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Gyrotron experiments employing a field emission array cathode

Garven, M and Spark, S N and Cross, A W and Cooke, S J and Phelps, A D R (1996) Gyrotron experiments employing a field emission array cathode. Physical Review Letters, 77 (11). pp. 2320-2323. ISSN 0031-9007

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    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.

    Author(s):Garven, M, Spark, S N, Cross, A W, Cooke, S J and Phelps, A D R
    Item type:Article
    ID code:35584
    Keywords:vacuum microelectronics, field emission array cathode , gyrotrons , Plasma physics. Ionized gases, Physics and Astronomy(all)
    Subjects:Science > Physics > Plasma physics. Ionized gases
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:07 Nov 2011 12:36
    Last modified:05 Jun 2019 01:01
    URI:https://strathprints.strath.ac.uk/id/eprint/35584
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