TY - JOUR
T1 - Benchmark and combined velocity-space tomography of fast-ion D-alpha spectroscopy and collective Thomson scattering measurements
AU - Jacobsen, Asger Schou
AU - Salewski, Mirko
AU - Geiger, B.
AU - Korsholm, Søren Bang
AU - Leipold, Frank
AU - Nielsen, Stefan Kragh
AU - Rasmussen, Jesper
AU - Pedersen, Morten Stejner
AU - Weiland, M.
PY - 2016
Y1 - 2016
N2 - We demonstrate the combination of fast-ion D-alpha spectroscopy (FIDA) and collective Thomson scattering (CTS) measurements to determine a common best estimate of the fastion velocity distribution function by velocity-space tomography. We further demonstrate a benchmark of FIDA tomography and CTS measurements without using a numerical simulation as common reference. Combined velocity-space tomographies from FIDA and CTS measurements confirm that sawtooth crashes reduce the fast-ion phase-space densities in the plasma center and affect ions with pitches close to one more strongly than those with pitches close to zero.
AB - We demonstrate the combination of fast-ion D-alpha spectroscopy (FIDA) and collective Thomson scattering (CTS) measurements to determine a common best estimate of the fastion velocity distribution function by velocity-space tomography. We further demonstrate a benchmark of FIDA tomography and CTS measurements without using a numerical simulation as common reference. Combined velocity-space tomographies from FIDA and CTS measurements confirm that sawtooth crashes reduce the fast-ion phase-space densities in the plasma center and affect ions with pitches close to one more strongly than those with pitches close to zero.
KW - Velocity-space tomography
KW - Collective Thomson scattering
KW - Fast-ion D-alpha spectroscopy
KW - Sawtooth crash
KW - Tokamak
U2 - 10.1088/0741-3335/58/4/042002
DO - 10.1088/0741-3335/58/4/042002
M3 - Journal article
SN - 0741-3335
VL - 58
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
IS - 4
M1 - 042002
ER -