Millimeter wave emission from a rotating electron ring in a rippled magnetic field
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We report measurements of millimeter wave emission from a rotating relativistic electron ring (2 MY, 1 kA) in which electrons move in quasi-circular orbits under the combined action of a uniform axial magnetic field and an azimuthally periodic wiggler magnetic field. We observe radiation at frequencies above 91 GHz, at power levels in excess of 200 kW.
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