Contributo in atti di convegno, 2019, ENG

Development of Nuclear Radiation Based Tomography Methods for Runaway Electrons in Fusion Plasmas: First Results and Prospects

Panontin E.; Dal Molin A.; Nocente M.; Tardocchi M.; Causa F.; Eriksson J.; Giacomelli L.; Gorini G.; Rigamonti D.; Salewski M.; ASDEX Upgrade Team

Department of Physics, Università degli Studi di Milano-Bicocca, Milan, Italy; Istituto di Fisica del Plasma, CNR, Milan, Italy; CNR ISTP, Istituto per la Scienza e Tecnologia dei Plasmi, Milano, Italy; Department of Physics and Astronomy, Uppsala University, Sweden; Department of Physics, Technical University of Denmark, Kgs. Lyngby, Denmark.

The study of Runaway Electron (RE) physics and their response to mitigation strategies is crucial to safeguard ITER structural integrity. During their motion REs collide with background ions before hitting the inner vessel of the machine and thus they emit Bremsstrahlung photons in the gamma range of the spectrum. It is possible to detect such radiation using a LaBr3(Ce) spectrometer with counting rate capability in the MHz range and high energy resolution [1][5]. The measured spectra contain information about the RE energy distribution, which can be reconstructed using specific inversion (or econvolution) algorithms. The deconvolution operation is computationally faster than first principles simulations and its use in RE studies might be many fold: it can be used to improve synthetic diagnostic calculations or as a preliminary method for RE spectra analysis.

46th EPS Conference on Plasma Physics, pp. 1–4, Milano - Italy, 8-12 July 2019

Keywords

Nuclear Radiation Tomography Methods, Runaway Electrons, Fusion Plasmas

CNR authors

Gorini Giuseppe, Rigamonti Davide, Nocente Massimo, Giacomelli Luca Carlo, Causa Federica, Tardocchi Marco

CNR institutes

IFP – Istituto di fisica del plasma "Piero Caldirola", ISTP – Istituto per la Scienza e Tecnologia dei Plasmi