Lineshape spectroscopy with a very high resolution, very high signal-to-noise crystal spectrometer

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4952748· OSTI ID:22597970

Beiersdorfer, P.; Magee, E. W.; Brown, G. V.; Chen, H.; Emig, J. ^[1]; Hell, N. ^[1]; Bitter, M.; Hill, K. W. ^[2]; Allan, P.; Brown, C. R. D.; Hill, M. P.; Hoarty, D. J.; Hobbs, L. M. R.; James, S. F. ^[3]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
2. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
3. Directorate of Research and Applied Science, AWE plc, Reading RG7 4PR (United Kingdom)

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.

• OSTI ID: 22597970
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BRAGG REFLECTION
CALIBRATION
COMPARATIVE EVALUATIONS
CRYSTALS
ELECTROMAGNETIC PULSES
ELECTRON BEAMS
ELECTRON TEMPERATURE
HARD X RADIATION
IMAGES
ION TEMPERATURE
K SHELL
LASERS
MANIPULATORS
PHOTONS
RESOLUTION
SIGNALS
SPHERICAL CONFIGURATION
SULFUR
TARGET CHAMBERS
X-RAY SPECTROMETERS