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Spectroscopy of heliumlike argon resonance and satellite lines for plasma temperature diagnostics

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Biedermann,  C.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

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Radtke,  R.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

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Biedermann, C., Radtke, R., & Fournier, K. B. (2002). Spectroscopy of heliumlike argon resonance and satellite lines for plasma temperature diagnostics. Physical Review E, 66: 066404.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-4170-8
Abstract
The n = 2 - 1 spectral emission pattern of heliumlike argon, together with the associated satellite emission originating from lithiumlike argon have been measured with high-resolution x-ray spectroscopy at the Berlin electron-beam ion trap. The observed line intensity across a wide range of excitation energies was weighted by an electron-energy distribution to analyze as a function of plasma temperature the line ratios between KLL dielectronic recombination satellites, in particular the j+z, j, and k satellites, and the w-resonance line. A good agreement between various theoretical models is found, supporting the method of line-ratio measurement as a temperature diagnostic for plasmas. A value for the so-called R-line ratio is determined and calculations with the HULLAC suite of codes predict it to be electron density independent over a wide range.