Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 618, Issue 1-3, Pages 54-68Publisher
ELSEVIER
DOI: 10.1016/j.nima.2010.03.005
Keywords
Time-of-flight; Neutron and photon flux distribution; Resolution function; Figure of merit
Categories
Funding
- Commission of the European Communities
- European Commission [FP6-516487]
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A comprehensive set of Monte Carlo simulations was performed with the MCNP5 code to provide a generic characterisation of the neutron and photon fluxes for time-of-flight measurements at all flight paths of the GELINA facility. Simulations were performed for the direct flux configuration (DFC, 10 keV-20 MeV) and the moderated flux configuration (MFC, 10 meV-1 MeV). Fluxes and flux energy spectra were obtained for both neutrons and photons. For neutrons, additionally, detailed resolution functions and figures of merit were obtained. The validity of the approach for the photon spectra is shown by comparison with a dedicated measurement. Also, a verification is presented of the validity of the neutron resolution function by comparison with measured capture and transmission data for Rh-103 and Fe-56 in the incident neutron energy range from 70 eV to 50 key. This comprehensive overview will facilitate the planning and analysis of measurements at the GELINA facility with an improved knowledge of its physical characteristics. (C) 2010 Elsevier B.V. All rights reserved.
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