Laboratory realization of an Alfvén wave maser.
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.
Maggs
J E
JE
Physics and Astronomy Department, University of California, Los Angeles, Los Angeles, California 90095, USA.
Morales
G J
GJ