Electron cyclotron emissions from mirror trapped plasma: observations and modelling results

Bengt Eliasson, David Speirs, Kevin Ronald, Alan Phelps, Mikhail Viktorov, D. Mansfeld

Research output: Contribution to conferencePosterpeer-review


We report observations of electromagnetic emissions at electron cyclotron harmonics in a mirror-confined electron cyclotron resonance (ECR) plasma. The present research has achieved a new understanding of electron cyclotron instabilities by comparing measurements of emissions from a well-diagnosed laboratory plasma, with the predictions of analytical theory supported by Vlasov simulations. A notable success of this work is the revelation of the subtle effects that the presence of multi-component electron distribution functions involving a warm and ring-distributed1 200-400 eV mirror-confined population of electrons and a much colder 1 eV component have on the excitation of electron cyclotron instabilities. This new understanding resulting from the research reported here is likely to have a significant impact on the many areas where electron cyclotron instabilities are of fundamental importance, including astrophysical plasmas2, near-Earth solar-terrestrial plasmas3, laboratory tokamak and stellarator fusion plasmas and electron cyclotron resonance sources.
Original languageEnglish
Number of pages1
Publication statusPublished - 10 Dec 2020
Event47th IEEE International Conference on Plasma Sciences - Singapore, Singapore, Singapore
Duration: 6 Dec 202010 Dec 2020
Conference number: 47


Conference47th IEEE International Conference on Plasma Sciences
Abbreviated titleICOPS
Internet address


  • cyclotron emissions
  • plasma


Dive into the research topics of 'Electron cyclotron emissions from mirror trapped plasma: observations and modelling results'. Together they form a unique fingerprint.

Cite this