NDLI: Double Z-Pinch-Driven Hohlraums: Symmetric ICF Capsule Implosions and Wire-Array Z-Pinch Source Physics

Content Provider	IEEE Xplore Digital Library
Author	Cuneo, M.E.
Copyright Year	2005
Description	Author affiliation: Sandia National Laboratories (Cuneo, M.E.)
Abstract	Summary form only given. There continues to be dramatic progress in applying pulsed-power driven wire arrays to research in Inertial Confinement Fusion (ICF). The Z facility at Sandia National Laboratories delivers -20 MA to a wire-array z pinch that supersonically implodes the wire-array plasma, and ultimately produces a 100-200 TW X-ray source at stagnation. Wire array X-ray sources appear to be an excellent match to the driver capital cost, hohlraum size, and radiation pulse lengths required to implode the large-diameter (ges 2.65 mm) ICF capsules necessary to achieve high-yield (ges 400 MJ) fusion. Two different z-pinch driven ICF concepts are being studied: the dynamic-hohlraum and the double-ended z-pinch-driven hohlraum (DEH). This talk will focus on progress in achieving radiation symmetry of 2-4% for ICF capsule implosions with the DEH and in our understanding and scaling of the wire-array source. The DEH is the first pulsed power concept to demonstrate ICF-relevant radiation symmetry. In this concept, two wire-array pinches heat two separate primary hohlraums located at either end of a central coaxial secondary hohlraum containing the ICF capsule. X-ray backlighting measurements show control of low-mode radiation symmetry with 2.2-4.7 mm capsule diameters. High radial capsule-convergence ratios of 14-21 have been achieved. Scaling to capsule drive temperatures relevant for fusion will require total X-ray powers of ~2 PW. The DEH approach largely decouples the z-pinch source physics (in the primary hohlraum) from capsule implosion physics (in the secondary hohlraum), allowing independent study of both. This has enabled rapid progress in our understanding of high-current single and nested wire array physics. Experiments have studied the scaling of wire array ablation and implosion dynamics and X-ray power with current, array mass, and current rate of rise. The mass distribution of single and nested arrays has been measured with monochromatic X-ray backlighti
Sponsorship	Plasma Sci. Appl. Comm. IEEE Nucl. Plasma Sci. Soc.
Starting Page	51
Ending Page	65
File Size	138456
Page Count	15
File Format	PDF
ISBN	0780393007
ISSN	07309244
DOI	10.1109/PLASMA.2005.359028
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Physics Plasma simulation Laboratories Radio frequency Plasma measurements Cathodes Space technology Atmospheric-pressure plasmas Gyrotrons Plasma materials processing
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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