The properties of 2-D photonic bandgap dielectric structures, also called photonic crystals, are numerically investigated to assist the design of waveguides for terahertz (THz)-driven linear electron acceleration. Given the broadband nature of the driving pulses in THz acceleration regimes, one design aim is to maximize the photonic bandgap width to allow propagation of the relevant frequencies within the photonic crystal linear defect waveguide. The proposed design is optimized to provide the best compromise between effective acceleration bandwidth and strong beam-wave interaction at the synchronism central frequency. Considerations on achieved acceleration bandwidth, accelerating voltage, and surface magnetic field are given to compare the proposed geometry to one of the main counterparts in the literature-the dielectric-lined waveguide.

中文翻译：

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用于太赫兹驱动电子加速的 PBG 波导优化


对二维光子带隙介电结构（也称为光子晶体）的特性进行数值研究，以协助设计用于太赫兹 (THz) 驱动的线性电子加速的波导。考虑到太赫兹加速范围内驱动脉冲的宽带特性，一种设计目标是最大化光子带隙宽度，以允许相关频率在光子晶体线性缺陷波导内传播。所提出的设计经过优化，可在有效加速带宽和同步中心频率处的强束波相互作用之间提供最佳折衷。考虑了所实现的加速带宽、加速电压和表面磁场，将所提出的几何结构与文献中的主要对应物之一——介质衬里波导进行比较。