RF-induced electric field and transport: experiments in non-fusion plasmas

The generation of radial electric fields through radiofrequency has been in vestigated in a toroidal magnetized plasma without rotational transform. By launching different kinds of electrostatic waves the plasma profiles were modified and sheared electric fields were generated. Direct observation of sheared E x B hows driven by fluctuations via Reynolds stress at the resona nce layer of ion Bernstein is reported. These experiments provide a new bri dge between experimental measurements and theoretical models in understandi ng the underlying physics of improved confinement regimes using RF in magne tically confined plasmas.