title: Full toroidal imaging of non-axisymmetric plasma material interaction in the National Spherical Torus Experiment divertor.
abstract: A pair of two dimensional fast cameras with a wide angle view (allowing a full radial and toroidal coverage of the lower divertor) was installed in the National Spherical Torus Experiment in order to monitor non-axisymmetric effects. A custom polar remapping procedure and an absolute photometric calibration enabled the easier visualization and quantitative analysis of non-axisymmetric plasma material interaction (e.g., strike point splitting due to application of 3D fields and effects of toroidally asymmetric plasma facing components).
authors.affiliation: Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA. fscotti@pppl.gov
authors.forename: Filippo
authors.initials: F
authors.lastname: Scotti
authors.forename: A L
authors.initials: AL
authors.lastname: Roquemore
authors.forename: V A
authors.initials: VA
authors.lastname: Soukhanovskii