title: Introducing minimum Fisher regularisation tomography to AXUV and soft x-ray             diagnostic systems of the COMPASS tokamak.
abstract: The contribution focuses on plasma tomography via the minimum Fisher             regularisation (MFR) algorithm applied on data from the recently commissioned             tomographic diagnostics on the COMPASS tokamak. The MFR expertise is based on previous             applications at Joint European Torus (JET), as exemplified in a new case study of the             plasma position analyses based on JET soft x-ray (SXR) tomographic reconstruction.             Subsequent application of the MFR algorithm on COMPASS data from cameras with absolute             extreme ultraviolet (AXUV) photodiodes disclosed a peaked radiating region near the             limiter. Moreover, its time evolution indicates transient plasma edge cooling following             a radial plasma shift. In the SXR data, MFR demonstrated that a high resolution plasma             positioning independent of the magnetic diagnostics would be possible provided that a             proper calibration of the cameras on an x-ray source is undertaken.
authors.affiliation: Institute of Plasma Physics AS CR, Association EURATOM-IPP.CR, Prague, Czech Republic. mlynar@ipp.cas.cz
authors.forename: J
authors.initials: J
authors.lastname: Mlynar
authors.forename: M
authors.initials: M
authors.lastname: Imrisek
authors.forename: V
authors.initials: V
authors.lastname: Weinzettl
authors.forename: M
authors.initials: M
authors.lastname: Odstrcil
authors.forename: J
authors.initials: J
authors.lastname: Havlicek
authors.forename: F
authors.initials: F
authors.lastname: Janky
authors.forename: B
authors.initials: B
authors.lastname: Alper
authors.forename: A
authors.initials: A
authors.lastname: Murari