"Unveiling the Impact of Collisions on Ion Surfing in Fusion Experiments and Beyond"
Collisions between fast ions and plasma waves in fusion experiments can affect the efficiency of energy transfer and the behavior of particles. Different types of collisions, such as diffusive scattering and convective drag, compete to determine the resonance between fast ions and waves. Researchers have used mathematical calculations and computer simulations to understand these interactions and develop models for sustaining fusion reactions. This understanding can also be applied to astrophysical research and gravitational interactions in galaxies. The study reveals that drag collisions can shift the speed at which resonance occurs, creating new resonances and extending the range of interaction. The derived resonance function provides insights into wave-particle interactions in plasmas and can be used to improve simulations for developing commercial fusion power plants.