On the road to a fusion reactor, a thorough control of the fast-ion distribution plays a crucial
role. Fusion-born α α-particles are, indeed, a necessary ingredient of self-sustained burning …

We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by
velocity-space tomography at JET. Deuterium ions were accelerated into the MeV-range by …

The velocity-space observation regions and sensitivities in fast-ion D α (FIDA) spectroscopy
measurements are often described by so-called weight functions. Here we derive …

Recent upgrades to the FIDA (fast-ion D-alpha) diagnostic at ASDEX Upgrade are
discussed. The diagnostic has been extended from three to five line of sight arrays with …

Velocity-space tomography of the fast-ion distribution function in a fusion plasma is usually a
photon-starved tomography method due to limited optical access and signal-to-noise ratio of …

High-resolution γ-ray spectroscopy (GRS) measurements resolve spectral shapes of
Doppler-broadened γ-rays. We calculate weight functions describing velocity-space …

We discuss α-particle velocity-space diagnostic in ITER based on the planned collective
Thomson scattering (CTS) and γ-ray spectrometry (GRS) systems as well as ASCOT …

Neutron emission spectrometry (NES) measures the energies of neutrons produced in
fusion reactions. Here we present velocity-space weight functions for NES and neutron yield …

The spectral broadening of γ-rays from fusion plasmas can be measured in high-resolution
gamma-ray spectrometry (GRS). We derive weight functions that determine the observable …

Velocity-space tomography has been used to infer 2D fast-ion velocity distribution functions.
Here we compare the performance of five different tomographic inversion methods …