Temporary contract for the Development of optical readout for neutron imaging

Duration of 18 months from starting date (possible extension to 2 years if fundings are obtained). To be filled between Oct. 2024 and Jan. 2025, at CEA Paris-Saclay, France.

We are currently seeking a talented and highly qualified candidate to contribute to the development of detection systems for neutron imaging based on optical readout.

CEA is leading two projects of neutron sources that will be dedicated to neutron scattering and neutron radiography: TITAN and ICONE, which will strongly benefit from any progress in thermal neutron detection technologies. In this context, we recently obtained funding to develop two prototypes for neutron imaging using a camera equipped with the newly available SPADs (Single Photon Avalanche Diode) sensors coupled to a scintillator screen or a Micromegas detector.

Recent developments have shown that coupling a Micromegas detector on a glass substrate with a transparent anode and a CCD camera enable the optical readout of Micromegas detectors with an impressive spatial resolution showing that the glass Micromegas detector is well suited for imaging. Promising results have been obtained also using a scintillator as sensitive material.

The postdoc will work on the characterization and optimization of both prototypes. This study will involve both Monte Carlo simulation and experimental tests in laboratory in order to estimate the effect of several parameters (gas composition, neutron converter, drift gap, electric field configuration, scintillator type and thickness, etc.). The post-doc will also be in charge of developing an analysis procedure using pattern recognition techniques. The prototype will be eventually tested in beam, either at Saclay or at other facilities delivering a neutron beam as ILL in Grenoble and PSI in Zurich.

The candidate will work closely with nuclear physicists at the Nuclear Physics Department of IRFU, gaseous detector physicists at the Detector and Electronics Department of IRFU, and neutron scattering experts at the IRAMIS Institute of CEA Saclay.

Candidate profile :

- Master or PhD in applied nuclear physics or high-energy physics;

- Experience in Monte Carlo simulation codes such as GEANT4, and eventually with the Garfield++ toolkit;

- Interest in designing detectors and performing experimental tests;

- High motivation to work within a multidisciplinary project;

- Curiosity and enthusiasm.

Interested candidates should submit cover letter, curriculum vitae with a publication list, and the contact of at least one reference person to:

- Anna CORSI: anna.corsi@cea.fr

- Thomas PAPAEVANGELOU: thomas.papaevangelou@cea.fr