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Determination of the critical ionization distance and ionization zone during high-temperature field evaporation of molybdenum

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Abstract

Steady-state field evaporation of molybdenum at high emitter temperatures (T ∼ 2000 K) has been studied using a magnetic mass spectrometer equipped with a field ion source. Only low-charge ions (Mo+2 and Mo+) have been observed in the course of evaporation. The measured ion energies and evaporating field strengths (F ev) were used to determine the critical ionization distances (x cr) and ionization zones (Δ) for singly and doubly charged ions. The obtained x cr and Δ values show that the formation of ions takes place at a certain distance from the emitter surface.

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Authors and Affiliations

  1. Ioffe Physical Technical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia

    N. M. Blashenkov & O. L. Golubev

Authors
  1. N. M. Blashenkov
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  2. O. L. Golubev
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Correspondence to O. L. Golubev.

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Original Russian Text © N.M. Blashenkov, O.L. Golubev, 2016, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2016, Vol. 42, No. 14, pp. 80–86.

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Blashenkov, N.M., Golubev, O.L. Determination of the critical ionization distance and ionization zone during high-temperature field evaporation of molybdenum. Tech. Phys. Lett. 42, 754–757 (2016). https://doi.org/10.1134/S106378501607018X

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  • DOI: https://doi.org/10.1134/S106378501607018X

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