Spectroscopic and Imaging Study of Combined W and Mo -pinches at 1 MA -pinch Generators

Alla S. Safronova,Victor L. Kantsyrev,Dmitry A. Fedin,Glenn Osborne,M. Fatih Yilmaz,Travis A Hoppe,Vidya Nalajala,Jonathan D. Douglass,Ryan D. McBride,M. D. Mitchell,L. M. Maxson,D. A. Hammer

Plasma Science, IEEE Transactions（2006）

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摘要

Experiments with X-pinches made with both Mo and W wires have been performed on 1-MA pulsed power generators at Cornell University and University of Nevada, Reno. X-ray images and spectra have been studied and compared for three different configurations of X-pinch loads with Mo and W wires. For all X-pinches, the image size decreases with decreasing wavelength and photoconducting diode (PCD) signals show multiple bursts except for one variant of the mixed Mo and W configurations. Time-gated, as well as time-integrated, images indicate the presence of radiation from energetic electrons. Previous experience with application of L-shell Mo modeling to various Z- and X-pinch experiments helped to determine plasma parameters in the X-pinches studied here, and permitted identification of M-shell W spectral features useful for plasma parameter estimation

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关键词

X-ray spectra,Z pinch,molybdenum,photodiodes,plasma diagnostics,tungsten,1 MA,L-shell Mo modeling,M-shell W spectral features,Mo,Mo wires,W,W wires,X-ray imaging,X-ray spectroscopy,Z-pinch generators,energetic electron radiation,mixed W-Mo X-pinches,photoconducting diode signals,plasma parameter estimation,pulsed power generators,time-gated images,time-integrated images,L-shell Mo radiation,M-shell W radiation,X-ray imaging,X-ray spectroscopy,modeling

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