title: A Bonner Sphere Spectrometer for pulsed fields.
abstract: The use of conventional Bonner Sphere Spectrometers (BSS) in pulsed neutron fields (PNF) is limited by the fact that proportional counters, usually employed as the thermal neutron detectors, suffer from dead time losses and show severe underestimation of the neutron interaction rate, which leads to strong distortion of the calculated spectrum. In order to avoid these limitations, an innovative BSS, called BSS-LUPIN, has been developed for measuring in PNF. This paper describes the physical characteristics of the device and its working principle, together with the results of Monte Carlo simulations of its response matrix. The BSS-LUPIN has been tested in the stray neutron field at the CERN Proton Synchrotron, by comparing the spectra obtained with the new device, the conventional CERN BSS and via Monte Carlo simulations.
authors.affiliation: CERN, Geneva 23 CH-1211, Switzerland Department of Physics, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece.
authors.forename: E
authors.initials: E
authors.lastname: Aza
authors.affiliation: CERN, Geneva 23 CH-1211, Switzerland.
authors.forename: N
authors.initials: N
authors.lastname: Dinar
authors.affiliation: CERN, Geneva 23 CH-1211, Switzerland Department of Physics, University of Liverpool, Liverpool L69 7ZE, UK.
authors.forename: G P
authors.initials: GP
authors.lastname: Manessi
authors.affiliation: CERN, Geneva 23 CH-1211, Switzerland marco.silari@cern.ch.
authors.forename: M
authors.initials: M
authors.lastname: Silari
mesh_terms: D003198:Computer Simulation; D006801:Humans; D009010:Monte Carlo Method; D009502:Neutrons; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D017356:Synchrotrons / Q000295:instrumentation*