Mapping of vacuum magnetic surfaces in H1 using techniques in tomography

Abstract

A novel approach is adopted in studying the error fields in the heliac facility, H1, of the Plasma Research Laboratory of the Australian National University by using a rotating multi-wire grid collector of the electron beam and a reconstruction technique developed in tomography known as Algebraic Reconstruction Technique (ART). Error fields in H1 are identified using maps of the vacuum magnetic surfaces from this technique that are compared with the maps generated from the HELIAC code (magnetic field tracing code).