Grazing-incidence measurements of L-shell line emission from highly charged Fe in the soft x-ray region

S. B. Utter; G. V. Brown; P. BeiersdorferE. J. ClothiauxN. K. Podder

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Grazing-incidence measurements of L-shell line emission from highly charged Fe in the soft x-ray region

机译：Grazing-incidence measurements of L-shell line emission from highly charged Fe in the soft x-ray region

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Line emission from highly charged ions in the soft x-ray region represents an important diagnostic for high-temperature plasma. The wavelength region of 10-30 A is occupied by lines from the K-shell transitions in N through Ne and L-shell transitions in Ti through Ni Crystal spectrometers have previously been used to investigate Fe line radiation under well controlled conditions using the LLNL electron beam ion trap facility in this wavelength region. To complement this work we have instituted a grazing-incidence spectrometer with a variable line-spaced, concave grating and a flat field of focus which is suited for a multichannel detector. Simultaneous observations of the Ne-like Fe~(16+) n=3->2 transitions were made with this instrument and a flat-crystal spectrometer in order to establish the linear polarization of the Fe XVII lines. We present a description of the grating spectrometer and discuss its performance in comparison with Rowland circle based grazing incidence instruments.

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《Review of Scientific Instruments》 |1999年第2期|284-287|共4页
作者
S. B. Utter; G. V. Brown; P. BeiersdorferE. J. ClothiauxN. K. Podder;
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Department of Physics and Space Technology, lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Physics, Auburn University, Auburn, ALabama 36830;

Department of Physics and Space Technology, Lawrence Livermore National Laboratory, Livermore, California 94551;

Department of Physics, Auburn University, Auburn, ALabama 36830;

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Grazing-incidence measurements of L-shell line emission from highly charged Fe in the soft x-ray region

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