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

Abstract

University-scale Z-pinch generators are able to produce plasmas with a broad range of temperatures, densities, and opacity properties depending on the type, size, and mass of wire-array loads and wire materials. Experiments with very different Z-pinch loads were performed on the 1 MA Zebra generator at UNR and analyzed during the last five years including Single and Nested Cylindrical, Conical, and various types of Planar Wire Arrays. It is shown that such wire arrays are good sources of x-rays and that they produce significant radiation yield (up to 25 kJ) on a ns time scale, and generate bright spots of sub-mm size. They can be used for studying radiative properties of moderate density (between 10{sup 18} cm{sup -3} and 5x10{sup 21} cm{sup -3}) and temperature (<=1.5 keV) plasmas. In addition, X-pinches generated higher density (>10{sup 22} cm{sup -3}) and temperature (>2 keV) plasmas on scales as small as a few mum to several mm in size. Wire materials with a broad range of nuclear charge Z were used, ranging from low-Z, such as alloyed Al wires with varying concentrations of Mg, to mid-Z, such as Stainless steel, Cu, Brass, and Mo. Uniform (made from one wire material) as well asmore » combined (made from two wire materials with almost equal wire masses) wire arrays were considered. Uniform, combined, symmetric and asymmetric X-pinches (some of which included a small fraction of tracer Al wires) were also considered. Non-LTE kinetic models to account for K- and L-shell radiation were employed to understand radiative properties of Z-pinch and X-pinch plasmas. Implosion characteristics of such loads are discussed using the wire dynamics and MHD models. Opacity effects of Z-pinch plasmas are studied and benefits of using alloyed and tracer wires are highlighted.« less

Authors:
; ; ; ; ; ; ; ; ; ; ;  [1]; ; ;  [2];  [3];  [4]
  1. University of Nevada, Reno, NV 89557 (United States)
  2. Sandia National Laboratories Albuquerque, NM 87185 (United States)
  3. KTech Corporation, Albuquerque, NM 87123 (United States)
  4. NNSA/DOE, Headquarters, Washington, DC 20585 (United States)
Publication Date:
OSTI Identifier:
21344616
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1161; Journal Issue: 1; Conference: 16. international conference on atomic processes in plasmas, Monterey, CA (United States), 22-26 Mar 2009; Other Information: DOI: 10.1063/1.3241193; (c) 2009 American Institute of Physics; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; COPPER; ELECTRON TEMPERATURE; KEV RANGE; L SHELL; LASER IMPLOSIONS; LINEAR Z PINCH DEVICES; LONGITUDINAL PINCH; M SHELL; MAGNETOHYDRODYNAMICS; OPACITY; PLASMA; PLASMA DENSITY; PLASMA PRODUCTION; STAINLESS STEELS; WIRES; X RADIATION; X-RAY LASERS; ALLOYS; CARBON ADDITIONS; ELECTROMAGNETIC RADIATION; ELECTRONIC STRUCTURE; ELEMENTS; ENERGY RANGE; FLUID MECHANICS; HIGH ALLOY STEELS; HYDRODYNAMICS; IMPLOSIONS; IONIZING RADIATIONS; IRON ALLOYS; IRON BASE ALLOYS; LASERS; LINEAR PINCH DEVICES; MECHANICS; METALS; OPEN PLASMA DEVICES; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; PINCH DEVICES; PINCH EFFECT; RADIATIONS; STEELS; THERMONUCLEAR DEVICES; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Citation Formats

Safronova, A. S., Kantsyrev, V. L., Safronova, U. I., Esaulov, A. A., Yilmaz, M. F., Ouart, N. D., Shrestha, I., Williamson, K. W., Osborne, G. C., Wilcox, P. G., Weller, M. E., Shlyaptseva, V., Coverdale, C. A., Jones, B., Ampleford, D. J., LePell, P. D., and Deeney, C. Studying Radiation from Z-pinch Wire Array and X-Pinch Plasmas: K-shell Mg to M-shell Mo. United States: N. p., 2009. Web. doi:10.1063/1.3241193.
Safronova, A. S., Kantsyrev, V. L., Safronova, U. I., Esaulov, A. A., Yilmaz, M. F., Ouart, N. D., Shrestha, I., Williamson, K. W., Osborne, G. C., Wilcox, P. G., Weller, M. E., Shlyaptseva, V., Coverdale, C. A., Jones, B., Ampleford, D. J., LePell, P. D., & Deeney, C. Studying Radiation from Z-pinch Wire Array and X-Pinch Plasmas: K-shell Mg to M-shell Mo. United States. doi:10.1063/1.3241193.
Safronova, A. S., Kantsyrev, V. L., Safronova, U. I., Esaulov, A. A., Yilmaz, M. F., Ouart, N. D., Shrestha, I., Williamson, K. W., Osborne, G. C., Wilcox, P. G., Weller, M. E., Shlyaptseva, V., Coverdale, C. A., Jones, B., Ampleford, D. J., LePell, P. D., and Deeney, C. Thu . "Studying Radiation from Z-pinch Wire Array and X-Pinch Plasmas: K-shell Mg to M-shell Mo". United States. doi:10.1063/1.3241193.
@article{osti_21344616,
title = {Studying Radiation from Z-pinch Wire Array and X-Pinch Plasmas: K-shell Mg to M-shell Mo},
author = {Safronova, A. S. and Kantsyrev, V. L. and Safronova, U. I. and Esaulov, A. A. and Yilmaz, M. F. and Ouart, N. D. and Shrestha, I. and Williamson, K. W. and Osborne, G. C. and Wilcox, P. G. and Weller, M. E. and Shlyaptseva, V. and Coverdale, C. A. and Jones, B. and Ampleford, D. J. and LePell, P. D. and Deeney, C.},
abstractNote = {University-scale Z-pinch generators are able to produce plasmas with a broad range of temperatures, densities, and opacity properties depending on the type, size, and mass of wire-array loads and wire materials. Experiments with very different Z-pinch loads were performed on the 1 MA Zebra generator at UNR and analyzed during the last five years including Single and Nested Cylindrical, Conical, and various types of Planar Wire Arrays. It is shown that such wire arrays are good sources of x-rays and that they produce significant radiation yield (up to 25 kJ) on a ns time scale, and generate bright spots of sub-mm size. They can be used for studying radiative properties of moderate density (between 10{sup 18} cm{sup -3} and 5x10{sup 21} cm{sup -3}) and temperature (<=1.5 keV) plasmas. In addition, X-pinches generated higher density (>10{sup 22} cm{sup -3}) and temperature (>2 keV) plasmas on scales as small as a few mum to several mm in size. Wire materials with a broad range of nuclear charge Z were used, ranging from low-Z, such as alloyed Al wires with varying concentrations of Mg, to mid-Z, such as Stainless steel, Cu, Brass, and Mo. Uniform (made from one wire material) as well as combined (made from two wire materials with almost equal wire masses) wire arrays were considered. Uniform, combined, symmetric and asymmetric X-pinches (some of which included a small fraction of tracer Al wires) were also considered. Non-LTE kinetic models to account for K- and L-shell radiation were employed to understand radiative properties of Z-pinch and X-pinch plasmas. Implosion characteristics of such loads are discussed using the wire dynamics and MHD models. Opacity effects of Z-pinch plasmas are studied and benefits of using alloyed and tracer wires are highlighted.},
doi = {10.1063/1.3241193},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1161,
place = {United States},
year = {2009},
month = {9}
}