TY - JOUR
T1 - Performance studies of lead/scintillating-fibre calorimeters in the 1 to 10 GeV range
AU - Barrelet, E.
AU - Borhani, A.
AU - Castera, A.
AU - Canton, B.
AU - Dagoret, S.
AU - Denance, J. P.
AU - Imbaut, D.
AU - Kovacs, F.
AU - Lacour, D.
AU - Lamarche, F.
AU - Moreau, F.
AU - Sirois, Y.
AU - Yiou, T. P.
AU - Zitoun, R.
PY - 1994/7/15
Y1 - 1994/7/15
N2 - Three calorimeter modules made of scintillating fibres embedded in a lead matrix were tested at the CERN Proton Synchrotron. The linearity of the energy response to electron-induced showers, measured in a module having a lead-to-fibre volume ratio of 1.8, is verified within 2.5% whilst the energy resolution is found to be 9.6% E + 1% at 6° and 4° impact angles in the horizontal and vertical planes. An impact position resolution of 1.51 mm E + 1.45 mm is achieved. The e/π± separation based on the longitudinal and transverse shower size is discussed for various calorimeter configurations. Requiring an energy above a threshold of 3 GeV leads to a π± rejection factor of 12 to 36 with longitudinal criterium, and a π± rejection factor of 43 to 100 with a transverse cut in a π± energy range of 3 to 7 GeV. A combination of both criteria leads to a rejection factor between 116 and 303 in the same energy range. The study of the time shape of the signals shows a very small intrinsic jitter of 0.4 ns on the calorimeter signals. It does not show any evidence of a detectable neutronic tail in π± signals.
AB - Three calorimeter modules made of scintillating fibres embedded in a lead matrix were tested at the CERN Proton Synchrotron. The linearity of the energy response to electron-induced showers, measured in a module having a lead-to-fibre volume ratio of 1.8, is verified within 2.5% whilst the energy resolution is found to be 9.6% E + 1% at 6° and 4° impact angles in the horizontal and vertical planes. An impact position resolution of 1.51 mm E + 1.45 mm is achieved. The e/π± separation based on the longitudinal and transverse shower size is discussed for various calorimeter configurations. Requiring an energy above a threshold of 3 GeV leads to a π± rejection factor of 12 to 36 with longitudinal criterium, and a π± rejection factor of 43 to 100 with a transverse cut in a π± energy range of 3 to 7 GeV. A combination of both criteria leads to a rejection factor between 116 and 303 in the same energy range. The study of the time shape of the signals shows a very small intrinsic jitter of 0.4 ns on the calorimeter signals. It does not show any evidence of a detectable neutronic tail in π± signals.
U2 - 10.1016/0168-9002(94)90698-X
DO - 10.1016/0168-9002(94)90698-X
M3 - Article
AN - SCOPUS:0028465334
SN - 0168-9002
VL - 346
SP - 137
EP - 152
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-2
ER -