Investigating the momentum balance of a plasma pinch: An air-side stereoscopic imaging system for locating probes

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T. P. Intrator ◽  
Y. Feng ◽  
H. O. Swan ◽  
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2006 ◽  
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Kyung-Hoon Cha ◽  
Min-Chul Park ◽  
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Optik ◽  
2018 ◽  
Vol 156 ◽  
pp. 914-920
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Kenji Harada ◽  
Toshiki Matsuzaki ◽  
Huangyi Qin

2014 ◽  
Author(s):  
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...  

Author(s):  
Willem H.J. Andersen

Electron microscope design, and particularly the design of the imaging system, has reached a high degree of perfection. Present objective lenses perform up to their theoretical limit, while the whole imaging system, consisting of three or four lenses, provides very wide ranges of magnification and diffraction camera length with virtually no distortion of the image. Evolution of the electron microscope in to a routine research tool in which objects of steadily increasing thickness are investigated, has made it necessary for the designer to pay special attention to the chromatic aberrations of the magnification system (as distinct from the chromatic aberration of the objective lens). These chromatic aberrations cause edge un-sharpness of the image due to electrons which have suffered energy losses in the object.There exist two kinds of chromatic aberration of the magnification system; the chromatic change of magnification, characterized by the coefficient Cm, and the chromatic change of rotation given by Cp.


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