Introducing minimum Fisher regularisation tomography to AXUV and soft x-ray diagnostic systems of the COMPASS tokamak

J. Mlynar, M. Imrisek, V. Weinzettl, M. Odstrcil, J. Havlicek, F. Janky, B. Alper, A. Murari

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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. © 2012 Euratom.
Original languageEnglish
Article number10E531
Pages (from-to)-
JournalReview of Scientific Instruments
Volume83
Issue number10
DOIs
Publication statusPublished - Oct 2012
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Mlynar, J., Imrisek, M., Weinzettl, V., Odstrcil, M., Havlicek, J., Janky, F., ... Murari, A. (2012). Introducing minimum Fisher regularisation tomography to AXUV and soft x-ray diagnostic systems of the COMPASS tokamak. Review of Scientific Instruments, 83(10), -. [10E531]. https://doi.org/10.1063/1.4738648