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Detecting singly charged ions during field evaporation of tantalum at high temperatures

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Abstract

The field evaporation of tantalum from point emitters in a broad range of temperatures from T = 300 to 2500 K was studied using a static magnetic mass spectrometer equipped with a special field ion source. The room-temperature mass spectrum of field-evaporated particles displayed only the peaks of triply charged ions (Ta3+). As the temperature was increased, the charge of field-evaporated ions exhibited a decrease: at T ∼ 1000 K, the peaks of doubly charged ions (Ta2+) prevailed. The peaks of singly charged ions (Ta+) were detected for the first time at temperatures in the interval 1900 K < T < 2500 K. The rate of evaporation of singly charged tantalum ions was several orders of magnitude lower than that of doubly charged ions.

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Authors and Affiliations

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

    N. M. Blashenkov, O. L. Golubev & G. Ya. Lavrent’ev

Authors
  1. N. M. Blashenkov
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  2. O. L. Golubev
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  3. G. Ya. Lavrent’ev
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Additional information

Original Russian Text © N.M. Blashenkov, O.L. Golubev, G.Ya. Lavrent’ev, 2006, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2006, Vol. 32, No. 20, pp. 45–51.

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Blashenkov, N.M., Golubev, O.L. & Lavrent’ev, G.Y. Detecting singly charged ions during field evaporation of tantalum at high temperatures. Tech. Phys. Lett. 32, 889–891 (2006). https://doi.org/10.1134/S1063785006100221

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  • DOI: https://doi.org/10.1134/S1063785006100221

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