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Characteristics of a fast neutral atom source with electrons injected into the source through its emissive grid from the vacuum chamber

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Abstract

In order to increase the equivalent current of a fast neutral atom beam the cold hollow cathode of the beam source is bombarded with electrons extracted from the plasma produced in the vacuum chamber and accelerated in the sheath between the plasma emitter of the source and its emissive grid. The cold cathode bombardment by accelerated electrons raises its electron emission current by an order of magnitude and as a result voltage U c between the anode and the cathode of the source diminishes more than two times. This allows of increasing several times the beam equivalent current or decreasing the working gas pressure. A slight decrease in the U c with increasing the accelerating voltage U at an overall cutoff of the electrons from the chamber reveals the influence of secondary electrons emitted by the grid. Measurement of the beam current is discussed.

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Authors and Affiliations

  1. Moscow State University of Technology “Stankin,”, Vadkovskii per. 3a, Moscow, 127994, Russia

    A. S. Metel, S. N. Grigoriev, Yu. A. Melnik & V. P. Bolbukov

Authors
  1. A. S. Metel
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  2. S. N. Grigoriev
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  3. Yu. A. Melnik
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  4. V. P. Bolbukov
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Corresponding author

Correspondence to A. S. Metel.

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Original Russian Text © A.S. Metel, S.N. Grigoriev, Yu.A. Melnik, V.P. Bolbukov, 2012, published in Pribory i Tekhnika Eksperimenta, 2012, No. 2, pp. 149–154.

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Metel, A.S., Grigoriev, S.N., Melnik, Y.A. et al. Characteristics of a fast neutral atom source with electrons injected into the source through its emissive grid from the vacuum chamber. Instrum Exp Tech 55, 288–293 (2012). https://doi.org/10.1134/S0020441212010186

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  • DOI: https://doi.org/10.1134/S0020441212010186

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