scholarly journals Numerical analysis of the scaling laws about focused beam spreading induced by the atmosphere

2006 ◽  
Vol 55 (12) ◽  
pp. 6715
Author(s):  
Huang Yin-Bo ◽  
Wang Ying-Jian
Keyword(s):  
Numerical Analysis ◽  
Scaling Laws ◽  
Beam Spreading ◽  
Focused Beam

Influence of density change during melting inside a cavity: Theoretical scaling laws and numerical analysis

2021 ◽  
Vol 173 ◽  
pp. 121260
Author(s):  
Moritz Faden ◽  
Andreas König-Haagen ◽  
Erwin Franquet ◽  
Dieter Brüggemann
Keyword(s):  
Numerical Analysis ◽  
Scaling Laws ◽  
Density Change

Numerical Analysis of Beam Spreading of High-Power Solid Laser Propagation Through Non-Kolmogorov Turbulent Atmosphere

2018 ◽  
Vol 38 (6) ◽  
pp. 0601002
Author(s):  
李玉杰 Li Yujie ◽  
钱仙妹 Qian Xianmei ◽  
朱文越 Zhu Wenyue ◽  
苗锡奎 Miao Xikui
Keyword(s):  
Numerical Analysis ◽  
High Power ◽  
Turbulent Atmosphere ◽  
Beam Spreading ◽  
Laser Propagation ◽  
Solid Laser

Analysis of Scaling Laws for Phase Compensation of Focused Beam under Thermal Blooming Conditions

2012 ◽  
Vol 39 (2) ◽  
pp. 0213002
Author(s):  
张鹏飞 Zhang Pengfei ◽  
范承玉 Fan Chengyu ◽  
乔春红 Qiao Chunhong ◽  
马慧敏 Ma Huimin ◽  
张京会 Zhang Jinghui ◽  
...  
Keyword(s):  
Scaling Laws ◽  
Phase Compensation ◽  
Thermal Blooming ◽  
Focused Beam

Siphon Flows in Stratified Coronal Loops

1994 ◽  
Vol 144 ◽  
pp. 185-187
Author(s):  
S. Orlando ◽  
G. Peres ◽  
S. Serio
Keyword(s):  
Heat Flux ◽  
Scaling Laws ◽  
Flow Model ◽  
Supersonic Flows ◽  
Coronal Loops ◽  
Characteristic Parameters

AbstractWe have developed a detailed siphon flow model for coronal loops. We find scaling laws relating the characteristic parameters of the loop, explore systematically the space of solutions and show that supersonic flows are impossible for realistic values of heat flux at the base of the upflowing leg.

Spatial resolution of X-ray microanalysis in thin foils

1978 ◽  
Vol 36 (1) ◽  
pp. 544-545
Author(s):  
R. Hutchings ◽  
I.P. Jones ◽  
M.H. Loretto ◽  
R.E. Smallman
Keyword(s):  
Spatial Resolution ◽  
Electron Probe ◽  
Beam Divergence ◽  
Inelastic Interaction ◽  
Specimen Thickness ◽  
High Current ◽  
Beam Spreading ◽  
X Ray ◽  
Thin Foils ◽  
Complex Calculation

There is increasing interest in X-ray microanalysis of thin specimens and the present paper attempts to define some of the factors which govern the spatial resolution of this type of microanalysis. One of these factors is the spreading of the electron probe as it is transmitted through the specimen. There will always be some beam-spreading with small electron probes, because of the inevitable beam divergence associated with small, high current probes; a lower limit to the spatial resolution is thus 2αst where 2αs is the beam divergence and t the specimen thickness.In addition there will of course be beam spreading caused by elastic and inelastic interaction between the electron beam and the specimen. The angle through which electrons are scattered by the various scattering processes can vary from zero to 180° and it is clearly a very complex calculation to determine the effective size of the beam as it propagates through the specimen.

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