K-Alpha Emission Spectra From Non-Equilibrium Ionizing Plasmas.

Jacobs, V. L. ; Decaux, V. ; Beiersdorfer, P.

Technical Information Center Oak Ridge Tennessee

关键词: Emission spectra;    Autoionization;    Radiative transitions;    X-ray spectra;    Equilibrium plasmas;   

RP-ID  :  DE200515014530

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

K-alpha x-ray emission spectra from highly charged Fe ions have been theoretically predicted using a detailed and systematic spectral model. Account has been taken of the fundamental atomic radiative-emission processes associated with inner-shell electron collisional excitation and ionization, as well as dielectronic recombination. Particular emphasis has been directed at extreme non-equilibrium or transient-ionization conditions, which can occur in astrophysical and tokamak plasmas. Good agreement has been found in comparisons with spectral observations on the EBIT-II electron beam ion trap at the Lawrence Livermore National Laboratory. We have identified spectral features that can serve as diagnostics of the electron density, the line-formation mechanism, and the charge-state distribution.