Electron beam excitation of a CSRR loaded waveguide for Cherenkov radiation

Emmy Sharples; Rosa Letizia

doi:10.1117/12.2186314

1 September 2015 Electron beam excitation of a CSRR loaded waveguide for Cherenkov radiation

Emmy Sharples, Rosa Letizia

Proceedings Volume 9544, Metamaterials, Metadevices, and Metasystems 2015; 95442L (2015) https://doi.org/10.1117/12.2186314
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Emmy Sharples and Rosa Letizia "Electron beam excitation of a CSRR loaded waveguide for Cherenkov radiation", Proc. SPIE 9544, Metamaterials, Metadevices, and Metasystems 2015, 95442L (1 September 2015); https://doi.org/10.1117/12.2186314

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