A theoretical model for radiation heat conduction between deuterium–tritium fuel and a high-Z pusher in volume ignition in inertial confinement fusion

2021 ◽  
Vol 28 (3) ◽  
pp. 032702
Author(s):  
Rui-Hua Xu ◽  
Ying-Kui Zhao
Keyword(s):  
Heat Conduction ◽  
Theoretical Model ◽  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Radiation Heat ◽  
Confinement Fusion ◽  
Volume Ignition

Self-similar solutions of unsteady ablation flows in inertial confinement fusion

2008 ◽  
Vol 603 ◽  
pp. 151-178 ◽  
Author(s):  
C. BOUDESOCQUE-DUBOIS ◽  
S. GAUTHIER ◽  
J.-M. CLARISSE
Keyword(s):  
Heat Conduction ◽  
Inertial Confinement Fusion ◽  
Group Symmetry ◽  
Physical Analysis ◽  
Inertial Confinement ◽  
Nonlinear Heat Conduction ◽  
Starting Point ◽  
Confinement Fusion ◽  
Self Similar ◽  
Similar Solutions

We exhibit and detail the properties of self-similar solutions for inviscid compressible ablative flows in slab symmetry with nonlinear heat conduction which are relevant to inertial confinement fusion (ICF). These solutions have been found after several contributions over the last four decades. We first derive the set of ODEs – a nonlinear eigenvalue problem – which governs the self-similar solutions by using the invariance of the Euler equations with nonlinear heat conduction under the two-parameter Lie group symmetry. A sub-family which leaves the density invariant is detailed since these solutions may be used to model the ‘early-time’ period of an ICF implosion where a shock wave travels from the front to the rear surface of a target. A chart allowing us to determine the starting point of a numerical solution, knowing the physical boundary conditions, has been built. A physical analysis of these unsteady ablation flows is then provided, the associated dimensionless numbers (Mach, Froude and Péclet numbers) being calculated. Finally, we show that self-similar ablation fronts generated within the framework of the above hypotheses (electron heat conduction, growing heat flux at the boundary, etc.) and for large heat fluxes and not too large pressures at the boundary do not satisfy the low-Mach-number criteria. Indeed both the compressibility and the stratification of the hot-flow region are too large. This is, in particular, the case for self-similar solutions obtained for energies in the range of the future Laser MegaJoule laser facility. Two particular solutions of this latter sub-family have been recently used for studying stability properties of ablation fronts.

Volume ignition for inertial confinement fusion tested by different stopping power models

1996 ◽  
Author(s):  
H. Hora ◽  
S. Eliezer ◽  
J. J. Honrubia ◽  
R. Höpfl ◽  
J. M. Martinez-Val ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Stopping Power ◽  
Inertial Confinement ◽  
Confinement Fusion ◽  
Power Models ◽  
Volume Ignition

scholarly journals Volume ignition of laser driven fusion pellets and double layer effects

1988 ◽  
Vol 6 (2) ◽  
pp. 163-182 ◽  
Author(s):  
L. Cicchitelli ◽  
S. Eliezer ◽  
M. P. Goldsworthy ◽  
F. Green ◽  
H. Hora ◽  
...  
Keyword(s):  
Electric Fields ◽  
Inertial Confinement Fusion ◽  
Laser Pulses ◽  
Spark Ignition ◽  
State Density ◽  
Double Layers ◽  
Inertial Confinement ◽  
Confinement Fusion ◽  
Volume Compression ◽  
Volume Ignition

The realization of an ideal volume compression of laser-irradiated fusion pellets (by C. Yamanaka) opens the possibility for an alternative to spark ignition proposed for many years for inertial confinement fusion. A re-evaluation of the difficulties of the central spark ignition of laser driven pellets is given. The alternative volume compression theory, together with volume burn and volume ignition (discovered in 1977), have received less attention and are re-evaluated in view of the experimental verification by Yamanaka, generalized fusion gain formulas, and the variation of optimum temperatures derived at self-ignition. Reactor-level DT fusion with MJ-laser pulses and volume compression to 50 times the solid-state density are estimated. Dynamic electric fields and double layers at the surface and in the interior of plasmas result in new phenomena for the acceleration of thermal electrons to suprathermal electrons. Double layers also cause a surface tension which stabilizes against surface wave effects and Rayleigh–Taylor instabilities.

scholarly journals Critical value of volume ignition and condition of nonequilibriem burning of DT in inertial confinement fusion

