Calculation of the radiation loss profile and the integral radiation power of the plasma cord

2020 ◽  
Author(s):  
D. N. Rotman ◽  
V. I. Radchenko
Keyword(s):  
Radiation Power ◽  
Radiation Loss ◽  
Integral Radiation

scholarly journals A method for calculating the radiation power coefficients of black and gray bodies with dimensions commensurable with the radiated wavelengths

2021 ◽  
pp. 57-62
Keyword(s):  
Significant Contribution ◽  
Radiation Power ◽  
Black Body ◽  
The Body ◽  
Round Hole ◽  
Cutoff Wavelength ◽  
Integral Radiation ◽  
Absolutely Black Body ◽  
Square Hole

A technique is proposed and the calculations of the dependences of the emissivity of an abso-lute black body (BBB) on the size of the diaphragms of the emitting aperture are performed for hypothetical cases when the sizes of the diaphragms are commensurate with the emitted wavelengths, and the diaphragms are made of a dielectric opaque for radiation. The value of the cutoff wavelength  = 1.772A for the square aperture of the diaphragm was determined, where A is the side of the square and  = 1. 571D for the round hole. where D is the hole di-ameter, i.e. it is shown that the body cannot emit wavelengths λ greater than 1.772A in the case of a square hole and 1.571D in the case of a round hole. It is shown that if the “cut off” wavelengths made any significant contribution to the integral radiation of a blackbody with temperature T at standard diaphragm diameters (i.e., at diameters of much larger radiated wavelengths), then the emissivity of this body becomes less than unity and rapidly decreases when the size of the diaphragms is commensurate with . In these cases, such a body ceases to be an absolutely black body and the laws of Planck and Stefan–Boltzmann cannot be used to calculate the power of its radiation, but the technique proposed in this work can be used.

QUANTITATIVE ESTIMATION OF THE SOLAR RADIATION LOSS IN BRASOV AREA

2009 ◽  
Vol 8 (4) ◽  
pp. 843-847 ◽  
Author(s):  
Maria Valentina Dinicu(Popa) ◽  
Ion Visa ◽  
Dorin Valentin Diaconescu ◽  
Bogdan Gabriel Burduhos
Keyword(s):  
Solar Radiation ◽  
Quantitative Estimation ◽  
Radiation Loss

Influence of a radial inhomogeneity of the active medium on the output radiation power from a cw CO2 laser with fast axial flow

1996 ◽  
Author(s):  
Michail G. Galushkin ◽  
Vladimir S. Golubev ◽  
V. V. Dembovetsky ◽  
Yuri N. Zavalov ◽  
Valentina Y. Zavalova
Keyword(s):  
Active Medium ◽  
Co2 Laser ◽  
Radiation Power ◽  
Axial Flow ◽  
Output Radiation ◽  
Radial Inhomogeneity ◽  
Cw Co2 Laser ◽  
Output Radiation Power

Limitation of optical radiation power by organic molecules: II. Porphyrins and phthalocyanines

2004 ◽  
Vol 34 (2) ◽  
pp. 139-146 ◽  
Author(s):  
Rimma T Kuznetsova ◽  
T N Kopylova ◽  
G V Mayer ◽  
L G Samsonova ◽  
Valerii A Svetlichnyi ◽  
...  
Keyword(s):  
Optical Radiation ◽  
Organic Molecules ◽  
Radiation Power

scholarly journals Parametric Study on Microwave-Assisted Pyrolysis Combined KOH Activation of Oil Palm Male Flowers Derived Nanoporous Carbons

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2876
Author(s):  
Napat Kaewtrakulchai ◽  
Kajornsak Faungnawakij ◽  
Apiluck Eiad-Ua
Keyword(s):  
Microwave Radiation ◽  
Oil Palm ◽  
Radiation Power ◽  
Operating Time ◽  
Bet Surface Area ◽  
Koh Activation ◽  
Nanoporous Carbons ◽  
Microwave Assisted ◽  
Activating Agent ◽  
Male Flowers

Oil palm male flowers (PMFs), an abundant agricultural waste from oil palm plantation in Thailand, have been utilized as an alternative precursor to develop nanoporous carbons (NPCs) via microwave-assisted pyrolysis combined potassium hydroxide (KOH) activation. The influences of relevant processing variables, such as activating agent ratio, microwave power, and activation time on the specific pore characteristics, surface morphology, and surface chemistry of PMFs derived nanoporous carbons (PMFCs) have been investigated to explore the optimum preparation condition. The optimum condition under a microwave radiation power of 700 W, activation holding time of 6 min, and activating agent ratio of 2:1 obtained the PMFC with the highest Brunauer–Emmett–Teller (BET) surface area and total pore volume approximately of 991 m2/g and 0.49 cm3/g, composed of a carbon content of 74.56%. Meanwhile, PMFCs have a highly microporous structure of about 71.12%. Moreover, activating agent ratio and microwave radiation power indicated a significant influence on the surface characteristics of PMFCs. This study revealed the potential of oil palm male flowers for the NPCs’ production via microwave-assisted KOH activation with a short operating-time condition.

Microwave source with enhanced radiation power based on orbitron MASERs

2020 ◽  
Vol 15 (01) ◽  
pp. P01016-P01016
Author(s):  
A.H. Esmaeili ◽  
S. Matlou ◽  
A. Rostam ◽  
K. Goudarzi
Keyword(s):  
Radiation Power ◽  
Microwave Source
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