and of the detector response

Summary

Introduction

Identification of high-energy hadrons is one of the most demanding challenges for the design of future detectors for both accelerator and cosmic-ray physics applications. We plan to develop an advanced Transition Radiation Detector (TRD) 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. To detect the TR X-rays and the radiating particles, we used a 300 μm thick double-sided silicon strip detector, with a strip readout pitch of 50 μm.

Results

Conclusion