scholarly journals Laser-plasma interactions relevant to Inertial Confinement Fusion

10.2172/12528 ◽  
1998 ◽  
Author(s):  
K. B. Wharton
Keyword(s):  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Plasma Interactions ◽  
Laser Plasma Interactions ◽  
Confinement Fusion

Multiple-beam laser–plasma interactions in inertial confinement fusion

2014 ◽  
Vol 21 (5) ◽  
pp. 055501 ◽  
Author(s):  
J. F. Myatt ◽  
J. Zhang ◽  
R. W. Short ◽  
A. V. Maximov ◽  
W. Seka ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Plasma Interactions ◽  
Laser Plasma Interactions ◽  
Multiple Beam ◽  
Beam Laser ◽  
Confinement Fusion

Three-dimensional electromagnetic relativistic particle-in-cell code VLPL (Virtual Laser Plasma Lab)

1999 ◽  
Vol 61 (3) ◽  
pp. 425-433 ◽  
Author(s):  
A. PUKHOV
Keyword(s):  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Three Dimensional ◽  
Inertial Confinement ◽  
Particle In Cell ◽  
Laser Plasma Interactions ◽  
Electromagnetic Simulations ◽  
Self Focusing ◽  
Confinement Fusion ◽  
Pic Code

The three-dimensional particle-in-cell (PIC) code VLPL (Virtual Laser Plasma Lab) allows, for the first time, direct fully electromagnetic simulations of relativistic laser–plasma interactions. Physical results on relativistic self-focusing in under-dense plasma are presented. It is shown that background plasma electrons are accelerated to multi-MeV energies and 104 T magnetic fields are generated in the process of self-focusing at high laser intensities. This physics is crucial for the fast ignitor concept in inertial confinement fusion. Advances in the numerical PIC algorithm used in the code VLPL are reviewed here.

scholarly journals Effect of Convective, Diffusive and Source Terms in Self Generated Magnetic Field due to Laser Plasma Interactions

2015 ◽  
Vol 5 ◽  
pp. 27-30
Author(s):  
S. Khanal ◽  
R Khanal
Keyword(s):  
Magnetic Field ◽  
Evolution Equation ◽  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Temporal Variations ◽  
Inertial Confinement ◽  
Source Terms ◽  
Laser Plasma Interactions ◽  
Confinement Fusion ◽  
Transformation Methods

Laser-plasma interaction phenomenon has various applications and the most important one is in the Inertial confinement Fusion. Spatial and temporal variations of self generated magnetic field have been studied within the framework of magneto hydrodynamics. The evolution equation that describes the generation of magnetic field is solved using complex Fourier and Laplace transformation methods as an initial value problem. Convective, diffusive and source terms are considered in the evolution equation and are solved theoretically. Magnetic fields of the order of megagauss have been obtained among which the maximum field is just about 40 MG. The results are comparable with earlier reported results.The Himalayan Physics Year 5, Vol. 5, Kartik 2071 (Nov 2014)Page: 27-30  

scholarly journals Progress in proton radiography for diagnosis of ICF-relevant plasmas

2010 ◽  
Vol 28 (2) ◽  
pp. 277-284 ◽  
Author(s):  
M. Borghesi ◽  
G. Sarri ◽  
C.A. Cecchetti ◽  
I. Kourakis ◽  
D. Hoarty ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Space Physics ◽  
Inertial Confinement ◽  
Proton Radiography ◽  
Laser Plasma Interaction ◽  
Laser Plasma Interactions ◽  
Thin Foils ◽  
Confinement Fusion ◽  
Laser Facility

