General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DES-24-0087
Thesis topic details
Category
Engineering science
Thesis topics
Design and realization of a high-temperature optical neutron detector. Application to an experimental program in the JOYO reactor
Contract
Thèse
Job description
As part of the development of fourth-generation sodium-cooled fast reactors, the CEA/IRESNE Dosimetry and Instrumentation Laboratory is working on innovative neutron measurement systems capable of operating at temperatures of the order of 600°C, and insensitive to the parasitic phenomena that occur under these conditions. Recently, a new type of optical signal neutron detector (ODN) has been developed at the laboratory. Despite a more complex signal interpretation, this instrument has several advantage: it can be miniaturized and it is intrinsically insensitive to problems of partial discharges and leakage currents that occur in ionization chambers at high temperature.
We propose to pursue the theoretical and experimental development of ODNs to adapt them to high temperatures. The PhD student will further develop the modelling tools already available in the laboratory for simulating the detector response. The work will investigate heavy ion-noble gas interaction cross sections, also a radiative collisional model to predict emission spectra and their temporal dynamics. Part of the work will involve dimensioning a high-temperature prototype and testing it in the JSI TRIGA reactor. Ultimately, the detector will be qualified in the JOYO research reactor as part of a broader experimental program.
University / doctoral school
Ingénierie - Matériaux - Environnement - Energétique - Procédés - Production (IMEP2)
Université Grenoble Alpes
Thesis topic location
Site
Cadarache
Requester
Position start date
01/10/2024
Person to be contacted by the applicant
DE IZARRA Grégoire gregoire.DEIZARRA@cea.fr
CEA
DES/DER//LDCI
Dr Grégoire DE IZARRA
IRESNE, DES, DER/SPESI/LDCI Bât. 238
CEA, Centre de Cadarache
13108 Saint Paul-lès-Durance Cedex
+33 (0)4 4225 2992
Tutor / Responsible thesis director
FILLIATRE Phillipe philippe.filliatre@cea.fr
CEA
DEN/DER/SPESI/LDCI
CEA – Centre de Cadarache
13108 Saint Paul-lès-Durance
04 42 25 78 08
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