Mode-selective symmetry control for indirect-drive inertial confinement fusion hohlraums

Achieving a high degree of radiation symmetry is a critical feature of target designs for indirect-drive inertial confinement fusion. Typically, the radiation flux incident on the capsule is required to be uniform to 1% or better. It is generally possible to design a hohlraum that provides low values of higher-order asymmetry (Legendre mode P10 and above) due to geometric averaging effects. Because low-order intrinsic asymmetry (e.g., Legendre modes P2 and P4) are less strongly reduced by geometric averaging alone, the development of innovative control techniques has been an active area of research in the inertial fusion community over the years. Shields placed inside the hohlraum are one example of a technique that has often been proposed and incorporated into hohlraum target designs. Simple mathematical considerations are presented indicating that radiation shields may be designed to specifically tune lower-order modes (e.g., P4) without deleterious effects on the higher order modes. Two-dimensional vie...

[1]  Peter A. Amendt,et al.  Assessing the prospects for achieving double-shell ignition on the National Ignition Facility using vacuum hohlraums , 2007 .

[2]  G. R. Bennett,et al.  Target design for high fusion yield with the double Z-pinch-driven hohlraum , 2006 .

[3]  G. R. Bennett,et al.  Advances in target design for heavy ion fusion , 2005 .

[4]  O. Landen,et al.  Using Laser Entrance Hole Shields to Increase Coupling Efficiency in Indirect Drive Ignition Targets for the National Ignition Facility (NIF) , 2005 .

[5]  Gordon Andrew Chandler,et al.  Progress in symmetric ICF capsule implosions and wire-array z-pinch source physics for double-pinch-driven hohlraums , 2005 .

[6]  Michael Edward Cuneo,et al.  Heavy-ion target physics and design in the USA , 2005 .

[7]  John Edwards,et al.  The effects of fill tubes on the hydrodynamics of ignition targets and prospects for ignition , 2005 .

[8]  O. Landen,et al.  The physics basis for ignition using indirect-drive targets on the National Ignition Facility , 2004 .

[9]  R. G. Adams,et al.  Symmetric inertial confinement fusion capsule implosions in a high-yield-scale double-Z-pinch-driven hohlraum on Z , 2003 .

[10]  Peter A. Amendt,et al.  Role of laser beam geometry in improving implosion symmetry and performance for indirect-drive inertial confinement fusion , 2003 .

[11]  R. G. Adams,et al.  Radiation symmetry control for inertial confinement fusion capsule implosions in double Z-pinch hohlraums on Z , 2003 .

[12]  R. G. Adams,et al.  Demonstration of radiation symmetry control for inertial confinement fusion in double Z-pinch hohlraums. , 2003, Physical review letters.

[13]  R. G. Adams,et al.  Symmetric inertial-confinement-fusion-capsule implosions in a double-z-pinch-driven hohlraum. , 2002, Physical review letters.

[14]  O L Landen,et al.  Hohlraum-driven high-convergence implosion experiments with multiple beam cones on the omega laser facility. , 2002, Physical review letters.

[15]  G. R. Bennett,et al.  Double Z-pinch hohlraum drive with excellent temperature balance for symmetric inertial confinement fusion capsule implosions. , 2002, Physical review letters.

[16]  Max Tabak,et al.  Progress in Heavy Ion Target Capsule and Hohlraum Design , 2002 .

[17]  Roy Kishony,et al.  Ignition condition and gain prediction for perturbed inertial confinement fusion targets , 2001 .

[18]  Gordon Andrew Chandler,et al.  Measurement of radiation symmetry in Z-pinch-driven hohlraums , 2001 .

[19]  Peter A. Amendt,et al.  National Ignition Facility scale hohlraum asymmetry studies by thin shell radiography , 2001 .

[20]  Gordon Andrew Chandler,et al.  Development and Characterization of a Z-Pinch Driven Hohlraum High-Yield Inertial Confinement Fusion Target Concept , 2001 .

[21]  Max Tabak,et al.  Progress in target physics and design for heavy ion fusion , 1999 .

[22]  G. O. Allshouse,et al.  Deposition and drive symmetry for light ion ICF targets , 1999 .

[23]  Max Tabak,et al.  A distributed radiator, heavy ion target driven by Gaussian beams in a multibeam illumination geometry , 1999 .

[24]  D. S. Bailey,et al.  High yield inertial confinement fusion target design for a z-pinch-driven hohlraum , 1999 .

[25]  Peter A. Amendt,et al.  A simple time-dependent analytic model of the P2 asymmetry in cylindrical hohlraums , 1999 .

[26]  Peter A. Amendt,et al.  Hohlraum symmetry measurements with surrogate solid targets (invited) , 1999 .

[27]  Steven W. Haan,et al.  A comparison of three-dimensional multimode hydrodynamic instability growth on various National Ignition Facility capsule designs with HYDRA simulations , 1998 .

[28]  J. Meyer-ter-Vehn,et al.  A 3 MJ optimized hohlraum target for heavy ion inertial confinement fusion , 1998 .

[29]  R. M. Shagaliev,et al.  Indirect-drive inertial fusion targets for two-sided heavy-ion illumination , 1998 .

[30]  Peter A. Amendt,et al.  Hohlraum Symmetry Experiments with Multiple Beam Cones on the Omega Laser Facility , 1998 .

[31]  J. Lindl,et al.  Inertial Confinement Fusion: The Quest for Ignition and Energy Gain Using Indirect Drive , 1998 .

[32]  Max Tabak,et al.  Design of a distributed radiator target for inertial fusion driven from two sides with heavy ion beams , 1998 .

[33]  J. Wallace,et al.  Symmetry experiments in gas-filled hohlraums at NOVA , 1996 .

[34]  D. Harris,et al.  Ignition target design and robustness studies for the National Ignition Facility , 1996 .

[35]  M. Tabak,et al.  Configurations of radiation driven targets for heavy ion fusion , 1995 .

[36]  Peter A. Amendt,et al.  Design and modeling of ignition targets for the National Ignition Facility , 1995 .

[37]  Daniel N. Baker,et al.  The role of symmetry in indirect‐drive laser fusion , 1995 .

[38]  Turner,et al.  Modeling and interpretation of Nova's symmetry scaling data base. , 1994, Physical review letters.

[39]  D. Phillion,et al.  Dynamical compensation of irradiation nonuniformities in a spherical hohlraum illuminated with tetrahedral symmetry by laser beams , 1994 .

[40]  S. Haan Radiation transport between concentric spheres , 1994 .

[41]  S. Atzeni Implosion symmetry and burn efficiency in ICF , 1991 .

[42]  A. Caruso,et al.  The Quality of the Illumination for a Spherical Capsule Enclosed in a Radiating Cavity , 1991 .

[43]  S. Atzeni Sensitivity of ICF Reactor Targets to Long-Wavelength Drive Nonuniformities , 1990 .

[44]  William H. Press,et al.  Numerical Recipes: FORTRAN , 1988 .

[45]  M. Murakami,et al.  Smoothing of Nonuniformity by X-ray Radiation in Cannonball Target , 1986 .