Kv. Alexandrov et al., A transition radiation detector interleaved with low-density targets for the NOE experiment, NUCL INST A, 459(1-2), 2001, pp. 108-122
The NOE Collaboration has proposed a transition radiation detector (TRD) in
terleaved with marble targets to tag the electron decay channel of tau lept
ons produced by v(tau), eventually originated by upsilon (mu) oscillations
in a long base line experiment. A reduced scale TRD detector prototype has
been built and exposed to an electron/pion beam at the CERN PS. Discriminat
ion capabilities between electrons and both charged and neutral pions, repr
esenting the main source of background for our measurement, have been deter
mined obtaining rejection factors of the order of the tenth of percent for
charged pions, and of a few percent for the neutral pion, matching the expe
riment requirements. The capabilities of this detector to measure the energ
y released by particles that start showering inside the targets are shown,
A momentum resolution sigma (p)/p less than or equal to 40% is found for mu
ons in the range of 1-7 GeV/c. (C) 2001 Elsevier Science B.V. All rights re
served.