Talk by Mirko Salewski, Technical University of Denmark

Velocity-space tomography based on neutrons and gammas from fusion reactions at the tokamak JET

Abstract

JET is the worldwide largest fusion machine and has generated 16 MW of fusion power released in part in the form of neutrons and gamma-rays. Energy spectra of neutrons and gamma-rays have long been used to draw conclusions about the most energetic particles in the fusion plasma. It has this year become possible to measure the 2D velocity distribution of the energetic ions by tomographic inversion relying on three different neutron energy spectrometers and one gamma-ray spectrometer. Here we discuss the method, the challenges and the potential of this new application of velocity-space tomography.