Projects per year
Non-Maxwellian electron distribution functions give rise to a rich variety of kinetic instabilities, such as streaming instability, Weibel instability, and electrostatic and electromagnetic cyclotron instabilities. Electron ring-like distributions are ubiquitous in space plasmas and also occur in mirror-confined plasma where the loss-cone cuts a 'hole' in the distribution function. We report recent observations and simulations of instabilities in mirror-confined ECR discharge plasma , where excitation on harmonics and half-harmonics of the electron cyclotron frequency have been observed. The relevance to space plasma are also discussed where similar observations by satellites are common [2,3]. Theory and simulations show that electrostatic instabilities take place where two electron Bernstein modes merge . Electromagnetic Vlasov simulations also show the coupling between electrostatic and electromagnetic electron Bernstein modes leading to instabilities near cyclotron harmonics.
|Publication status||Published - 4 Dec 2019|
|Event||5th Microwaves in Plasmas and Beams Workshop - University of Strathclyde, Glasgow, United Kingdom|
Duration: 4 Dec 2019 → 5 Dec 2019
|Conference||5th Microwaves in Plasmas and Beams Workshop|
|Period||4/12/19 → 5/12/19|
- kinetic instabilities
- plasma physics
- space plasmas
1/08/17 → 31/07/20
Eliasson, B., Viktorov, M., Golubev, S., Speirs, D. C., Mansfeld, D., Phelps, A. D. R., Bingham, R., Cross, A. W., & Ronald, K. (2019). Experiment and simulations of kinetic instabilities in mirror-confined ECR discharge plasma. Abstract from 5th Microwaves in Plasmas and Beams Workshop, Glasgow, United Kingdom.