Characterisation of collectrons

ATRON Metrology is collaborating on a doctoral thesis funded by the French Alternative Energies and Atomic Energy Commission (CEA) to deepen the understanding of the functioning of collectrons, key neutron detectors used in nuclear reactors.

Nuclear reactor Electronic irradiation Materials Physics

Description

As part of a thesis financed by the CEA (the French Alternative Energies and Atomic Energy Commission) through the Nuclear Instrumentation project of the Gen2&3 programme, ATRON Metrology carried out tests using its FELIX electron beam, in collaboration with the IRESNE/DER/SPESI/LDCI laboratory (Cadarache) and the LPC (Caen).

Collectrons, or Self-Powered Neutron Detectors (SPNDs), are coaxial detectors made up of two metallic electrodes insulated by a ceramic material, typically alumina (Al₂O₃). They generate an electric current proportional to the neutron flux they detect in reactors.

To better understand the role of the ceramic insulator, Al₂O₃ samples were irradiated in ATRON’s LAETICIA chamber using electrons from the FELIX accelerator. The beam energy (~1 MeV) and intensity (~µA) were precisely controlled. These measurements help to decipher the physical phenomena occurring in the insulator that are responsible for the generation of the continuous current detected by collectrons under real reactor conditions.

Le projet en images

Similar projects

Imaging Artificial intelligence

Characterisation of a pixelated detector

The French National Centre for Space Studies (CNES) called on ATRON Metrology to train the artificial intelligence of a Timepix detector to recognise particles and determine their energy.

See project

Radiation protection Transparency

Irradiation of materials for Lemer Pax

ATRON Metrology is carrying out the qualification of Novashield Glass, a new material developed by Lemer Pax for use in viewing windows or shielding screens.

See project

Corrosion Tailor-made testing

Corrosion under ionising radiation

In partnership with Corrodys, ATRON Metrology is exploring the mechanisms of corrosion and biocorrosion in metallic materials exposed to ionising radiation.

See project

Retour aux réalisations

They trust us

A question?

Do you have a question or need information about our services? Our sales department is at your disposal !