We have made the first interferomeric measurements of the wavelengths of the important ultraviolet diagnostic lines in the spectra C IV near 155nm and Si IV near 139nm with a vacuum ultraviolet Fourier transform spectrometer and high-current discharge sources. The wavelength uncertainties were reduced by one order of magnitude for the C IV lines and by two orders of magnitude for the Si IV line...

The Fe IX spectrum features two lines in the extreme ultraviolet whose ratio has been rated among best density diagnostics solar spectrum. One line is an E1-allowed intercombination transition at 244.909 Å, other E1-forbidden M2 241.739 Å. Employing a medium and high resolution spectrometer Livermore EBIT-I electron beam ion trap, we have observed pair laboratory for first time. Using CHIANTI m...

The Ultraviolet Coronagraph Spectrometer (UVCS) aboard the Solar and Heliospheric Observatory (SOHO) has revealed strong kinetic anisotropies and extremely large perpendicular temperatures of heavy ions in the extended solar corona. These observations have revived interest in the idea that the high-speed solar wind is heated and accelerated by the dissipation of ion cyclotron resonant Alfvén wa...

The heats of vaporization of the room temperature ionic liquids (RTILs) N-butyl-N-methylpyrrolidinium bistrifluorosulfonylimide, N-butyl-N-methylpyrrolidinium dicyanamide, and 1-butyl-3-methylimidazolium dicyanamide are determined using a heated effusive vapor source in conjunction with single photon ionization by a tunable vacuum ultraviolet synchrotron source. The relative gas phase ionic liq...