Alfv\'enic instabilities driven by runaways in fusion plasmas
  Runaway particles can be produced in plasmas with large electric fields. Here we address the possibility that such runaway ions and electrons excite Alfv\'enic instabilities. The magnetic perturbation induced by these modes can enhance the loss of runaways. This may have important implications for the runaway electron beam formation in tokamak disruptions. 
T F\"ul\"op and S Newton
physics.plasm-ph