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  • Articles  (2)
  • 41.80.Gg  (2)
  • Springer  (2)
  • American Association for the Advancement of Science (AAAS)
  • SciELO Brazil
  • 2005-2009
  • 1985-1989  (2)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (2)
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  • Articles  (2)
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  • Springer  (2)
  • American Association for the Advancement of Science (AAAS)
  • SciELO Brazil
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  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (2)
  • Physics  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Theoretical investigation of liquid metal ion sources: Field and temperature dependence of ion emission (1986)
    Springer
    Applied physics 41 (1986), S. 157-169 
    Details
    ISSN: 1432-0630
    Keywords: 79.70+q ; 41.80.Gg ; 07.80.+x
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We investigate the field and temperature dependence of the rate of ion formation by important mechanisms in Liquid Metal Ion Sources (LMIS). In addition to field evaporation and field ionization of thermally evaporated neutrals we identify a third mechanism, thermal-field evaporation, which is intermediate between the other two mechanisms. Field (or thermal-field) evaporation is found to be dominant in the normal operating regime of LMIS in agreement with the conclusions of Prewett et al. A jet-like protrusion model of LMIS shape, which is consistent with direct observations, allows high temperatures to be reached with a reasonable power input to the source. Thus a small, but sometimes important, contribution to the total ion current from field ionization of thermally evaporated atoms is expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00631124
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On the mechanism of liquid metal ion sources (1986)
    Springer
    Applied physics 41 (1986), S. 223-232 
    Details
    ISSN: 1432-0630
    Keywords: 79.70.+q ; 41.80.Gg ; 07.80.+x
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have developed a theoretical model of liquid metal ion source operation which consistently explains the shape and size of the ion emitting region, the mechanism of ion formation and properties of the ion beam. We find that field evaporation is the main current generating mechanism and that field evaporation and subsequent postionization produce the doubly and higher charged ions. Field ionization of thermally evaporated neutrals may make a significant, but not dominant, contribution to the current of singly charged ions. Our model is consistent with experimental results on energy spread, energy deficit and charge state ratios and we are able to explain the stability of the emitted ion current.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616843
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    Paper (German National Licenses)
    Fulltext
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