Explosive beam spreading due to ray chaos

1999 ◽  
Vol 106 (4) ◽  
pp. 2225-2225 ◽  
Author(s):  
Frederick Tappert
Keyword(s):  
Beam Spreading ◽  
Ray Chaos

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.

scholarly journals Design of 100-MeV proton beam spreading scheme with double-ring double scattering method

2019 ◽  
Vol 68 (5) ◽  
pp. 054104
Author(s):  
Jin-Hua Han ◽  
Gang Guo ◽  
Jian-Cheng Liu ◽  
Li Sui ◽  
Fu-Quan Kong ◽  
...  
Keyword(s):  
Proton Beam ◽  
Scattering Method ◽  
Double Scattering ◽  
Beam Spreading ◽  
Double Ring

Anatomical substrates for cerebellar computational units and cerebellar magnification factors

1997 ◽  
Vol 20 (2) ◽  
pp. 246-247
Author(s):  
Jan G. Bjaalie ◽  
Per Brodal
Keyword(s):  
Body Representation ◽  
Body Parts ◽  
Beam Spreading ◽  
Sequential Processing ◽  
Anatomical Data ◽  
Magnification Factors ◽  
Linear Body

We discuss anatomical data that may represent the substrate for very diverse input to a single folium, indirectly supporting the notion of a laterolateral beam spreading along the long axis of a folium. We also raise the question of whether the more linear body representation in somatosensory cortico-ponto-cerebellar pathways represent an adaptation to sequential processing of information from contiguous body parts.

scholarly journals Ray chaos in optical cavities based upon standard laser mirrors

2003 ◽  
Vol 68 (4) ◽  
Author(s):  
A. Aiello ◽  
M. P. van Exter ◽  
J. P. Woerdman
Keyword(s):  
Optical Cavities ◽  
Ray Chaos ◽  
Standard Laser
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