Phys. Rev. Lett. 87, 158301 (2001) [4 pages]Observation of Stimulated Emission at High Gyroharmonics: Basis for a Synchrotron Resonance MaserReceived 16 April 2001; published 25 September 2001 First experimental observations are reported on stimulated coherent synchrotron radiation from highly relativistic electrons in a strong magnetic field. The experiment employed a quasioptical millimeter-wave resonator and a 6-MeV electron beam gyrating in a field of up to 25 kG. Coherent radiation at 54 GHz, corresponding to the 11th gyroharmonic, was observed and characterized. These observations demonstrate the possibility of a synchrotron resonance maser. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.158301
DOI:
10.1103/PhysRevLett.87.158301
PACS:
84.40.Ik, 41.60.Ap
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