Numerical study of the ionization process and radiation transport in the channel of plasma accelerator

2017 ◽  
Vol 51 ◽  
pp. 169-179 ◽  
Author(s):  
A.N. Kozlov ◽  
V.S. Konovalov
Keyword(s):  
Radiation Transport ◽  
Numerical Study ◽  
Plasma Accelerator ◽  
Ionization Process

scholarly journals Study of pulsating flows of ionizing hydrogen in the plasma accelerator based on two-dimensional model

2021 ◽  
pp. 1-24
Author(s):  
Andrey Nikolaevich Kozlov ◽  
Venyamin Sergeevich Konovalov ◽  
Svetlana Olegovna Novikova
Keyword(s):  
Local Thermodynamic Equilibrium ◽  
Radiation Transport ◽  
Numerical Study ◽  
Plasma Accelerator ◽  
Two Dimensional ◽  
Stationary Flows ◽  
Stationary Plasma ◽  
Hydrogen Ionization ◽  
Gas Supply ◽  
Empirical Condition

Numerical study of the hydrogen ionization process in the channel of the quasi-stationary plasma accelerator is presented. Calculations of pulsating and stationary flows of ionizing hydrogen were carried out within the framework of two-dimensional MHD model in the approximation of local thermodynamic equilibrium, taking into account the radiation transport and under the condition of uniform gas supply at the channel inlet. As a result of a series of calculations, the empirical condition for the stationarity of axisymmetric flows of ionizing hydrogen was determined.

The study of helium ionization process stability in the channel of plasma accelerator

2021 ◽  
pp. 1-24
Author(s):  
Venyamin Sergeevich Konovalov
Keyword(s):  
Numerical Study ◽  
Plasma Accelerator ◽  
Mhd Equations ◽  
Ionization Process ◽  
Gas Flows ◽  
Process Stability ◽  
Multiply Charged ◽  
Integral Characteristics ◽  
The Stability ◽  
Ionizing Gas

Numerical study of the ionization process stability in a flow of ionizing helium in the channel of the quasi-stationary plasma accelerator is presented. The model of two-dimensional axisymmetric flows is based on the modified MHD equations for the multicomponent medium consisting of atoms, electrons, and multiply charged ions with different ionization multiplicity. The numerical model takes into account the electrical conductivity and thermal conductivity. Results of modeling of the ionizing gas flows and the integral characteristics of the radiation are presented. As a result of a series of calculations, the empirical condition for the stability of ionizing helium flows was obtained in terms of the experimentally measured parameters.

scholarly journals The study of radiation transport in a flow of ionizing helium in plasma accelerator

2020 ◽  
pp. 1-27
Author(s):  
Andrey Nikolaevich Kozlov ◽  
Venyamin Sergeevich Konovalov ◽  
Nikolai Sergeyevich Klimov ◽  
Dmitry Vladimirovich Kovalenko ◽  
Vyacheslav Leonidovich Podkovyrov ◽  
...  
Keyword(s):  
Radiation Transport ◽  
Plasma Accelerator

Analysis of Short Pulse Radiation Transport Through Tissues for Tumor Detection

2005 ◽  
Author(s):  
Soumyadipta Basu ◽  
Gopalendu Pal ◽  
Kunal Mitra ◽  
Michael S. Grace
Keyword(s):  
Radiation Transport ◽  
Numerical Study ◽  
Short Pulse ◽  
Optical Detection ◽  
Skin Surface ◽  
Tissue Samples ◽  
Time Resolved ◽  
Detection Scheme ◽  
Scattering Coefficients

The objective of this paper is to perform a comprehensive experimental and numerical study to analyze short pulse laser propagation through animal tissue samples and phantoms with inhomogeneities imbedded in them. Initially a parametric study of different absorption and scattering coefficients of the tissue phantoms and of inhomogeneities imbedded in them, size and location of the inhomogeneities is performed in order to optimize the time resolved optical detection scheme. Tissues can be modeled primarily as having two main layers-skin and the underlying muscle. To study the interaction of light with the tissue layers, experiments are next performed on freshly excised rat tissue samples to validate the time varying optical signatures of rat skin and muscle with the numerical model. The next step is to perform in vivo imaging of anaesthetized rats with tumors injected on the skin as well as below the skin surface in order to test the optical detection scheme. The goal is the detection and characterization of tumors in rats.

Numerical study of the low-frequency atomic dynamics in a Lennard-Jones glass

1998 ◽  
Vol 77 (2) ◽  
pp. 473-484 ◽  
Author(s):  
M. Sampoli, P. Benassi, R. Dell'Anna,
Keyword(s):  
Numerical Study ◽  
Low Frequency ◽  
Lennard Jones
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