Studying Radiation from Z-pinch Wire Array and X-Pinch Plasmas: K-shell Mg to M-shell Mo

Safronova, A.S.; Kantsyrev, V.L.; Safronova, U. I.; Esaulov, A. A.; Yilmaz, M.F.; Ouart, N. D.; Shrestha, I.; Williamson, K.; Osborne, G. C.; Wilcox, P. G.; Weller, M. E.; Shlyaptseva, V. V.; Coverdale, C. A.; Ampleford, D. J.; LePell, P.D.; Deeney, C.

doi:10.1063/1.3241193

Cited by 5 publications

(1 citation statement)

References 12 publications

(20 reference statements)

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“…The first spectrometer was a convex spectrometer with a potassium hydrogen phthalate (KAP) crystal. This spectrometer has a spectral resolution of about 300 and has been employed before in Z-pinch experiments [24,25]. This survey spectrometer covered a broad spectral range from 7 to 17.5 Å.…”

Section: Methodsmentioning

confidence: 99%

Analysis of Mg spectral features produced by irradiations of laser pulses with different contrast and pulse durations

Stafford

Safronova

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

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Experiments performed at the Leopard Laser Facility at the Nevada Terawatt Facility of the University of Nevada, Reno have produced K-shell Mg spectra with complex satellite features. K-shell Mg spectra were collected from experiments comprised of three different conditions related to laser pulse and contrast. Two spectrometers were fielded: a survey convex spectrometer with a potassium hydrogen phthalate (KAP) crystal (R ∼ 300) and a high resolution focusing spectrometer with spatial resolution using a spherically bent mica crystal (R ∼ 3000). These spectra included dielectronic satellite (DS) lines that were investigated using the quasi-relativistic many-body perturbation theory (MZ) code for previously identified transitions from autoionizing 2lnl states in He-like Mg and new transitions involving autoionizing 1s3lnl states in Li-like Mg and 1s3l3l 3l in Be-like Mg calculated using the Hartree-Fock-relativistic method (COWAN code). Radiative and non-radiative data are combined to obtain branching ratios, intensities and effective emission rate coefficients of DS lines. Synthetic spectra were matched to experimental data to identify strong satellite structures to the Heβ (7.8507 Å) and Lyα (8.4192 Å) resonance transitions.

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Section: Methodsmentioning

confidence: 99%

Analysis of Mg spectral features produced by irradiations of laser pulses with different contrast and pulse durations

Stafford

Safronova

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

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Anisotropy of radiation emitted from planar wire arrays

et al. 2013

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International audienceThe planar wire array (PWA) is a promising load for new multi-source inertial confinement fusion (ICF) hohlraums [B. Jones et al. Phys. Rev. Lett. 104 125001 (2010)]. The hohlraum radiation symmetry is an important issue for ICF. It was found that extreme ultraviolet and sub-keV photon emission from PWAs may have considerable anisotropy in the load azimuthal plane. This experimental result is obtained on the UNR 11.7 MA Zebra generator. The time-dependent anisotropy effect is detected. This feature is studied in 2D numerical simulations and can be explained by initial anisotropy of implosion of those non-cylindrical loads radiating essentially as surface sources in sub-keV quanta and also by radiation absorption in cold magnetized plasma tails forming in the direction of magnetic compression

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Producing Kiloelectronvolt L-Shell Plasmas on Zebra at UNR

Safronova

Kantsyrev

Esaulov

et al. 2012

IEEE Trans. Plasma Sci.

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International audienceExperiments with various wire loads from mid-atomic-number wires, which were performed on the university-scale 1-MA Zebra generator at the University of Nevada, Reno, during the last few years, are analyzed to assess the highest electron temperature reached. In particular, the results from experiments with planar wire arrays (PWAs) were considered. Load materials from mid-atomic-number such as stainless steel, Alumel, Cu, brass, Mo, and up to Ag were used to generate L-shell plasmas and to study plasma parameters. Though the full diagnostic set was utilized, the main focus was on X-ray spectroscopic data and on the non-local thermodynamic equilibrium kinetic modeling. As a result, the scaling of the maximum Te with the load material atomic number is presented for the first time in the range from Fe to Ag for L-shell plasmas from PWAs. The highest values of the electron temperature in L-shell plasmas, which are estimated from the modeling, were from both Ag PWAs and X-pinches. This work is important for the development of efficient X-ray radiators on university-scale Z-pinch generators

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Studying Radiation from Z-pinch Wire Array and X-Pinch Plasmas: K-shell Mg to M-shell Mo

Cited by 5 publications

References 12 publications

Analysis of Mg spectral features produced by irradiations of laser pulses with different contrast and pulse durations

Analysis of Mg spectral features produced by irradiations of laser pulses with different contrast and pulse durations

Anisotropy of radiation emitted from planar wire arrays

Producing Kiloelectronvolt L-Shell Plasmas on Zebra at UNR

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