Smith-Purcell radiation is the name given to the radiation produced when a charged particle beam, usually electrons, passes close to the surface of a metallic grating. The wavelength of the emitted radiation depends on the period of the grating and on the angle of observation. This makes this phenomenon a very useful tuneable source of radiation in the far-infrared (or THz) part of the spectrum, where tuneable sources are scarce. Moreover, a spectral analysis of the radiation can be used to reconstruct the time profile of the very short (picosecond or sub-picosecond) electron bunches that gave rise to this radiation. This is a parameter that is of interest to accelerator designers and users.

The book is aimed primarily at experimentalists but starts with a relatively simple theoretical description of the origin of this radiation and then discusses its application either as a beam diagnostic tool or as a tuneable source of THz radiation. There is also a brief overview of other THz sources in order to allow the reader to assess the advantages of Smith-Purcell radiation.

About the Author

George Doucas, Research Lecturer Emeritus, University of Oxford

George Doucas was, until his retirement, a Research Lecturer in the Department of Physics, University of Oxford. His research interests were centred on the physics and applications of particle accelerators and particle beams, with particular emphasis on the development of suitable techniques for the determination of the properties of a particle beam. Apart from these areas, he has also worked on the Sudbury Neutrino Observatory (SNO) project as a member of the Oxford team. He is the author of numerous papers on these topics.

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