X-Ray and Neutron Tomography of Thermonuclear Plasmas
A. Jardina, J. Bieleckia, D. Mazonb, J. Dankowskia, K. Króla, Y. Peyssonb, M. Scholza, A. Kulinskaa, L. Marciniaka
aInstitute of Nuclear Physics, the Polish Academy of Sciences (IFJ PAN), W.E. Radzikowskiego 152, PL-31342 Krakow, Poland
bCEA, IRFM, F-13108 Saint Paul-lez-Durance, France
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X-ray radiation and neutrons emitted from thermonuclear plasmas, like in tokamaks and plasma-focus devices, contain valuable information on the plasma dynamics and transport properties. Developing diagnostic tomography methods to retrieve the plasma emissivity from sparse measurement sets is thus an important issue. In this work, we report the development of a tomography method based on neural networks to achieve fast X-ray emissivity reconstructions in the prospect of real-time impurity control, with the first experimental test on a Tore Supra plasma subject to tungsten impurity injection. In parallel, preliminary investigations of neutron spectrum deconvolution on the PF-24 source from time-of-flight measurements using a Monte Carlo approach have been performed, including the assessment of robustness against experimental noise.

topics: X-ray, neutron, plasma tomography, tokamak