Abstract
The discharge parameters of a low-inductance, high-current vacuum spark were optimized to produce a small “point” plasma with temperatures of 35 keV and densities higher than 1020cm−3. Using two Bragg-crystal spectrometers the time resolved x-ray emission was studied. Lines from helium-like and hyrogen-like ions of the elements titanium, iron, copper, and molybdenum were observed and compared with theoretical predictions. Satellite lines to the Lyman-α transition up to molybdenum are identified as radiative transitions from autoionizing levels of the doubly excited helium-like ionization stages.
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Work supported by the US Atomic Energy Commission.
The authors would like to express their appreciation to H. R. Griem for valuable discussions, and to K. Aashamar for communicating theoretical wavelengths for the (1s2p)3 P-(2p 2)3 P transitions in helium-like ions in advance of publication.
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Turechek, J.J., Kunze, H.J. Time-resolved spectroscopic observations of a high-temperature, high-density plasma in a vacuum spark. Z Physik A 273, 111–121 (1975). https://doi.org/10.1007/BF01435830
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DOI: https://doi.org/10.1007/BF01435830