Cyclotron maser radiation from an inhomogeneous plasma

R.A. Cairns, I. Vorgul, R. Bingham

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Cyclotron maser radiation is important in both laboratory devices such as gyrotrons and in space physics applications to phenomena such as auroral kilometric radiation. To understand the behavior, especially in the latter case where there is generally a localized region of instability, requires an understanding of how such instabilities behave in an inhomogeneous plasma. Here we consider, for simplicity, a simple ring distribution of electrons in either a step function variation of magnetic field or a continuous gradient. In each case we show that there can exist localized regions of instability from which waves, growing in time, can be radiated outwards.
Original languageEnglish
Article number215003
Number of pages4
JournalPhysical Review Letters
Issue number21
Publication statusPublished - 21 Nov 2008


  • cyclotron maser radiation
  • gyrotrons
  • space physics


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