Volume 126, Number 1, April 2019
|Number of page(s)||5|
|Published online||20 May 2019|
On the slowing-down of 14 MeV fusion neutrons: A spectrometry benchmark and perspectives on future neutron science facilities
1 ENEA, Department of Fusion and Technologies for Nuclear Safety and Security - via E. Fermi 45, I-00044 Frascati, Roma, Italy
2 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati - via E. Fermi 44, I-00044, Frascati, Roma Italy
Received: 22 February 2019
Accepted: 4 April 2019
The spectral fluence rate of the thermalized neutron field obtained by slowing down the 14 MeV fusion neutrons produced at the accelerator-driven Frascati Neutron Generator is measured by means of the Bonner Sphere Spectrometer. Neutron thermalization is achieved by means of a moderator assembly made of a copper pre-moderator and a polyethylene moderator. A Monte Carlo simulation reproducing the experimental set-up is also performed by means of the MCNP code and the results are compared to the experimental data. The benchmarked Monte Carlo is then used to predict the brilliance of a thermal moderator operating at a potential high-intensity 14 MeV neutron continuous source featuring a neutron emission rate of . The results obtained show that if a D-T neutron source featuring a continuous neutron emission rate of could be made operative, it could be effectively exploited for neutron science.
PACS: 28.41.Pa – Moderators / 28.52.Lf – Components and instrumentation
© EPLA, 2019
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