期刊
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
卷 15, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevSTAB.15.081304
关键词
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资金
- Defense Threat Reduction Agency [HDTRA1-10-1-0051]
- Fermilab Research Fellowship program under the Department of Energy [DE-AC02-07CH11359]
- Fermi Research Alliance, LLC.
An electron bunch passing through a dielectric-lined waveguide generates Cerenkov radiation that can result in a high-peak axial electric field suitable for acceleration of a subsequent bunch. Axial fields beyond gigavolt-per-meter are attainable in structures with sub-mm sizes depending on the achievement of suitable electron bunch parameters. A promising configuration consists of using a planar dielectric structure driven by flat electron bunches. In this paper we present a three-dimensional analysis of wakefields produced by flat beams in planar dielectric structures thereby extending the work of Tremaine, Rosenzweig, and Schoessow, Phys. Rev. E 56, 7204 (1997)] on the topic. We especially provide closed-form expressions for the normal frequencies and field amplitudes of the excited modes and benchmark these analytical results with finite-difference time-domain particle-in-cell numerical simulations. Finally, we implement a semianalytical algorithm into a popular particle-tracking program thereby enabling start-to-end high-fidelity modeling of linear accelerators based on dielectric-lined planar waveguides.
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