Spectrum lines of Kr xxviii–Kr xxxiv observed in the JET tokamak

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Abstract
Spectra of highly ionized krypton in the wavelength range 40–335 Å have been observed in the Joint European Torus tokamak plasmas, into which small amounts of Kr were admitted. Among the observed lines are all the strong resonance lines within the n=2 shell from fluorinelike to lithiumlike krypton, as well as all the stronger magnetic dipole lines that are expected to occur in these spectra. The wavelengths of the krypton lines were determined using known wavelengths of lines of elements intrinsic in the plasma, mostly carbon and nickel lines, as standards. In most cases of stronger lines, the accuracy is estimated to ±0.025 Å, or better.