Modeling of the interaction of a volumetric metallic metamaterial structure with a relativistic electron beam
Name
PhysRevSTAB.18.081303.pdf
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2.25 MB
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Adobe PDF
Checksum (MD5)
4ec3c2010bc3d267e0bf12bb94993264
Author(s)
Lu, Xueying
Temkin, Richard J.
Shapiro, Michael
Date Issued
August 2015
Journal
Physical Review Special Topics - Accelerators and Beams
Publisher
American Physical Society
Citation
Lu, Xueying, Michael A. Shapiro, and Richard J. Temkin. "Modeling of the interaction of a volumetric metallic metamaterial structure with a relativistic electron beam." Phys. Rev. ST Accel. Beams 18, 081303 (August 2015).
Version
Final published version
Abstract
We present the design of a volumetric metamaterial (MTM) structure and its interaction with a relativistic electron beam. This novel structure has promising applications in particle beam diagnostics, acceleration, and microwave generation. The volumetric MTM has a cubic unit cell allowing structures of arbitrary size to be configured as an array of identical cells. This structure allows the exploration of the properties of a metamaterial structure without having to consider substrates or other supporting elements. The dispersion characteristics of the unit cell are obtained using eigenmode simulations in the hfss code and also using an effective medium theory with spatial dispersion. Good agreement is obtained between these two approaches. The lowest-order mode of the MTM structure is found to have a negative group velocity in all directions of propagation. The frequency spectrum of the radiation from a relativistic electron beam passing through the MTM structure is calculated analytically and also calculated with the cst code, with very good agreement. The radiation pattern from the relativistic electron beam is found to be backward Cherenkov radiation, which is a promising tool for particle diagnostics. Calculations are also presented for the application of a MTM-based wakefield accelerator as a possible all-metal replacement for the conventional dielectric wakefield structure. The proposed structure may also be useful for MTM-based vacuum electron devices for microwave generation and amplification.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/PhysRevSTAB.18.081303
