Speaker
Mirko Salewski
(Technical University of Denmark)
Description
The ITER measurement requirements call for diagnosing energy spectra and densities of fusion-born alpha-particles and other energetic particles. This can be accomplished by velocity- or phase-space tomography based on several simultaneously acquired measurements using diagnostics with high spectral resolution, such as gamma-ray spectroscopy (GRS), neutron emission spectroscopy (NES) and collective Thomson scattering (CTS). However, the measurement data is often too sparse to allow a full 2D or 3D inversion. Nevertheless, we demonstrate techniques to infer alpha-particle energy spectra (1D) even for single-detector measurements with high spectral resolution by using the near-isotropy of the alpha distribution as prior information.
Author
Mirko Salewski
(Technical University of Denmark)
