Spectral catalog of Kr optical lines for the development of diagnostics for fusion plasmas

We made an inventory of krypton spectra over the wavelength range 3700-6000 Angstrom for the development of fusion plasma diagnostics. The measurement s were performed using a prism spectrometer on the Lawrence Livermore Natio nal Laboratory low energy electron beam ion trap (EBIT II). With the electr on energy from 150 to 17 000 eV, we recorded low ionization stages together with a number of magnetic dipole transitions from higher charge states. In total, we observed over 80 lines, of which about 70% of the lines have not been listed in the literature. This measurement established a baseline for future extension using spectrometers with very high resolution. As an exam ple, we present the Kr spectra from 3770 to 3900 Angstrom measured with a t ransmission grating spectrometer that has a resolving power of about 15 000 . Among the 41 lines observed, only six lines have been listed in the datab ases. (C) 2001 American Institute of Physics.