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Reference : UPR3266-VIRLEF-016
Workplace : CAEN
Date of publication : Friday, June 4, 2021
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 September 2021
Proportion of work : Full time
Remuneration : between 2600 and 3700 euros gross depending on experience
Desired level of education : 5-year university degree
Experience required : 1 to 4 years
The post-doctoral researcher will be in charge of refining the GEANT4 numerical simulation of the FALSTAFF detector in close collaboration with our collaborators at CEA-Saclay/IRFU/DPhN who developed it. He will participate in the design and realization of the precise calibration measurements still needed for this experimental device and will be responsible for the analysis and interpretation of the results. In addition, he will be responsible for the analysis of calibration data taken with the VAMOS spectrometer.
- Numerical simulation of the FALSTAFF detector and of the experiments done with it.
- Responsible for the calibration experiments of the FALSTAFF detector
- Data analysis
The candidate must have a PhD in nuclear physics.
Area of expertise:
- Experimental nuclear physics
- Numerical simulation, programming
- Data analysis
- C++ object-oriented programming
- Use of CERN/ROOT data analysis tools
- Numerical simulation in the GEANT4 environment
- Theoretical and practical knowledge of low pressure gas detectors
Soft skills :
- Team work
- Willingness to share knowledge and to learn
The Grand Accélérateur National d'Ions Lourds (GANIL-SPIRAL2) in Caen is one of the five major laboratories in the world using heavy ion beams for fundamental research in nuclear physics. The intensity and variety of the beams delivered by the cyclotrons and the linear gas pedal, combined with state-of-the-art detectors, make GANIL-SPIRAL2 a unique and exceptional multidisciplinary facility. Several hundred scientists from all over the world come to GANIL-SPIRAL2 each year to carry out their experiments.
The FALSTAFF collaboration started a few years ago the design and construction of a spectrometer for the detection of fission fragments with the aim of studying neutron-induced fission in the kinetic energy range of a few MeV (fast neutrons). The ultimate goal of FALSTAFF is the complete kinematic reconstruction of neutron-induced fission of actinides: determination of the masses of each fragment, their respective kinetic energies and the multiplicity of neutrons evaporated during the reaction. To ensure superior performance to competing experiments in the world in this field, it is essential that the very precise control of the apparatus as well as its numerical simulation be ensured.
The assembly and the first tests of the detector were carried out at CEA-Saclay. The FALSTAFF detector has performances that make it an ideal device for the NFS neutron line of GANIL-SPIRAL2. Thus, a first experiment has been proposed and accepted by the GANIL-SPIRAL2 committee in 2020. The detector is to be moved from CEA-Saclay to GANIL during spring 2021, where it will be prepared for the NFS experiment. At the same time, the development of the detector itself will be considered with the possible addition of a second detection set that will allow the coincident detection of both fission fragments produced in the reactions & thus ensure the ultimate goal pursued by the FALSTAFF collaboration: the complete reconstruction of the fission reactions, event by event.
The post-doctoral fellow will be integrated into the Research Activities group of the GANIL Physics Division.
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