Multipacting Modes of High-Frequency Gaseous Breakdown

Albert J. Hatch and H. Bartel Williams
Phys. Rev. 112, 681 – Published 1 November 1958
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Abstract

A previously developed average electron theory for the ½-cycle multipacting mode of low-pressure, high-frequency breakdown (secondary electron resonance) has been generalized and extended to higher order modes. A semitheoretical plot of breakdown voltage V vs the product of frequency times electrode separation f×d using representative fitting parameters is given for the ½- through 92-cycle modes. In addition to the customary ½-cycle cutoff the theory predicts a modified cutoff in each of the mode transition regions. Breakdown data for internal metal electrodes at 2 microns pressure show the typical ½-cycle cutoff at about 100 Mc-cm/sec plus a newly observed 32-cycle cutoff as indicated by a dip in the breakdown curve at about 450 Mc-cm/sec. The 32-cycle dip exhibits a strong dependence on electrode surface conditions. The theory is compared with multipacting breakdown data from several sources covering a wide range of conditions, including microwave breakdown at sufficiently low pressures.

  • Received 23 June 1958

DOI:https://doi.org/10.1103/PhysRev.112.681

©1958 American Physical Society

Authors & Affiliations

Albert J. Hatch

  • Argonne National Laboratory, Lemont, Illinois

H. Bartel Williams

  • New Mexico College of Agriculture and Mechanic Arts, State College, New Mexico

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Issue

Vol. 112, Iss. 3 — November 1958

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