Neutron induced pulses in CDF forward hadron calorimeter
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The use of calorimeters with very small energy sampling fractions (of the order of a few percent or less) can result in small energy fluctuations in the showers which are interpreted as large equivalent energy depositions in the calorimeter. We have studied the nature of such fluctuations in the forward hadron calorimeter (FHA) system of the Collider Detector at Fermilab (CDF). Our results are consistent with the hypothesis that these fluctuations are due to interactions of low energy neutrons produced in the hadronic showers of the absorbed particles with the hydrogenous material which make up the calorime-ter's structure or filling. These neutrons elastically scatter the protons in these hydrogen compounds which heavily ionize the active media of the calorimeter creating additional observed energy. We present the characteristics of these energy fluctuations and calculate an effective cross section for their production using data avilable from neutron source measurements, test beam and colliding beam runs. © 1989 IEEE
author list (cited authors)
Cihangir, S., Atac, M., Cao, H., DiBitonto, D., Franke, H., Hessing, T., ... Funayama, Y.