scholarly journals The impact of laser plasma interactions on three-dimensional drive symmetry in inertial confinement fusion implosions

2014 ◽  
Vol 21 (7) ◽  
pp. 072712 ◽  
Author(s):  
J. L. Peterson ◽  
P. Michel ◽  
C. A. Thomas ◽  
R. P. J. Town
Keyword(s):  
Laser Plasma ◽  
Inertial Confinement Fusion ◽  
Three Dimensional ◽  
Inertial Confinement ◽  
Plasma Interactions ◽  
Laser Plasma Interactions ◽  
Confinement Fusion ◽  
Fusion Implosions ◽  
The Impact

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.

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

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 Target alignment in the Shen-Guang II Upgrade laser facility

2018 ◽  
Vol 6 ◽  
Author(s):  
Lei Ren ◽  
Ping Shao ◽  
Dongfeng Zhao ◽  
Yang Zhou ◽  
Zhijian Cai ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Short Pulse ◽  
Three Dimensional ◽  
Nanosecond Laser ◽  
Alignment Error ◽  
Inertial Confinement ◽  
Pulse Beam ◽  
Rotation Sensor ◽  
Confinement Fusion ◽  
Laser Facility

The Shen-Guang II Upgrade (SG-II-U) laser facility consists of eight high-power nanosecond laser beams and one short-pulse picosecond petawatt laser. It is designed for the study of inertial confinement fusion (ICF), especially for conducting fast ignition (FI) research in China and other basic science experiments. To perform FI successfully with hohlraum targets containing a golden cone, the long-pulse beam and cylindrical hohlraum as well as the short-pulse beam and cone target alignment must satisfy tight specifications (30 and $20~\unicode[STIX]{x03BC}\text{m}$ rms for each case). To explore new ICF ignition targets with six laser entrance holes (LEHs), a rotation sensor was adapted to meet the requirements of a three-dimensional target and correct beam alignment. In this paper, the strategy for aligning the nanosecond beam based on target alignment sensor (TAS) is introduced and improved to meet requirements of the picosecond lasers and the new six LEHs hohlraum targets in the SG-II-U facility. The expected performance of the alignment system is presented, and the alignment error is also discussed.

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