Phys. Rev. Lett. 91, 035004 (2003) [4 pages]Laboratory Realization of an Alfvén Wave MaserReceived 3 March 2003; published 18 July 2003 It is demonstrated that a frequency selective Alfvén-wave resonator can be realized by applying a nonuniform magnetic field to a plasma region bounded between a cathode and a semitransparent mesh anode. When a current threshold is exceeded, selective amplification results in a highly coherent, large amplitude wave that propagates into an adjacent plasma column. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.035004
DOI:
10.1103/PhysRevLett.91.035004
PACS:
52.40.Db, 52.25.Os, 52.35.Bj, 52.35.Py
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