Comparison of observed and theoretical Fe L emission from CIE plasmas

Carpenter, M ; Beiersdorfer, P ; Brown, G V ; Chen, H C ; Gu, M F ; Jernigan, J G

Lawrence Livermore National Laboratory

关键词: Lawrence Livermore National Laboratory;    Spectra;    Photons;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Electron Beams;   

DOI  :  10.2172/924171
RP-ID  :  UCRL-SR-236551
RP-ID  :  W-7405-ENG-48
RP-ID  :  924171

美国|英语

来源: UNT Digital Library

【 摘 要 】

We analyze data from the Lawrence Livermore National Lab (LLNL) Electron Beam Ion Trap (EBIT) that simulates a CIE plasma by sweeping the electron beam to approximate a Maxwellian velocity distribution. These results are compared to spectra of confirmed astronomical CIE plasmas (e.g. outer regions of x-ray clusters) observed by XMM/RGS. We utilize the Photon Clean Method (PCM) to quantify these spectra (EBIT and XMM/RGS) in the form of ratios of Fe L lines in the emission complex near 1 keV. The variances of line fluxes are measured with bootstrap methods (Efron 1979). Both of these observations are further compared with theoretical predictions of Fe L line fluxes from APED and similar atomic databases.