scholarly journals Investigation of the scattering of electrons by ions in the plasma of inertial confinement fusion in a magnetic field

2021 ◽  
Vol 78 (3) ◽  
pp. 14-21
Author(s):  
M.K. Issanova ◽  
◽  
S.K. Kodanova ◽  
N.Kh. Bastykova ◽  
A.I. Kenzhebekova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cross Section ◽  
Inertial Confinement Fusion ◽  
Dense Plasma ◽  
Inertial Confinement ◽  
Scattering Angle ◽  
Scattering Cross ◽  
Confinement Fusion ◽  
Coulomb Logarithm ◽  
The Magnetic Field

In this paper, the processes of electron-ion scattering in the plasma of inertial confinement fusion in a magnetic field were studied. The proposed model for studying the processes of scattering between charged particles is based on solving the equation of motion in a central field taking into account the external magnetic field, as well as the Coulomb logarithm, which is determined using the scattering angle in a pair collision. Collisions between an electron and an ion that interact via the Yukawa potential were investigated. Also, the Coulomb logarithm in a dense plasma in a magnetic field was calculated. The effect of taking into account the magnetic field on the scattering angles, the scattering cross-section and the Coulomb logarithm are studied. From the results obtained, it is established that taking into account the magnetic field led to a non-monotonic change in the scattering angle and a decrease in the scattering cross-section for weak particle interactions. It is also revealed that for large values of the interaction parameterβ, the magnetic field does not affect the value of the Coulomb logarithm. Thus, the obtained results allow us to study the effect of taking into account the magnetic field on the processes of electron scattering on an ion in the approximation of pair collisions in an external constant magnetic field in a dense plasma.

scholarly journals A demonstration of extracting the strength and wavelength of the magnetic field generated by the Weibel instability from proton radiography

2019 ◽  
Vol 7 ◽  
Author(s):  
Bao Du ◽  
Hong-Bo Cai ◽  
Wen-Shuai Zhang ◽  
Shi-Yang Zou ◽  
Jing Chen ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Induced Magnetic Field ◽  
Proton Radiography ◽  
Weibel Instability ◽  
Detection Plane ◽  
Key Characteristics ◽  
Confinement Fusion ◽  
The Magnetic Field

The Weibel instability and the induced magnetic field are of great importance for both astrophysics and inertial confinement fusion. Because of the stochasticity of this magnetic field, its main wavelength and mean strength, which are key characteristics of the Weibel instability, are still unobtainable experimentally. In this paper, a theoretical model based on the autocorrelation tensor shows that in proton radiography of the Weibel-instability-induced magnetic field, the proton flux density on the detection plane can be related to the energy spectrum of the magnetic field. It allows us to extract the main wavelength and mean strength of the two-dimensionally isotropic and stochastic magnetic field directly from proton radiography for the first time. Numerical calculations are conducted to verify our theory and show good consistency between pre-set values and the results extracted from proton radiography.

scholarly journals Gas–puff Z pinches with strong axial magnetic fields

1987 ◽  
Vol 5 (4) ◽  
pp. 699-706 ◽  
Author(s):  
F. S. Felber ◽  
F. J. Wessel ◽  
N. C. Wild ◽  
H. U. Rahman ◽  
A. Fisher ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Inertial Confinement Fusion ◽  
Scaling Laws ◽  
Axial Magnetic Field ◽  
Argon Laser ◽  
Nitrogen Laser ◽  
Inertial Confinement ◽  
X Ray ◽  
Confinement Fusion

Ultrahigh axial magnetic fields have been compressed and measured in a gas-puff Z pinch. A 0·5-MA, 2–cm-radius annular gas-puff Z pinch with a 3-minute repetition rate was imploded radially onto an axial seed field, causing the field to compress. Axial magnetic field compressions up to 180 and peak magnetic fields up to 1·6 MG were measured. Faraday rotation of an argon laser (515·4 nm) in a quartz fiber on axis was the principal magnetic field diagnostic. Other diagnostics included a nitrogen laser interferometer, x-ray diodes, and magnetic field probes.The magnetic field compression results are consistent with simple snowplow and self-similar analytic models, which are presented. The axial magnetic fields strongly affect the Z pinch dynamics. Even small axial fields help stabilize the pinches, some of which exhibit several stable radial bounces during a current pulse.The method of compressing axial fields in a gas-puff Z pinch is extrapolable to the order of 100 MG. Scaling laws are presented. Potential applications of ultrahigh axial fields in Z pinches are discussed for x-ray lasers, inertial confinement fusion, and collimated sources of gamma radiation.

scholarly journals Time-like detonation in presence of magnetic field

2019 ◽  
Vol 37 (01) ◽  
pp. 30-37
Author(s):  
Shailendra Singh ◽  
Ritam Mallick
Keyword(s):  
Magnetic Field ◽  
Inertial Confinement Fusion ◽  
Gluon Plasma ◽  
High Energy ◽  
Inertial Confinement ◽  
Time Varying ◽  
Continuous Transition ◽  
The Core ◽  
Confinement Fusion ◽  
Sinusoidal Magnetic Field

AbstractWe study the effect of magnetic field in an implosion process achieved by radiation. A time-varying sinusoidal magnetic field is seen to affect the continuous transition of space-like detonation to time-like detonation at the core of implosion region. The oscillating varying magnetic field has a significant effect in increasing the volume of the time-like detonation of the core of implosion and also modifies the time of the implosion process. This transition can have significant outcome both theoretically and experimentally in the areas of high-energy hadronization of quark–gluon plasma matter and inertial confinement fusion efforts of fuels.

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 Plasma physics: A review and applications with special reference to inertial confinement fusion energy

1970 ◽  
Vol 1 (1) ◽  
pp. 21-24
Author(s):  
Lok N. Jha ◽  
Jeevan J. Nakarmi
Keyword(s):  
Magnetic Field ◽  
Plasma Physics ◽  
Special Reference ◽  
Inertial Confinement Fusion ◽  
Fusion Energy ◽  
Thermonuclear Fusion ◽  
Basic Knowledge ◽  
Inertial Confinement ◽  
Confinement Fusion

A brief description of plasma, its types and fundamental requirements necessary to study the physics of plasma has been presented through this article. Information given here would be useful to those who have the basic knowledge of physics. Mathematical complications have been avoided to suit the purpose. Varied applications of plasma have been introduced. A little detail has been devoted to one of the major applications of plasma physics known as theoretical thermonuclear fusion studies. Physics of inertial confinement together with the role of self-generated magnetic field in the design of fusion targets have also been described. Himalayan Journal of Sciences 1(1): 21-24, 2003

scholarly journals Two-stream instability for a light ion beam-plasma system with external magnetic field

1994 ◽  
Vol 12 (1) ◽  
pp. 13-16
Author(s):  
T. Okada ◽  
H. Tazawa
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Inertial Confinement Fusion ◽  
Ion Beam ◽  
Inertial Confinement ◽  
Plasma System ◽  
Pic Simulation ◽  
Particle In Cell ◽  
Beam Plasma ◽  
Confinement Fusion

For inertial confinement fusion (ICF), a focused light ion beam (LIB) is required to propagate stably through a chamber to a target. It is pointed out that the applied external magnetic field is important for LIB propagation. To investigate the influence of the external magnetic field on the LIB propagation, the electrostatic dispersion relation of the magnetized light ion beam-plasma system was analyzed. The particle in-cell (PIC) simulation results are presented for a light ion beam-plasma system with an external magnetic field.

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