Pressure Ionization and Line Merging in Strongly Coupled Plasmas Produced by 100-fs Laser PulsesDonald Umstadter Publications
Date of this Version5-18-1998
AbstractTime- and space-resolved extreme ultraviolet spectra of carbon plasmas, created with 100-fs laser pulses, are obtained with the novel technique of picosecond jitter-free streak-camera averaging. Spectroscopic diagnostics indicate electron densities and temperatures evolving from 1023 to 1021 cm-3 and 80 to 50 eV, respectively, implying less than one particle in a Debye sphere at early times. The emission reveals conditions of extreme pressure ionization and line merging. Comparisons of the experimental spectra with numerical simulations validate the use of the Inglis-Teller limit for line merging, and confirm that pressure ionization models based on the Debye-Huckel potential are inapplicable in such strongly coupled plasmas.
Citation InformationM. Nantel, G. Ma, S. Gu, C.Y. Côté, et al.. "Pressure Ionization and Line Merging in Strongly Coupled Plasmas Produced by 100-fs Laser Pulses" (1998)
Available at: http://works.bepress.com/donald_umstadter/81/