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Unheated magnetron gun as an electron source for a resonant linear accelerator

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Abstract

Investigations of the operation of a cold-cathode magnetron gun as part of a traveling-wave linear accelerator are described. Two operating regimes of the gun are observed: with and without the microwave field of the prebuncher near the gun. In the regime with no microwave field, short (around 2 ns) pulses of accelerated electrons of up to 0.5A were obtained with a gun current up to 20 A. The presence of a microwave field near the gun makes it possible to obtain a beam of longer duration (up to 1.0 µs), but with a current of up to 20mA at the accelerator exit and 1A from the gun. The operating mechanism of the gun is attributed to a secondary-electron current rise and the establishment of self-sustained secondary emission. A comparison between the conditions of beam production from a thermionic gun and that studied for the same injection energies indicates that the characteristics of this gun are acceptable for injection into an accelerator.

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Authors and Affiliations

  1. National Science Center, Institute of Physics and Technology, 310108, Kharkov, Ukraine

    G. M. Ivanov, L. A. Makhnenko & S. A. Cherenshchikov

Authors
  1. G. M. Ivanov
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  2. L. A. Makhnenko
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  3. S. A. Cherenshchikov
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Additional information

Zh. Tekh. Fiz. 69, 130–134 (July 1999)

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Ivanov, G.M., Makhnenko, L.A. & Cherenshchikov, S.A. Unheated magnetron gun as an electron source for a resonant linear accelerator. Tech. Phys. 44, 855–859 (1999). https://doi.org/10.1134/1.1259365

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  • DOI: https://doi.org/10.1134/1.1259365

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