Simulation and analysis of radiation from runaway electrons
Licentiatavhandling, 2019
This thesis focuses on geometric effects observed in the detected radiation when magnetic field inhomogeneities and detector properties are
taken into account, something which previous studies have neglected. The dependence of the observed radiation on magnetic field geometry, detector properties and runaway parameters is characterised, and it is explained how geometric effects limit the otherwise monotonic growth of the diagnostic response function with the runaway pitch angle. The synthetic diagnostic model is applied to experiments in the Alcator C-Mod and the DIII-D tokamaks and is used to validate kinetic theory predictions of the electron distribution function. It is found that the kinetic model agrees well in certain scenarios and fails in others. In the scenarios where it fails, the synthetic diagnostic model suggests that a mechanism causing a larger spread in pitch angle may be missing from the kinetic model.
tokamak
runaway electrons
synthetic diagnostics
fusion
synchrotron radiation
plasma physics
bremsstrahlung
Författare
Mathias Hoppe
Chalmers, Fysik, Subatomär fysik och plasmafysik
SOFT: A synthetic synchrotron diagnostic for runaway electrons
Nuclear Fusion,;Vol. 58(2018)p. 026032-
Artikel i vetenskaplig tidskrift
Measurements of runaway electron synchrotron spectra at high magnetic fields in Alcator C-Mod
Nuclear Fusion,;Vol. 58(2018)
Artikel i vetenskaplig tidskrift
Interpretation of runaway electron synchrotron and bremsstrahlung images
Nuclear Fusion,;Vol. 58(2018)
Artikel i vetenskaplig tidskrift
Spatiotemporal evolution of runaway electrons from synchrotron images in Alcator C-Mod
Plasma Physics and Controlled Fusion,;Vol. 60(2018)
Artikel i vetenskaplig tidskrift
Skena och skina
Europeiska kommissionen (EU) (EC/H2020/647121), 2015-10-01 -- 2020-09-30.
Skenande elektroner i fusionsplasmor
Vetenskapsrådet (VR) (2014-5510), 2015-01-01 -- 2018-12-31.
Drivkrafter
Hållbar utveckling
Styrkeområden
Energi
Fundament
Grundläggande vetenskaper
Ämneskategorier
Annan fysik
Teoretisk kemi
Fusion, plasma och rymdfysik
CTH-NT - Chalmers University of Technology, Nuclear Engineering: 337
Utgivare
Chalmers
PJ, Origo, Fysikgården 1
Opponent: Dr. Basilio Esposito, ENEA, Italy