title: Laboratory realization of an Alfvén wave maser.
abstract: 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.
authors.affiliation: Physics and Astronomy Department, University of California, Los Angeles, Los Angeles, California 90095, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Maggs
authors.forename: G J
authors.initials: GJ
authors.lastname: Morales