Phys. Rev. Lett. 42, 1617–1620 (1979)m=1 Cyclotron-Mode Klystron InstabilityReceived 12 March 1979; published in the issue dated 11 June 1979 The transverse beam breakup instability, for a uniform axial focusing magnetic field, has been investigated utilizing the approach of the well-known klystron instability. An expression for the gain is obtained. It is proportional to the beam current and the cavity equivalent shunt resistivity at the radius of the beam surface and inversely proportional to the cyclotron frequency and the cavity frequency, resulting in instability at high beam current, in contrast to the standard klystron instability which occurs at low currents and is self-stabilized at high beam currents. © 1979 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.42.1617
DOI:
10.1103/PhysRevLett.42.1617
PACS:
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