Tokamak-generated tungsten radiation identified in Agi isoelectronic sequence (W xxviii)

Abstract

A new interpretation of the tungsten spectrum observed in 1.5-keV tokamak plasmas at Oak Ridge (the ORMAK) and Princeton (the PLT) is given. An isoelectronic extrapolation of the Agi sequence from newly observed data through Hoxxi strongly suggests that the tokamak radiation belongs to the transition array $4{d}^{10}4f\ensuremath{-}4{d}^{9}4{f}^{2}$ of Wxxviii. This is well supported by comparison with a calculation of the spectrum. An earlier interpretation incorrectly attributed the radiation to a superposition of complex transition arrays from much higher ionization stages.