VUV-Spectroscopy of Multiply Charged Ion Source-Plasmas

The ion charge state distribution (CSD) in a multiply charged ion source- (MCIS-) plasma can be determined from the spectrum of resonance transitions of excited neutral and ionised plasma particles. The principle of this method, which for noble gas ions involves vacuum-ultraviolet spectroscopy, is described and first measurements for a DUOPLASMATRON-ion source operated with He and Ar are presented.