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Review of Scientific Instruments : Correction of spherical aberration for an electrostatic gridded lens

By Alexander Pikin and Ahovi Kponou

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Book Id: WPLBN0002169690
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 10 December 2008

Title: Review of Scientific Instruments : Correction of spherical aberration for an electrostatic gridded lens  
Author: Alexander Pikin and Ahovi Kponou
Volume: Issue : December 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Review of Scientific Instruments Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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And Ahovi Kponou, A. P. (n.d.). Review of Scientific Instruments : Correction of spherical aberration for an electrostatic gridded lens. Retrieved from http://worldebookfair.com/


Description
Description: Two methods to correct spherical aberration in electrostatic gridded lenses have been studied using ray-tracing simulations. Both methods are based on modifying the electrostatic field on the radial periphery of the lens. In the simplest case, the modification is done by extending the grid support axially. In the second method, the electric field on a radial periphery of the lens is modified by applying optimum voltage on an isolated correcting electrode. It is demonstrated that, for a given focal length, the voltage on this lens can be optimized for minimum aberration, and also that these lenses reduce the emittance growth of the ion beam.

 

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