Showing papers by "Antonio Ereditato published in 1992"
01 Jun 1992-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: The lateral profile of the energy deposition in a prototype of a lead and scintillating fiber calorimeter, constructed in the framework of the LAA project at CERN, has been measured for both electromagnetic and hadronic showers in the energy range from 5 to 150 GeV.
Abstract: The lateral profile of the energy deposition in a prototype of a lead and scintillating fiber calorimeter, constructed in the framework of the LAA project at CERN, has been measured for both electromagnetic and hadronic showers in the energy range from 5 to 150 GeV. The distributions are well described by analytic functions whose parameters allow one to determine the radial scaling of the shower development. In the electromagnetic case, the data are compared to Monte Carlo calculations. Estimates of the lateral leakage outside of the detector are made as well as calculations of the average π 0 content of hadronic showers and event-to-event fluctuations in this electromagnetic component. A method is developed whereby knowledge of the hadronic shower profile can be used to determine the relative calibration constants of neighboring towers in such a calorimeter.
42 citations
TL;DR: In this article, the neutral current coupling constants of neutrino-electron scattering were determined from a comparison between the data and predicted event distributions, and the effective vector and axial-vector neutral current couplings of the electron were determined to be g e v =−0.025±0.019 and g e A =− 0.503± 0.018, respectively.
30 citations
10 May 1992-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, an experimental study of the performance of a lead/scintillating-fiber calorimeter intended for the detection of leptons, hadrons, gammas and missing energy was performed.
Abstract: We report on an experimental study of the performance of a lead/scintillating-fiber calorimeter intended for the detection of leptons, hadrons, gammas and missing energy. In particular, the effects of reducing the charge collection time down to values that are relevant for experiments at the future proton-proton colliders LHC and SSC are investigated. The total calorimeter signal, the energy resolution, the e/π signal ratio, the signal linearity, the hadronic shower profile and the electron/pion separation capability of the detector are measured as a function of the charge collection time, ranging from 5 to 358 ns. The performance is practically unaffected down to ∼40 ns, even when unrealistically long signal cables are used and no signal shaping is applied. For shorter gates, we observe incomplete charge collection, a gradually deteriorating energy resolution, an increase in the e/π signal ratio and in the hadronic signal nonlinearity, a narrowing of the hadronic shower profile and a degradation of the electron/pion separation. However, even for gates as short as the LHC/SSC bunch-bunch spacing (∼ 15 ns), these effects are not unacceptably large. The experiments were performed in the framework of the LAA project at CERN.
18 citations
15 Aug 1992-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, an experimental study of the signals from high-energy (5 −225 GeV) muons traversing a 9.5 interaction lengths deep electromagnetic/hadronic calorimeter consisting of lead and scintillating plastic fibers, constructed at CERN in the framework of the LAA project, was conducted.
Abstract: We report on an experimental study of the signals from high-energy (5–225 GeV) muons traversing a 9.5 interaction lengths deep electromagnetic/hadronic calorimeter consisting of lead and scintillating plastic fibers, constructed at CERN in the framework of the LAA project. The muons lose on average between 2.6 GeV (at 5 GeV) and 8.8 GeV (at 225 GeV) in this process. This energy loss can be measured with a precision of a fraction of a GeV in most of the events. Accuracy in the energy loss measurements is important since the rms spread in the energy loss of muons traversing this calorimeter is not smaller than ∼6% at any energy. The nominal calibration constants, derived from the calorimeter response to electromagnetic showers, are found to be incorrect for the muon signals. On average, these calibration constants are between 40% (for low energy muons) and 15% (high energy) too high. The fiber bunches sticking out of the back plane of the calorimeter for readout purposes cause the muon signals to be position dependent. This can cause an anomalous enhancement of the muon signal of up to 35%. A moderate position resolution of ∼ 1 cm is sufficient to correct for this effect. The e/mip ratio was found to be 0.72±0.03.
16 citations