Kunihiro Ogawa

1. Introduction One of the attractive solutions for the global energy crisis is the attainment of an ultimate energy source, i.e., magnetic confinement nuclear fusion [1]. Currently, the construction of ITER is progressing as an international joint project, and several startup companies propose to build fusion reactors [2]. We are now facing the start of the nuclear burning plasma era.

Abstract The energy transfer from wave to particle occurs in collisionless plasma through the interaction between particle and wave, associated with the deformation of ion velocity space from Maxwell-Boltzmann distribution. Here we show the direct observation of mass-dependent collisionless energy transfer via Landau and transit-time damping in a laboratory plasma.