Grazing-incidence measurements of {ital L}-shell line emission from highly charged Fe in the soft x-ray region
- Department of Physics and Space Technology, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
- Department of Physics, Auburn University, Auburn, Alabama 36830 (United States)
Line emission from highly charged ions in the soft x-ray region represents an important diagnostic for high-temperature plasmas. The wavelength region of 10{endash}30 {Angstrom} is occupied by lines from the {ital K}-shell transitions in N through Ne and {ital 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{sup 16+}n=3{r_arrow}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. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 303207
- Report Number(s):
- CONF-980605-; ISSN 0034-6748; TRN: 99:002555
- Journal Information:
- Review of Scientific Instruments, Vol. 70, Issue 1; Conference: 12. topical conference on high-temperature plasma diagnostics, Princeton, NJ (United States), 7-11 Jun 1998; Other Information: PBD: Jan 1999
- Country of Publication:
- United States
- Language:
- English
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