Modification of microturbulence during impurity injection on text

Abstract

A multichannel, far-infrared (FIR) laser scattering system is used to study the temporal development of the power spectra of low frequency microturbulence in the TEXT tokamak. The single shot measurement capability has revealed significant modifications in the spectra during laser ablative injection of small quantities of scandium into the plasma. The present paper reports these observations in detail and discusses their relevance to transport phenomena in fusion plasmas.