UKAEA Papers

"Velocity space evolution of a minority energetic electron population undergoing the anomalous Doppler instability"

• W. N. Lai
• S. C. Chapman
• R. O. Dendy

The kinetic evolution in velocity space of a minority suprathermal electron population that is undergoing the anomalous Doppler instability (ADI) is investigated using the results from fully nonlinear numerical simulations that self-consistently evolve particles and fields in a plasma. Electron trajectories in phase space during different stages of…

"Electron Kinetics Inferred from Observations of Microwave Bursts During Edge Localized Modes in the Mega-Amp Spherical Tokamak"

• S. J. Freethy
• K. G. McClements
• S. C. Chapman
• R. O. Dendy
• W. N. Lai
• S. J. P. Pamela
• V. F. Shevchenko
• R. G. L. Vann

Recent measurements of microwave and x-ray emission during edge localized mode (ELM) activity in tokamak plasmas provide a fresh perspective on ELM physics. It is evident that electron kinetics, which are not incorporated in standard (fluid) models for the instability that drives ELMs, play a key role in the new observations. These effects should b…

"Self-consistent nonlinear kinetic simulations of the anomalous Doppler instability of suprathermal electrons in plasmas"

• W. N. Lai
• S. C. Chapman
• R. O. Dendy