NDLI: Compact, high-power Terahertz source using cylindrical gratings

Content Provider	IEEE Xplore Digital Library
Author	Gardelle, Jacques Modin, Patrick Donohue, John T. Bluem, Hans Jarvis, Jonathan Todd, Alan M.M. Jackson, Robert H.
Copyright Year	2014
Description	Author affiliation: Centre d' Etudes Nucleaires de Bordeaux-Gradignan, University of Bordeaux 1, CNRS/IN2P3, BP 120, 33175, France (Donohue, John T.) \|\| CEA/CESTA 33116 Le Barp, France (Gardelle, Jacques; Modin, Patrick) \|\| Greensboro, NC 27455 USA (Jackson, Robert H.) \|\| Advanced Energy Systems, 100E Forrestal Rd., Princeton, NJ, 08540 USA (Bluem, Hans; Jarvis, Jonathan; Todd, Alan M.M.)
Abstract	A promising compact source of high power THz radiation which utilizes an annular electron beam and a cylindrical grating is being studied. The cylindrical grating configuration exhibits substantially enhanced performance in comparison with the classical 2-D planar gratings. In the studied source, the grating surface-wave produces strong beam bunching and generates significant power at the fundamental surface-wave frequency and at harmonics as Smith-Purcell radiation. A collaboration between Advanced Energy Systems and CEA/CESTA has been ongoing in performing proof-of-principle tests on cylindrical grating configurations producing millimeter wave radiation. Testing has been performed with a 6 mm period grating, producing power at the fundamental frequency of 15 GHz, second harmonic power at 30 GHz and although not measured, simulations show meaningful third harmonic power at 45 GHz. To date simulations have been performed at frequencies up to the THz frequency range. Simulations are ongoing using both MAGIC and VORPAL. Comparisons between these two codes will be presented and compared to the experimental results. Additionally, a three dimensional dispersion relation has been developed. A comparison between the dispersion relation and three dimensional simulations shows the potential higher order modes.
Starting Page	1
Ending Page	1
File Size	116278
Page Count	1
File Format	PDF
ISBN	9781479927111
e-ISBN	9781479927135
DOI	10.1109/PLASMA.2014.7012409
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-05-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gratings Harmonic analysis Power system harmonics Surface waves Frequency measurement Dispersion Educational institutions
Content Type	Text
Resource Type	Article

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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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