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Characteristics of Thermionic Li+ Ion Emission from β-eucryptite
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Type
Academic journal
Author
Dae Sun Choi (Kangwon National University)
Journal
The Korean Vacuum Society Applied Science and Convergence Technology Vol.28 No.4 KCI Excellent Accredited Journal SCOPUS
Published
2019.7
Pages
82 - 87 (6page)
DOI
10.5757/ASCT.2019.28.4.82

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Result
Characteristics of Thermionic Li+ Ion Emission from β-eucryptite
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Abstract· Keywords

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In this study, the Li<SUP>+</SUP> ion emission characteristics of β-eucryptite were investigated. The β-eucryptite Li<SUP>+</SUP> ion source does not exhibit outgassing in an ultra-high vacuum system, even at a high filament temperature, and the purity of the emitted Li<SUP>+</SUP> ion beam is very high. The emitted current densities functions are in good agreement with the Richardson equation and Child-Langmuir model. The energy for Li<SUP>+</SUP> ion to be extracted from a solid to a vacuum was measured to be 1.1 eV. This value means that Li<SUP>+</SUP> ion can be easily extracted from solid to vacuum, i.e., β-eucryptite is a good Li<SUP>+</SUP> ion source. Finally, this study suggests a half-life time and ion current equation as a function of source temperature, source potential, and working time. The suggested equations can be used widely in various fields, including in the design and construction of a Li<SUP>+</SUP> ion source (ion gun), especially for an ion scattering spectroscopy study.
#β-eucryptite #Li< #SUP> #+< #/SUP> # ion #Lifetime

Contents

Abstract
Ⅰ. Introduction
Ⅱ. Experimental details
Ⅲ. Results and discussion
Ⅳ. Conclusions
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