GENERALIZED THEORY OF ION IMPACT BROADENING IN MAGNETIZED PLASMAS ANDITS APPLICATIONS FOR TOKAMAKS

A generalized semiclassical theory of ion impact broadening in high-te mperature, magnetized plasmas is developed that is free from a shortco ming of the standard semiclassical theories of Stark broadening, which were intrinsically divergent at small impact parameters. The converge nce of the present theory is achieved by taking into account, on equal footing, both the ''dynamic'' splitting of Stark sublevels, caused by one of the components of the ion microfield, and the Zeeman splitting . The results are applied to a novel spectroscopic method for local me asurements of an effective charge in tokamaks.