TY - JOUR
T1 - Joint estimation of the fast and thermal components of a high neutron flux with a two on-line detector system
AU - Filliatre, Philippe
AU - Oriol, Ludovic
AU - Jammes, Christian
AU - Vermeeren, Ludo
PY - 2009/5/21
Y1 - 2009/5/21
N2 - A fission chamber with a 242Pu deposit is the best suited detector for on-line measurements of the fast component of a high neutron flux (∼ 10 14 n cm - 2 s - 1 or more) with a significant thermal component. To get the fast flux, it is, however, necessary to subtract the contribution of the thermal neutrons, which increases with fluence because of the evolution of the isotopic content of the deposit. This paper presents an algorithm that permits, thanks to measurements provided by a 242Pu fission chamber and a detector for thermal neutrons, to estimate the thermal and the fast flux at any time. An implementation allows to test it with simulated data.
AB - A fission chamber with a 242Pu deposit is the best suited detector for on-line measurements of the fast component of a high neutron flux (∼ 10 14 n cm - 2 s - 1 or more) with a significant thermal component. To get the fast flux, it is, however, necessary to subtract the contribution of the thermal neutrons, which increases with fluence because of the evolution of the isotopic content of the deposit. This paper presents an algorithm that permits, thanks to measurements provided by a 242Pu fission chamber and a detector for thermal neutrons, to estimate the thermal and the fast flux at any time. An implementation allows to test it with simulated data.
KW - Fast neutron flux
KW - Fission chambers
KW - Simulation
UR - http://www.scopus.com/inward/record.url?scp=65449156106&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2009.02.013
DO - 10.1016/j.nima.2009.02.013
M3 - Article
AN - SCOPUS:65449156106
SN - 0168-9002
VL - 603
SP - 415
EP - 420
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 3
ER -