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Title: Turbulent stagnation in a Z -pinch plasma

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1417064
Grant/Contract Number:
NA0001836; 67350-9960
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 97; Journal Issue: 1; Related Information: CHORUS Timestamp: 2018-01-16 10:09:40; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Kroupp, E., Stambulchik, E., Starobinets, A., Osin, D., Fisher, V. I., Alumot, D., Maron, Y., Davidovits, S., Fisch, N. J., and Fruchtman, A. Turbulent stagnation in a Z -pinch plasma. United States: N. p., 2018. Web. doi:10.1103/PhysRevE.97.013202.
Kroupp, E., Stambulchik, E., Starobinets, A., Osin, D., Fisher, V. I., Alumot, D., Maron, Y., Davidovits, S., Fisch, N. J., & Fruchtman, A. Turbulent stagnation in a Z -pinch plasma. United States. doi:10.1103/PhysRevE.97.013202.
Kroupp, E., Stambulchik, E., Starobinets, A., Osin, D., Fisher, V. I., Alumot, D., Maron, Y., Davidovits, S., Fisch, N. J., and Fruchtman, A. 2018. "Turbulent stagnation in a Z -pinch plasma". United States. doi:10.1103/PhysRevE.97.013202.
@article{osti_1417064,
title = {Turbulent stagnation in a Z -pinch plasma},
author = {Kroupp, E. and Stambulchik, E. and Starobinets, A. and Osin, D. and Fisher, V. I. and Alumot, D. and Maron, Y. and Davidovits, S. and Fisch, N. J. and Fruchtman, A.},
abstractNote = {},
doi = {10.1103/PhysRevE.97.013202},
journal = {Physical Review E},
number = 1,
volume = 97,
place = {United States},
year = 2018,
month = 1
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on January 16, 2019
Publisher's Accepted Manuscript

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  • In order to benchmark and improve current 2D radiation magnetohydrodynamic (MHD) models of Z-pinch plasmas, we have performed experiments which characterize the plasma conditions at stagnation. In the experiments the SATURN pulsed power facility at Sandia National Laboratory was used to create an imploding Ar-Ne plasma. An absolutely calibrated, high resolution space- and time-resolving Johann crystal spectrometer was used to infer the electron temperature T{sub e} from the slope of the hydrogenlike Ne free-bound continuum, and the ion density n{sub i} from the Stark broadening of the Ar heliumlike Rydberg series. 2D electron temperature profiles of the plasma are obtainedmore » from a set of imaging crystals also focused on the Ne free-bound continuum. We shot two types of gas nozzles in the experiment, annular and uniform fill, which varies the amount of mass in the plasma. 2D local thermodynamic equilibrium (LTE) and non-LTE MHD models predict a radiating region denser and cooler than measured. {copyright} {ital 1997 American Institute of Physics.}« less
  • The density, temperature, and radiation coupling are investigated in strongly radiating Ar-Ne Z -pinch plasmas at stagnation using a novel high resolution space- and time-resolving x-ray spectrometer. One- and two-dimensional electron temperature profiles are obtained from the slope of the Ne recombination continuum. The electron density and ion temperature are determined from comparisons of the heliumlike Ar Rydberg series with detailed line-profile calculations. 2D nonlocal thermodynamic equilibrium calculations predict a radiating region denser and cooler than measured. {copyright} {ital 1998} {ital The American Physical Society}
  • A goal of pulsed-power technology is the development of an intense, megajoule level source of soft x rays for use in high-energy density physics experiments. Experimental facilities, theoretical concepts, computational tools, and diagnostics that have been developed since 1980 place pulsed power at the threshold of performing experiments of great interest to the applied physics community. In this paper the {open_quotes}Flying Radiation Case{close_quotes} approach will be presented and its predicted performance on Sandia National Laboratory{close_quote}s Z-Machine [M. K. Matzen, Phys. Plasmas {bold 4}, 1519 (1997)] will be described. The effects of instability growth in the plasma during the implosion, itsmore » reassembly on a central cushion, and the plasma interactions with shaped electrodes are considered. {copyright} {ital 1998 American Institute of Physics.}« less
  • The ion-kinetic energy throughout K emission in a stagnating plasma was determined from the Doppler contribution to the shapes of optically thin lines. X-ray spectroscopy with a remarkably high spectral resolution, together with simultaneous imaging along the pinch, was employed. Over the emission period, a drop of the ion-kinetic energy down to the electron thermal energy was seen. Axially resolved time-dependent electron-density measurements and absolute intensities of line and continuum allowed for investigating, for the first time, each segment of the pinch, the balance between the ion-kinetic energy at the stagnating plasma, and the total radiation emitted. Within the experimentalmore » uncertainties, the ion-kinetic energy is shown to account for the total radiation.« less