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Development and characterization of a Z-pinch-driven hohlraum high-yield inertial confinement fusion target concept

Michael E. Cuneo, Roger A. Vesey, John L. Porter, Gordon A. Chandler, David L. Fehl, Terrance L. Gilliland, David L. Hanson, John S. McGurn, Paul G. Reynolds, Laurence E. Ruggles, Hans Seamen, Rick B. Spielman (+9 others)
2001 Physics of Plasmas  

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We describe the injtial experiments to study the Z-pinch-drjven hohlraum ligh-yield jnertjal confinement fusion (ICF) concept of Porter [J. H. Hammer et al., Phys. Plasmas, 6, 2129( 1999)]. We show that the relationship between measured pinch power, hohlraum temperature, and secondary hohlraum coupling ("hohlraurn energetic") is well understood from O-D semi-analytic, 2-D viewfactor, and 2-D radiation magneto-hydrodynamics models. These experiments have shown the highest x-ray powers coupled to
more » ... any Z-pjnch driven secondary (2655 TW), indicating the concept could scale to fusion yields of 400 MJ. We have also developed a novel, single-sided power feed, double-pinch driven secondary that meets the pinch simultaneity requirements for polar radiation symmetry. This source wjll perrnjt investigation of the pinch power balance and hohh-aum geometry requirements for ICF reIevant secondary radiation symmetry, leading to a capsule implosion capability on the Z accelerator [R. B. Spielman. er al.. Phys. Plasmas. 5,2105]. This concept is depicted in Fig. 1 . In this concept. two Z-pinch-driven primary hohlraums are located at either end of a coaxial secondary hohlraum containing a fusion capsule5. This topology of coupling two hot x-ray source regions to a cooler capsule secondary is similar to some laser-driven hohlraum config,urations'"s. Each primary hohlmurn is driven by the implosion of a wire army consisting of hundreds of uniformly-spaced fine W wires. Electromagnetic power enters each primary through a small (2 mm~vide) annular anode-cathode (AK) gap at the base of the \vire array. The AK gaps are coupled to a single pulsed-power driver through their own set of DISCLAIMER
doi:10.1063/1.1348328 fatcat:3flrhfoaqjeqxnl4xejh3b42dy
Citation

Michael E. Cuneo, Roger A. Vesey, John L. Porter, Gordon A. Chandler, David L. Fehl, Terrance L. Gilliland, David L. Hanson, John S. McGurn, Paul G. Reynolds, Laurence E. Ruggles, Hans Seamen, Rick B. Spielman, Ken W. Struve, William A. Stygar, Walter W. Simpson, Jose A. Torres, David F. Wenger, James H. Hammer, Peter W. Rambo, Darrell L. Peterson, George C. Idzorek. "Development and characterization of a Z-pinch-driven hohlraum high-yield inertial confinement fusion target concept." Physics of Plasmas 8.5 (2001) 2257-2267