5 papers
Strong gradient neoclassical transport in the plateau regime
Silvia Trinczek, Felix I. Parra, Peter J. Catto +1
Strong gradient regions in tokamaks such as the pedestal or internal transport barriers are regions of reduced turbulence where neoclassical transport can play a dominant role. In…
Neoclassical transport and profile prediction in transport barriers
Silvia Trinczek, Felix I. Parra
Strong gradient regions in tokamaks, such as the pedestal or internal transport barriers, are regions of reduced turbulence where neoclassical transport can play a dominant role. H…
Beam-tracing and profile evolution for localised beams in inhomogeneous plasmas
Lewin B. S. Marsh, Felix I. Parra, Valerian H. Hall-Chen +1
We derive the beam tracing and profile evolution for the propagation of any localised beam with arbitrary profile through an inhomogeneous cold plasma. We recover standard Gaussian…
Conceptual study on using Doppler backscattering to measure magnetic pitch angle in tokamak plasmas
AK Yeoh, VH Hall-Chen, QT Pratt +8
We introduce a new approach to measure the magnetic pitch angle profile in tokamak plasmas with Doppler backscattering (DBS), a technique traditionally used for measuring flows and…
Beam focusing and consequences for Doppler Backscattering measurements
Juan Ruiz Ruiz, Felix I. Parra, Valerian H. Hall-Chen +5
The phenomenon of beam focusing of microwaves in a plasma near a turning-point caustic is discussed in the context of the analytical solution to the Gaussian beam-tracing equations…