2015 ◽  
Vol 64 (4) ◽  
pp. 045205
Author(s):  
Zhao Ying-Kui ◽  
Ouyang Bei-Yao ◽  
Wen Wu ◽  
Wang Min
Keyword(s):  
Inertial Confinement Fusion ◽  
Critical Value ◽  
Inertial Confinement ◽  
Confinement Fusion ◽  
Volume Ignition

scholarly journals Volume ignition targets for heavy-ion inertial fusion

1994 ◽  
Vol 12 (4) ◽  
pp. 681-717 ◽  
Author(s):  
J.M. Martínez-Val ◽  
S. Eliezer ◽  
M. Piera
Keyword(s):  
Inertial Confinement Fusion ◽  
Heavy Ion ◽  
Inertial Fusion ◽  
Inertial Confinement ◽  
Direct Drive ◽  
Ablation Process ◽  
Confinement Fusion ◽  
Indirect Drive ◽  
Energy Gains ◽  
Volume Ignition

Inertial confinement fusion (ICF) targets can be imploded by heavy-ion beams (HIBs) in order to obtain a highly compressed fuel microsphere. The hydrodynamic efficiency of the compression can be optimized by tuning the ablation process in order to produce the total evaporation of the pusher material by the end of the implosion. Such pusherless compressions produce very highly compressed targets for relatively short confinement times. However, these times are long enough for a fusion burst to take place, and burnup fractions of 30% and higher can be obtained if the volume ignition requirements are met. Numerical simulations demonstrate that targets of 1-mg DT driven by a few MJ can yield energy gains of over 70. Although direct drive is used in these simulations, the main conclusions about volume ignition are also applicable to indirect drive.

scholarly journals Analysis of the retrograde hydrogen boron fusion gains at inertial confinement fusion with volume ignition

1997 ◽  
Vol 15 (4) ◽  
pp. 565-574 ◽  
Author(s):  
Chr. Scheffel ◽  
R.J. Stening ◽  
H. Hora ◽  
R. Höpfl ◽  
J.M. Martinez-Val ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Fusion Reaction ◽  
Relativistic Correction ◽  
Stopping Power ◽  
Inertial Confinement ◽  
Optimum Temperature ◽  
Power Stations ◽  
Confinement Fusion ◽  
Nuclear Fusion Reaction ◽  
Volume Ignition

The very clean nuclear fusion reaction of hydrogen and boron-11 by inertial confinement arrives at conditions for power stations by volume ignition only at compressions to 100,000 times the solid state. The earlier (numerically) observed anomaly of decreasing gain at increasing density (retrograde behavior) is analyzed and the reason clarified: the strong stopping power mechanism, based on Gabor's collective model, is reaching its limit of too small Debye lengths at the extremely high densities because of the optimum temperature in the range of 30 keV due to the reabsorption of the bremsstrahlung. The relativistic correction of the bremsstrahlung for the always much higher temperatures after volume ignition is included from Maxon's model.

High-gain volume ignition for inertial confinement fusion (ICF)

1994 ◽  
Author(s):  
H. Hora ◽  
S. Eliezer ◽  
J. M. Martinez-Val ◽  
G. H. Miley
Keyword(s):  
Inertial Confinement Fusion ◽  
High Gain ◽  
Inertial Confinement ◽  
Confinement Fusion ◽  
Volume Ignition

scholarly journals Volume ignition of inertial confinement fusion of deuterium-helium(3) and hydrogen-boron(ll) clean fusion fuel

1992 ◽  
Vol 10 (1) ◽  
pp. 145-154 ◽  
Author(s):  
P. Pieruschka ◽  
L. Cicchitelli ◽  
R. Khoda-Bakhsh ◽  
E. Kuhn ◽  
G. H. Miley ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Fusion Energy ◽  
Laser Pulses ◽  
Laser Fusion ◽  
Inertial Confinement ◽  
The Future ◽  
Confinement Fusion ◽  
Helium 3 ◽  
Fusion Energy Reactor ◽  
Volume Ignition

Since DT laser fusion with 10-MJ laser pulses for 1000-MJ output now offers the physics solution for an economical fusion energy reactor, the conditions are evaluated assuming that controlled ICF reactions will become possible in the future using clean nuclear fusion fuel such as deuterium-helium(3) or hydrogen-boron(11). Using the transparent physics mechanisms of volume ignition of the fuel capsules, we show that the volume ignition for strong reduction of the optimum initial temperature can be reached for both types of fuels if a compression about 100 times higher than those in present-day laser compression experiments is attained in the future. Helium(3) laser-pulse energies are then in the same range as for DT, but ten times higher energies will be required for hydrogenboron(11).

Gain analysis of proton–lithium pellets at inertial confinement fusion with volume ignition

2013 ◽  
Vol 87 (11) ◽  
pp. 1109-1112 ◽  
Author(s):  
S. S. Razavipour ◽  
B. Malekynia
Keyword(s):  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Confinement Fusion ◽  
Volume Ignition
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