Stimulated coherent Smith-Purcell radiation from a metallic grating

• Published in: IEEE journal of quantum electronics Vol. 35; no. 10; pp. 1386 - 1389
• Main Authors: Chuan Sheng Liu, Tripathi, V.K.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.1999; Institute of Electrical and Electronics Engineers
• Subjects: Arrayed waveguide gratings; Arrays; Beam currents; Beams (radiation); Cherenkov radiation; Current measurement; Electromagnetic measurements; Electromagnetic waveguides; Electromagnetism; electron and ion optics; Electron beams; Exact sciences and technology; Excitation; Fundamental areas of phenomenology (including applications); Goniometers; Instability; Periodic structures; Phase measurement; Phased arrays; Physics; Radiation by moving charges; Thresholds; Wavelength measurement; Wavelengths; Wavenumber; Cherenkov radiation; Electron beams; Coherent radiation; Relativistic electron; Instability; Smith Purcell effect; Experimental study

A relativistic electron beam with velocity /spl nu//sub b/z passing over a metallic grating, with deep periodic depressions of wavenumber k/sub 0/z, excites a slow wave (/spl omega/, k/sub z/) via Cerenkov interaction, /spl omega/=(k/sub z/+k/sub 0/)/spl nu//sub b/. The beam bunches induce currents...