title: Lineshape spectroscopy with a very high resolution, very high signal-to-noise crystal spectrometer.
abstract: We have developed a high-resolution x-ray spectrometer for measuring the shapes of spectral lines produced from laser-irradiated targets on the Orion laser facility. The instrument utilizes a spherically bent crystal geometry to spatially focus and spectrally analyze photons from foil or microdot targets. The high photon collection efficiency resulting from its imaging properties allows the instrument to be mounted outside the Orion chamber, where it is far less sensitive to particles, hard x-rays, or electromagnetic pulses than instruments housed close to the target chamber center in ten-inch manipulators. Moreover, Bragg angles above 50° are possible, which provide greatly improved spectral resolution compared to radially viewing, near grazing-incidence crystal spectrometers. These properties make the new instrument an ideal lineshape diagnostic for determining plasma temperature and density. We describe its calibration on the Livermore electron beam ion trap facility and present spectral data of the K-shell emission from highly charged sulfur produced by long-pulse as well as short-pulse beams on the Orion laser in the United Kingdom.
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: P
authors.initials: P
authors.lastname: Beiersdorfer
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: E W
authors.initials: EW
authors.lastname: Magee
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: G V
authors.initials: GV
authors.lastname: Brown
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: H
authors.initials: H
authors.lastname: Chen
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: J
authors.initials: J
authors.lastname: Emig
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: N
authors.initials: N
authors.lastname: Hell
authors.affiliation: Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA.
authors.forename: M
authors.initials: M
authors.lastname: Bitter
authors.affiliation: Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA.
authors.forename: K W
authors.initials: KW
authors.lastname: Hill
authors.affiliation: Directorate of Research and Applied Science, AWE plc, Reading RG7 4PR, United Kingdom.
authors.forename: P
authors.initials: P
authors.lastname: Allan
authors.affiliation: Directorate of Research and Applied Science, AWE plc, Reading RG7 4PR, United Kingdom.
authors.forename: C R D
authors.initials: CR
authors.lastname: Brown
authors.affiliation: Directorate of Research and Applied Science, AWE plc, Reading RG7 4PR, United Kingdom.
authors.forename: M P
authors.initials: MP
authors.lastname: Hill
authors.affiliation: Directorate of Research and Applied Science, AWE plc, Reading RG7 4PR, United Kingdom.
authors.forename: D J
authors.initials: DJ
authors.lastname: Hoarty
authors.affiliation: Directorate of Research and Applied Science, AWE plc, Reading RG7 4PR, United Kingdom.
authors.forename: L M R
authors.initials: LM
authors.lastname: Hobbs
authors.affiliation: Directorate of Research and Applied Science, AWE plc, Reading RG7 4PR, United Kingdom.
authors.forename: S F
authors.initials: SF
authors.lastname: James