Application of spatially resolved high resolution crystal spectrometry to inertial confinement fusion plasmas

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4738651· OSTI ID:22093905

Hill, K. W.; Bitter, M.; Delgado-Aparacio, L.; Pablant, N. A. ^[1]; Beiersdorfer, P.; Schneider, M.; Widmann, K. ^[2]; Sanchez del Rio, M. ^[3]; Zhang, L. ^[4]

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1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
2. Physics Division, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
3. European Synchrotron Radiation Facility, BP 220, 38043-Grenoble Cedex (France)
4. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)

High resolution ({lambda}/{Delta}{lambda}{approx} 10 000) 1D imaging x-ray spectroscopy using a spherically bent crystal and a 2D hybrid pixel array detector is used world wide for Doppler measurements of ion-temperature and plasma flow-velocity profiles in magnetic confinement fusion plasmas. Meter sized plasmas are diagnosed with cm spatial resolution and 10 ms time resolution. This concept can also be used as a diagnostic of small sources, such as inertial confinement fusion plasmas and targets on x-ray light source beam lines, with spatial resolution of micrometers, as demonstrated by laboratory experiments using a 250-{mu}m {sup 55}Fe source, and by ray-tracing calculations. Throughput calculations agree with measurements, and predict detector counts in the range 10{sup -8}-10{sup -6} times source x-rays, depending on crystal reflectivity and spectrometer geometry. Results of the lab demonstrations, application of the technique to the National Ignition Facility (NIF), and predictions of performance on NIF will be presented.

• OSTI ID: 22093905
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 10; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CRYSTALS
DOPPLER EFFECT
ELECTRON TEMPERATURE
INERTIAL CONFINEMENT
ION TEMPERATURE
IRON 55
MAGNETIC CONFINEMENT
MAGNETOHYDRODYNAMICS
PERFORMANCE
PLASMA
PLASMA DIAGNOSTICS
REFLECTIVITY
SPATIAL RESOLUTION
SPECTROMETERS
TIME RESOLUTION
US NATIONAL IGNITION FACILITY
X RADIATION
X-RAY SOURCES
X-RAY SPECTROSCOPY