Gyrotron experiments employing a field emission array cathode

M Garven, S N Spark, A W Cross, S J Cooke, A D R Phelps

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The design and operation of a field emission array (FEA) cathode and the subsequent demonstration of the first FEA gyrotron are presented. Up to 10 mA from 30 000 tips was achieved reproducibly from each of ten chips in a gyrotron environment, namely, a vacuum 1 x 10(-8) mbar, -50 kV potential with multiple chip operation, The design parameters of the FEA gun were similar to those of a magnetron injection gun with an achievable electron beam current of 50-100 mA and measured power 720 W cw. Coherent microwave radiation was detected in both TE(02) at 30.1 GHz and TE(03) at 43.6 GHz, with a starting current of 1 mA.

LanguageEnglish
Pages2320-2323
Number of pages4
JournalPhysical Review Letters
Volume77
Issue number11
DOIs
Publication statusPublished - 9 Sep 1996

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field emission
cathodes
chips
beam currents
electron beams
injection
microwaves
vacuum

Keywords

  • vacuum microelectronics
  • field emission array cathode
  • gyrotrons

Cite this

Garven, M ; Spark, S N ; Cross, A W ; Cooke, S J ; Phelps, A D R . / Gyrotron experiments employing a field emission array cathode. In: Physical Review Letters. 1996 ; Vol. 77, No. 11. pp. 2320-2323.
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Gyrotron experiments employing a field emission array cathode. / Garven, M ; Spark, S N ; Cross, A W ; Cooke, S J ; Phelps, A D R .

In: Physical Review Letters, Vol. 77, No. 11, 09.09.1996, p. 2320-2323.

Research output: Contribution to journalArticle

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