Transition Radiation Spectra of Electrons from 1 to 10 GeV/c in Regular and Irregular Radiators

Abstract

We present measurements of the spectral distribution of transition radiation generated by electrons of momentum 1 to 10 GeV/c in different radiator types. We investigate periodic foil radiators and irregular foam and fiber materials. The transition radiation photons are detected by prototypes of the drift chambers to be used in the Transition Radiation Detector (TRD) of the ALICE experiment at CERN, which are filled with a Xe, CO2 (15 %) mixture. The measurements are compared to simulations in order to enhance the quantitative understanding of transition radiation production, in particular the momentum dependence of the transition radiation yield.

18 pages, 15 figures, submitted to Nucl. Instr. Meth. Phys. Res. A

References in corpus (7)

• Drift velocity and gain in argon- and xenon-based mixtures
• Electron identification performance with ALICE TRD prototypes
• Energy loss of pions and electrons of 1 to 6 GeV/c in drift chambers operated with Xe,CO2(15%)
• Pulse height measurements and electron attachment in drift chambers operated with Xe,CO2 mixtures
• Space charge in drift chambers operated with the Xe,CO2(15%) mixture
• Position Reconstruction in Drift Chambers operated with Xe, CO2 (15%)
• Transition Radiation Spectroscopy with Prototypes of the ALICE TRD

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