Details

Autor(en) / Beteiligte

• Eriksson, J.
• Castegnetti, G.
• Conroy, S.
• Ericsson, G.
• Giacomelli, L.
• Hellesen, C.

Titel

Deuterium density profile determination at JET using a neutron camera and a neutron spectrometer

Ist Teil von

• Review of scientific instruments, 2014-11, Vol.85 (11)

Erscheinungsjahr

2014

Beschreibungen/Notizen

• In this work we estimate the fuel ion density profile in deuterium plasmas at JET, using the JET neutron camera, the neutron time-of-flight spectrometer TOFOR, and fusion reactivities modeled by the transport code TRANSP. The framework has been tested using synthetic data, which showed that the density profile could be reconstructed with an average accuracy of the order of 10 %. The method has also been applied to neutron measurements from a neutral beam heated JET discharge, which gave nd/ne ≈ 0.6 ± 0.3 in the plasma core and nd/ne ≈ 0.4 ± 0.3 towards the edge. Correction factors for detector efficiencies, neutron attenuation, and back-scattering are not yet included in the analysis; future work will aim at refining the estimated density.