Abstract
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.
Original language | English |
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Pages (from-to) | 415-420 |
Number of pages | 6 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 603 |
Issue number | 3 |
DOIs | |
State | Published - 21 May 2009 |
Funding
This work is a part of the joined FNDS project between CEA and SCK • CEN in the framework of the Laboratoire Commun d’Instrumentation CEA– SCK • CEN (LCI).
Funders | Funder number |
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FNDS - Functional Neurological Disorders Society | |
California Earthquake Authority |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation