DETERMINATION OF THE ELECTRIC FIELD VECTOR TWO DIMENSIONAL DISTRIBUTION INSIDE A HOLLOW CATHODE USING THE LASER STARK SPECTROSCOPY OF NaK M. P. ALBERTA et J. DEROUARDJ. Phys. IV France, 01 C7 (1991) C7-547-C7-550DOI: https://doi.org/10.1051/jp4:19917143