title: A numerical study of fixed frequency reflectometry measurements of plasma filaments with radial and poloidal velocity components.
abstract: A 2D finite-differences time-domain full-wave code is used to simulate the measurements of plasma filaments with fixed frequency O-mode reflectometry. The plasma is modeled by a linear slab plasma plus a Gaussian perturbation propagating in a direction that can vary from poloidal to radial. The plasma background density gradient is chosen in agreement with the steep edge transport barrier of H-modes in the ASDEX Upgrade (AUG) tokamak. Illustrative results are presented and different types of reflectometry responses are observed depending on filament sizes and propagation directions. The reflectometry signatures obtained here with numerical simulations support previous experimental findings on filament measurements.
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: J
authors.initials: J
authors.lastname: Vicente
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: F
authors.initials: F
authors.lastname: da Silva
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-University Lorraine, Vandoeuvre, France.
authors.forename: S
authors.initials: S
authors.lastname: Heuraux
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: M E
authors.initials: ME
authors.lastname: Manso
authors.affiliation: Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany.
authors.forename: G D
authors.initials: GD
authors.lastname: Conway
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: C
authors.initials: C
authors.lastname: Silva