High resolution absorption spectroscopy of exploding wire plasmas using an x-pinch x-ray source and spherically bent crystal
- Laboratory of Plasma Studies, Cornell University, 439 Rhodes Hall, Ithaca, New York 14853 (United States)
- Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
We present here the use of absorption spectroscopy of the continuum radiation from x-pinch-produced point x-ray sources as a diagnostic to investigate the properties of aluminum plasmas created by pulsed power machines. This technique is being developed to determine the charge state, temperature, and density as a function of time and space under conditions that are inaccessible to x-ray emission spectroscopic diagnostics. The apparatus and its characterization are described, and the spectrometer dispersion, magnification, and resolution are calculated and compared with experimental results. Spectral resolution of about 5000 and spatial resolution of about 20 {mu}m are demonstrated. This spectral resolution is the highest available to date in an absorption experiment. The beneficial properties of the x-pinch x-ray source as the backlighter for this diagnostic are the small source size (<5 {mu}m), smooth continuum radiation, and short pulse duration (<0.1 ns). Results from a closely spaced (1 mm) exploding wire pair are shown and the general features are discussed.
- OSTI ID:
- 22062350
- Journal Information:
- Review of Scientific Instruments, Vol. 82, Issue 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION SPECTROSCOPY
ALUMINIUM
CHARGE STATES
CRYSTALS
DENSITY
ELECTRON TEMPERATURE
EXPLODING WIRES
PHOTON EMISSION
PINCH EFFECT
PLASMA
PULSES
SPACE DEPENDENCE
SPATIAL RESOLUTION
TIME DEPENDENCE
X-RAY EMISSION ANALYSIS
X-RAY SOURCES