Extreme ultraviolet spectroscopy and modeling of Cu on the SSPX Spheromak and laser plasma 'Sparky'

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

DOI:https://doi.org/10.1063/1.4727916· OSTI ID:22093887

Weller, M. E.; Safronova, A. S.; Kantsyrev, V. L.; Safronova, U. I.; Petkov, E. E.; Wilcox, P. G.; Osborne, G. C. ^[1]; Clementson, J.; Beiersdorfer, P. ^[2]

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1. University of Nevada, Reno, Nevada 89557 (United States)
2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

Impurities play a critical role in magnetic fusion research. In large quantities, impurities can cool and dilute plasma creating problems for achieving ignition and burn; however in smaller amounts the impurities could provide valuable information about several plasma parameters through the use of spectroscopy. Many impurity ions radiate within the extreme ultraviolet (EUV) range. Here, we report on spectra from the silver flat field spectrometer, which was implemented at the Sustained Spheromak Physics experiment (SSPX) to monitor ion impurity emissions. The chamber within the SSPX was made of Cu, which makes M-shell Cu a prominent impurity signature. The Spect3D spectral analysis code was utilized to identify spectral features in the range of 115-315 A and to more fully understand the plasma conditions. A second set of experiments was carried out on the compact laser-plasma x-ray/EUV facility 'Sparky' at UNR, with Cu flat targets used. The EUV spectra were recorded between 40-300 A and compared with results from SSPX.

• OSTI ID: 22093887
• 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

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EMISSION
EXTREME ULTRAVIOLET RADIATION
IONS
LASER RADIATION
M SHELL
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
PLASMA IMPURITIES
SILVER
SIMULATION
SPECTRA
SPECTROMETERS
SPECTROSCOPY
SSPX DEVICE
X RADIATION