Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5492941 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2017 | 6 Pages |
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 Ïâ beam is used to test the method in the NA64 experiment resulting in a suppression factor of 10â5 while the efficiency for electron detection is â¼95%. 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.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
E. Depero, D. Banerjee, V. Burtsev, A. Chumakov, D. Cooke, A.V. Dermenev, S.V. Donskov, F. Dubinin, R.R. Dusaev, S. Emmenegger, A. Fabich, V.N. Frolov, A. Gardikiotis, S.N. Gninenko, M. Hösgen, A.E. Karneyeu, B. Ketzer, M.M. Kirsanov, P. Crivelli,