NDLI: Observation of copious emission at the fundamental frequency by a smith-purcell free-electron laser with sidewalls

Content Provider	IEEE Xplore Digital Library
Author	Gardelle, J. Modin, P. Donohue, J.T.
Copyright Year	2012
Description	Author affiliation: Centre d'Etudes Nucléaires de Bordeaux-Gradignan, Université Bordeaux 1, CNRS/IN2P3, BP 120, 33175, France (Donohue, J.T.) \|\| CEA, CESTA, F-33114 Le Barp, France (Gardelle, J.; Modin, P.)
Abstract	Summary form only given. A three-dimensional simulation using the Particle-in-cell code “MAGIC” predicted that for a grating with sidewalls, copious emission of coherent Smith-Purcell (SP) radiation at the fundamental frequency of the evanescent surface wave would occur $^{1}.$ This may be contrasted with the two-dimensional theory proposed by Andrews and Brau (AB) some years ago $^{2},$ for which emission could only occur at harmonics of that frequency. In order to validate this prediction we have performed a demonstration experiment in the microwave domain, using the same set-up as in our previous confirmation of the AB theory $^{3},$ except that the grating has sidewalls only four cm apart. We observed a forward-moving beam of SP radiation at the predicted frequency after reflection by a plane mirror, since the true emission is in the backward direction, which makes it hard to observe. Agreement with the PIC simulations is satisfactory.
File Size	69444
File Format	PDF
ISBN	9781457721274
ISSN	07309244
e-ISBN	9781457721298
e-ISBN	9781457721281
DOI	10.1109/PLASMA.2012.6383830
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-08
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gratings Laser beams Free electron lasers Solid modeling Predictive models Surface waves Harmonic analysis
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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