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Proceedings Paper

Electron beam excitation of a CSRR loaded waveguide for Cherenkov radiation
Author(s): Emmy Sharples; Rosa Letizia
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Paper Abstract

A novel metamaterial structure is presented for applications as a backward propagating Cherenkov source or Cherenkov detector. The structure comprises of a complementary split ring resonator (CSRR) metasurface loaded waveguide, which exhibits left handed behaviour between 5-6 GHz. When the left handed, TM-like mode couples with an incident electron beam, backward propagating Cherenkov radiation is observed. The structure is suitable for beam-based applications, exhibiting strong beam coupling parameters and significant excitation of longitudinal wakefields. Three dimensional particle in cell simulations are performed to identify a suitable beam for operation. High and low energy beams, with different bunch dimensions from the literature, are considered and compared to investigate the nature of the beam-wave interaction this structure can support, and to identify any required modification before beam tests can be performed. This structure can lead to new solutions for non-destructive beam diagnostics, wakefield acceleration and backward wave oscillators which can potentially be scaled to higher frequency ranges.

Paper Details

Date Published: 1 September 2015
PDF: 8 pages
Proc. SPIE 9544, Metamaterials, Metadevices, and Metasystems 2015, 95442L (1 September 2015); doi: 10.1117/12.2186314
Show Author Affiliations
Emmy Sharples, The Cockcroft Institute (United Kingdom)
Lancaster Univ. (United Kingdom)
Rosa Letizia, Lancaster Univ. (United Kingdom)
The Cockcroft Institute (United Kingdom)


Published in SPIE Proceedings Vol. 9544:
Metamaterials, Metadevices, and Metasystems 2015
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

Video Presentation

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