| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1828757 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2009 | 6 Pages |
Abstract
A fission chamber with a Pu242 deposit is the best suited detector for on-line measurements of the fast component of a high neutron flux (∼1014ncm-2s-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 Pu242 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.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
P. Filliatre, L. Oriol, C. Jammes, L. Vermeeren,