Measurement of the Contribution of Neutrons to Hadron Calorimeter Signals

Details Measurement of the Contribution of Neutrons to Hadron Calorimeter Signals Measurement of the Contribution of Neutrons to Hadron Calorimeter Signals

2007-07-26

arxiv.org/abs/0707.4019v1

Nucl.Instrum.Meth.A581:643-650,2007

Physics

Instrumentation and Detectors

Preprint submitted to Nucl. Instr. and Meth. on July 24, 2007

Scientific paper

10.1016/j.nima.2007.08.049

The contributions of neutrons to hadronic signals from the DREAM calorimeter are measured by analyzing the time structure of these signals. The neutrons, which mainly originate from the evaporation stage of nuclear breakup in the hadronic shower development process, contribute through elastic scattering off protons in the plastic scintillating fibers which provide the $dE/dx$ information in this calorimeter. This contribution is characterized by an exponential tail in the pulse shape, with a time constant of $\sim 25$ ns. The relative contribution of neutrons to the signals increases with the distance from the shower axis. As expected, the neutrons do not contribute to the DREAM \v{C}erenkov signals.

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