High purity 100 GeV electron identification with synchrotron radiation
Abstract
In high energy experiments such as active beam dump searches for rare decays and missing energy events, the beam purity is a crucial parameter. In this paper we present a technique to reject heavy charged particle contamination in the 100 GeV electron beam of the H4 beam line at CERN SPS. The method is based on the detection with BGO scintillators of the synchrotron radiation emitted by the electrons passing through a bending dipole magnet. A 100 GeV beam is used to test the method in the NA64 experiment resulting in a suppression factor of while the efficiency for electron detection is 95%. The spectra and the rejection factors are in very good agreement with the Monte Carlo simulation. The reported suppression factors are significantly better than previously achieved.
Cite
@article{arxiv.1703.05993,
title = {High purity 100 GeV electron identification with synchrotron radiation},
author = {E. Depero and D. Banerjee and V. Burtsev and A. Chumakov and D. Cooke and A. V. Dermenev and S. V. Donskov and F. Dubinin and R. R. Dusaev and S. Emmenegger and A. Fabich and V. N. Frolov and A. Gardikiotis and S. N. Gninenko and M. Hösgen and A. E. Karneyeu and B. Ketzer and M. M. Kirsanov and I. V. Konorov and V. A. Kramarenko and S. V. Kuleshov and V. E. Lyubovitskij and V. Lysan and V. A. Matveev and Yu. V. Mikhailov and V. V. Myalkovskiy and V. D. Peshekhonov and D. V. Peshekhonov and V. A. Polyakov and B. Radics and A. Rubbia and V. D. Samoylenko and V. O. Tikhomirov and D. A. Tlisov and A. N. Toropin and B. Vasilishin and G. Vasquez Arenas and P. Ulloa and P. Crivelli},
journal= {arXiv preprint arXiv:1703.05993},
year = {2017}
}
Comments
10 pages, 6 figures