A new beam monitor at NFS/SPIRAL2 based on position-sensitive PPACs detecting fission fragments from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg" display="inline" id="d1e235"> <mml:msup> <mml:mrow/> <mml:mrow> <mml:mn>238

A new experimental setup has been installed at the Time-Of-Flight area of the Neutrons For Science facility (NFS) at GANIL/SPIRAL2 for neutron beam monitoring. This setup consists of an array of Position-Sensitive Parallel-Plate Avalanche Counters (PS-PPACs) that detects both fission fragments in coincidence from secondary neutron-induced fission reactions in several 238 U targets. The neutron energy is determined on an event-by-event basis using the Time-of-Flight method, and the reaction point within the U targets is reconstructed, enabling the measurement of the neutron beam flux and beam profile. The high transparency of the setup allows it to operate in parallel with other experiments running at NFS, thus providing an in-beam monitor of the neutron intensity. In this work, we report on the characteristics of this new setup, its operating principle, and the first results obtained using the high-intensity white-spectrum neutron beam at NFS. This beam is produced via reactions between a primary 40-MeV deuteron beam, accelerated in the SPIRAL2 LINAC, and a 8 mm-thick rotating beryllium converter target.

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Publication Details

Journal
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
Published
2025-12-31
DOI
https://doi.org/10.1016/j.nima.2025.171251
Primary Topic
Nuclear physics research studies
Type
article
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article

A new beam monitor at NFS/SPIRAL2 based on position-sensitive PPACs detecting fission fragments from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg" display="inline" id="d1e235"> <mml:msup> <mml:mrow/> <mml:mrow> <mml:mn>238

P. Gangnant, C. Le Naour, G. Fremont, M. Maloubier et al.
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
Nuclear physics research studies
article

A new beam monitor at NFS/SPIRAL2 based on position-sensitive PPACs detecting fission fragments from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg" display="inline" id="d1e235"> <mml:msup> <mml:mrow/> <mml:mrow> <mml:mn>238

P. Gangnant, C. Le Naour, G. Fremont, M. Maloubier, L. Audouin, J.C. Foy, D. Ramos, X. Ledoux
article en

Abstract

A new experimental setup has been installed at the Time-Of-Flight area of the Neutrons For Science facility (NFS) at GANIL/SPIRAL2 for neutron beam monitoring. This setup consists of an array of Position-Sensitive Parallel-Plate Avalanche Counters (PS-PPACs) that detects both fission fragments in coincidence from secondary neutron-induced fission reactions in several 238 U targets. The neutron energy is determined on an event-by-event basis using the Time-of-Flight method, and the reaction point within the U targets is reconstructed, enabling the measurement of the neutron beam flux and beam profile. The high transparency of the setup allows it to operate in parallel with other experiments running at NFS, thus providing an in-beam monitor of the neutron intensity. In this work, we report on the characteristics of this new setup, its operating principle, and the first results obtained using the high-intensity white-spectrum neutron beam at NFS. This beam is produced via reactions between a primary 40-MeV deuteron beam, accelerated in the SPIRAL2 LINAC, and a 8 mm-thick rotating beryllium converter target.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated EquipmentVol. 1084
Centre National de la Recherche Scientifique (FR), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris-Saclay (FR), Laboratoire National Henri Becquerel (FR), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR)
Openalex Percentile: Top 21%
Nuclear physics research studies
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A new beam monitor at NFS/SPIRAL2 based on position-sensitive PPACs detecting fission fragments from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg" display="inline" id="d1e235"> <mml:msup> <mml:mrow/> <mml:mrow> <mml:mn>238 — P. Gangnant, C. Le Naour, et al. · Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment (2025) | TGRS Research Map | TGRS