AbstractProton radiography using laser-driven sources has been developed as a diagnostic since the beginning of the decade, and applied successfully to a range of experimental situations. Multi-MeV protons driven from thin foils via the Target Normal Sheath Acceleration mechanism, offer, under optimal conditions, the possibility of probing laser-plasma interactions, and detecting electric and magnetic fields as well as plasma density gradients with ~ps temporal resolution and ~ 5–10 µm spatial resolution. In view of these advantages, the use of proton radiography as a diagnostic in experiments of relevance to Inertial Confinement Fusion is currently considered in the main fusion laboratories. This paper will discuss recent advances in the application of laser-driven radiography to experiments of relevance to Inertial Confinement Fusion. In particular we will discuss radiography of hohlraum and gasbag targets following the interaction of intense ns pulses. These experiments were carried out at the HELEN laser facility at AWE (UK), and proved the suitability of this diagnostic for studying, with unprecedented detail, laser-plasma interaction mechanisms of high relevance to Inertial Confinement Fusion. Non-linear solitary structures of relevance to space physics, namely phase space electron holes, have also been highlighted by the measurements. These measurements are discussed and compared to existing models.

scholarly journals Review on spontaneous magnetic fields in laser-produced plasmas: Phenomena and measurements

1991 ◽  
Vol 9 (4) ◽  
pp. 841-862 ◽  
Author(s):  
J. A. Stamper
Keyword(s):  
Magnetic Fields ◽  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Small Diameter ◽  
Spectral Lines ◽  
Optical Methods ◽  
Focal Region ◽  
Inertial Confinement ◽  
Plasma Interactions ◽  
Laser Plasma Interactions

Large (megagauss) “spontaneous” magnetic fields are produced by laser–plasma interactions when a short, powerful laser pulse is focused to a small diameter onto a solid target. The relevance of these magnetic fields to inertial confinement fusion applications depends on the numerous ways in which they can affect laser–plasma interactions and the resulting plasma. Theoretical studies have dealt with a variety (thermal, radiative, and dynamo) of generation mechanisms and with the associated transport and instability phenomena. The fields, originally observed with small induction probes placed near the target, have been studied in the focal region by optical methods. These optical diagnostics have used Faraday rotation of a probing laser beam and Zeeman profiles of emitted spectral lines.

scholarly journals Generation of shock waves in dense plasmas by high-intensity laser pulses

Nukleonika ◽  
2015 ◽  
Vol 60 (2) ◽  
pp. 193-198 ◽  
Author(s):  
John Pasley ◽  
I. A. Bush ◽  
Alexander P. L. Robinson ◽  
P. P. Rajeev ◽  
S. Mondal ◽  
...  
Keyword(s):  
Shock Waves ◽  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Laser Pulses ◽  
Fast Ignition ◽  
Intense Laser ◽  
Inertial Confinement ◽  
Relative Significance ◽  
Wide Range ◽  
Confinement Fusion

Abstract When intense short-pulse laser beams (I > 1022 W/m2, τ < 20 ps) interact with high density plasmas, strong shock waves are launched. These shock waves may be generated by a range of processes, and the relative significance of the various mechanisms driving the formation of these shock waves is not well understood. It is challenging to obtain experimental data on shock waves near the focus of such intense laser–plasma interactions. The hydrodynamics of such interactions is, however, of great importance to fast ignition based inertial confinement fusion schemes as it places limits upon the time available for depositing energy in the compressed fuel, and thereby directly affects the laser requirements. In this manuscript we present the results of magnetohydrodynamic simulations showing the formation of shock waves under such conditions, driven by the j × B force and the thermal pressure gradient (where j is the current density and B the magnetic field strength). The time it takes for shock waves to form is evaluated over a wide range of material and current densities. It is shown that the formation of intense relativistic electron current driven shock waves and other related hydrodynamic phenomena may be expected over time scales of relevance to intense laser–plasma experiments and the fast ignition approach to inertial confinement fusion. A newly emerging technique for studying such interactions is also discussed. This approach is based upon Doppler spectroscopy and offers promise for investigating early time shock wave hydrodynamics launched by intense laser pulses.

scholarly journals Laser-plasma interaction in direct-drive inertial confinement fusion

2016 ◽  
Vol 717 ◽  
pp. 012040 ◽  
Author(s):  
J F Myatt ◽  
J Shaw ◽  
V N Goncharov ◽  
J Zhang ◽  
A V Maximov ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Direct Drive ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Confinement Fusion
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