Radiation absorption coefficients in arc plasmas

2004 ◽  
Vol 54 (S3) ◽  
pp. C759-C765 ◽  
Author(s):  
V. Aubrecht ◽  
M. Bartlová
Keyword(s):  
Radiation Absorption ◽  
Absorption Coefficients ◽  
Arc Plasmas

scholarly journals Gamma?Radiation Absorption Coefficients of Various Materials Allowing for Bremsstrahlung and Other Secondary Radiations

1961 ◽  
Vol 14 (4) ◽  
pp. 443 ◽  
Author(s):  
JW Allison
Keyword(s):  
Absorption Coefficient ◽  
Energy Loss ◽  
Basic Assumption ◽  
Radiation Energy ◽  
Radiation Absorption ◽  
Annihilation Radiation ◽  
Total Absorption ◽  
Absorption Coefficients ◽  
Radiation Energy Loss ◽  
Total Absorption Coefficient

Existing calculations of the total absorption coefficient are generally based on the assumption that all the primary radiation energy which is converted into Comptonscattered radiation escapes from the material without significant absorption. This paper extends this basic assumption to include fluorescent and annihilation radiation and bremsstrahlung, and new values of the photoelectric, Compton, pair production, and total absorption coefficients are determined in the energy range O� 01-100 MeV for hydrogen, nitrogen, oxygen, argon, aluminium, iron, lead, air, and water. For comparison purposes revised values of the total absorption coefficient, allowing for the Compton radiation energy loss only, are also determined for these materials, using the most recent data for the component coefficients.

scholarly journals METHOD FOR MEASURING LINEAR GAMMA RADIATION ABSORPTION COEFFICIENTS AT THE ELEKTA AXESSE MEDICAL ACCELERATOR BEAM

REPORTS ◽  
2021 ◽  
Vol 5 (339) ◽  
pp. 126-135
Author(s):  
Y.A. Zaripova ◽  
T.M. Gladkikh ◽  
M.T. Bigeldiyeva ◽  
V.V. Dyachkov ◽  
A.V. Yushkov
Keyword(s):  
Gamma Radiation ◽  
Radiation Absorption ◽  
Absorption Coefficients

scholarly journals Approximate Determination of Radiation Properties in the Arc Plasmas With Admixtures of Copper Vapours

2019 ◽  
Vol 6 (3) ◽  
pp. 265-269
Author(s):  
N. Bogatyreva ◽  
M. Bartlová ◽  
V. Aubrecht ◽  
P. Kloc
Keyword(s):  
Spherical Harmonics ◽  
Thermal Plasma ◽  
Radiation Transfer ◽  
Approximate Determination ◽  
Absorption Coefficients ◽  
First Order ◽  
Radiation Properties ◽  
Arc Plasmas ◽  
The Way

The aim of this paper is to evaluate radiation properties of air arc plasmas with various admixtures of copper vapours. The first order of the method of spherical harmonics (P<sub>1</sub>-approximation) has been used as the way to solve the equation of radiation transfer. Calculations of the absorption coefficients for a thermal plasma have been performed as a function of the temperature and the frequency. The frequency variable in the equation of transfer was handled by means of multigroup method. Methods for prediction of the average absorption coefficients were described and compared in detail. The net emission coefficients have been determined for comparison.

scholarly journals Radiation Transfer in Arc Plasmas

2017 ◽  
Vol 4 (3) ◽  
pp. 253-256
Author(s):  
N. Bogatyreva ◽  
M. Bartlová ◽  
V. Aubrecht ◽  
P. Kloc
Keyword(s):  
Thermal Plasma ◽  
Radiation Transfer ◽  
Arc Plasma ◽  
Absorption Coefficients ◽  
Absorption Properties ◽  
Arc Plasmas

In this paper, attention has been given to the absorption properties of the arc plasma at the different pressure conditions. Calculations of the absorption coefficients for a thermal plasma have been performed as a function of the temperature and the frequency. Methods for prediction of the average absorption coefficients were described and compared in detail.

scholarly journals Multigroup Approximation of Radiation Transfer in SF6 Arc Plasmas

10.14311/1719 ◽  
2013 ◽  
Vol 53 (2) ◽  
Author(s):  
Milada Bartlova ◽  
Vladimir Aubrecht ◽  
Nadezhda Bogatyreva ◽  
Vladimir Holcman
Keyword(s):  
Frequency Dependence ◽  
Spherical Harmonics ◽  
Radiation Transfer ◽  
Absorption Coefficients ◽  
Averaging Methods ◽  
First Order ◽  
Temperature Range ◽  
Cylindrical Plasma ◽  
Radiation Properties ◽  
Arc Plasmas

The first order of the method of spherical harmonics (P1-approximation) has been used to evaluate the radiation properties of arc plasmas of various mixtures of SF6 and PTFE ((C2F4)n, polytetrafluoroethylene) in the temperature range (1000 ÷ 35 000) K and pressures from 0.5 to 5 MPa. Calculations have been performed for isothermal cylindrical plasma of various radii (0.01 ÷ 10) cm. The frequency dependence of the absorption coefficients has been handled using the Planck and Rosseland averaging methods for several frequency intervals. Results obtained using various means calculated for different choices of frequency intervals are discussed.

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