| 摘要 |
Disclosed is a drift tube formed of a hollow cylindrical conductive element having a having an inner surface and a pair of ends. A periodic grating surface is formed on the inner surface of the hollow cylindrical element and the ends are radiused to minimize electrical stress buildup. The interaction between a relativistic electron beam from an electron source passing through the inner space of the hollow element and the internal grating produces RF radiation by the Smith-Purcell Effect. Spacing, face angle and shape of the grating, and the energy of the electron bean are determinants of the frequency of the RF radiation.
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