Plasma rotation due to fluctuations caused by instabilities

An expression for the ion flow velocity due to fluctuating electric and mag netic fields is presented for an axisymmetric toroidal plasma. When the sou rce term due to fluctuations can be approximated as a parallel momentum sou rce, this expression reduces to that obtained by the moment approach in the conventional neoclassical transport theory. As an application, the plasma rotation due to the slab ion-temperature-gradient mode is estimated. (C) 20 00 American Institute of Physics. [S1070-664X(00)03511-4].