TY - JOUR
T1 - Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak
AU - Moseev, Dmitry
AU - Meo, Fernando
AU - Korsholm, Søren Bang
AU - Koskela, T
AU - Albergante, M
AU - Asunta, O
AU - Bindslev, Henrik
AU - Bürger, A
AU - Furtula, Vedran
AU - Kantor, M Yu
AU - Leipold, Frank
AU - Michelsen, Poul
AU - Nielsen, Stefan Kragh
AU - Salewski, Mirko
AU - Schmitz, O
AU - Stejner Pedersen, Morten
AU - Westerhof, E
PY - 2011
Y1 - 2011
N2 - Here we demonstrate a comprehensive comparison of collective Thomson scattering (CTS) measurements with steady-state Monte Carlo simulations performed with the ASCOT and VENUS codes. The measurements were taken at a location on the magnetic axis as well as at an off-axis location, using two projection directions at each location. The simulations agree with the measurements on-axis, but for the off-axis geometries discrepancies are observed for both projection directions. For the near perpendicular projection direction with respect to the magnetic field, the discrepancies between measurement and simulations can be explained by uncertainty in plasma parameters. However, the discrepancies between measurement and simulations for the more parallel projection direction cannot be explained solely by uncertainties in plasma parameters. Here anomalous fast ion transport is a possible explanation for the discrepancy.
AB - Here we demonstrate a comprehensive comparison of collective Thomson scattering (CTS) measurements with steady-state Monte Carlo simulations performed with the ASCOT and VENUS codes. The measurements were taken at a location on the magnetic axis as well as at an off-axis location, using two projection directions at each location. The simulations agree with the measurements on-axis, but for the off-axis geometries discrepancies are observed for both projection directions. For the near perpendicular projection direction with respect to the magnetic field, the discrepancies between measurement and simulations can be explained by uncertainty in plasma parameters. However, the discrepancies between measurement and simulations for the more parallel projection direction cannot be explained solely by uncertainties in plasma parameters. Here anomalous fast ion transport is a possible explanation for the discrepancy.
KW - Fusion energy
KW - Fusionsenergiforskning
U2 - 10.1088/0741-3335/53/10/105004
DO - 10.1088/0741-3335/53/10/105004
M3 - Journal article
SN - 0741-3335
VL - 53
SP - 105004
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
IS - 10
ER -