Electron-ion collisional rate coefficients from time-dependent plasmas

Details Electron-ion collisional rate coefficients from time-dependent plasmas Electron-ion collisional rate coefficients from time-dependent plasmas

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jqsrt..40..403g&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 40, Sept. 1988, p. 403-420. DOE-NSF-supported

Physics

13

Collision Rates, Electron Scattering, Electron-Ion Recombination, Ionic Collisions, Nonuniform Plasmas, Ionization Coefficients, Recombination Coefficient, Thomson Scattering, Time Dependence

Scientific paper

Measurements of effective collisional electron-ion rate coefficients for ionization, dielectronic recombination, and excitation, performed using methods of quantitative spectroscopy, are reviewed. Plasma parameters are determined using independent methods, mostly Thomson scattering of laser radiation for the electron temperature and density. A large number of ionization rate coefficients have been obtained with an expected accuracy approaching 30 percent. For dielectronic recombination, the number of measurements is much smaller and the expected accuracy is typically about a factor of 2. For both processes, the highest ionic charge for which measurements based on time-dependent radiation have been reported is about 30. For excitation, the number of rate coefficients obtained is intermediate to those for ionization and dielectronic recombination. The expected accuracy is often limited by errors in the intensity calibration and in the determination of impurity densities. The highest charge is 16 for such measurements of excitation rates.

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