Linearized field theory of a Smith-Purcell traveling wave tube
Linearized field theory of a Smith-Purcell traveling wave tube
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DOI：
10.1109/tps.2004.827612
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发表时间：
2004-08
影响因子：
1.5
通讯作者：
H. P. Freund;T. Abuelfadl
中科院分区：
文献类型：
--
作者：
H. P. Freund;T. Abuelfadl
本文提出了光栅耦合Smith-Purcell行波管的线性化场理论。该配置描述了磁化的片状电子束通过平行板波导的传播，其中波导的两个相对面由1）一对相同的衍射光栅（称为双侧配置）或2）沿沿着一个面的衍射光栅和沿沿着相对面的平板（称为单侧配置）组成。这是一个二维公式，因为我们假设的配置是均匀的方向平行于光栅中的槽。对于这些配置中的每一个，我们推导出的真空结构和波粒相互作用的线性色散方程在无限强磁场的限制和任意（螺线管）磁场。基于相位捕获参数的提取效率的讨论也被提出。本文讨论了W波段Smith-Purcell行波管的一个例子。
A linearized field theory of a grating-coupled Smith-Purcell traveling-wave tube (TWT) is presented. The configuration describes the propagation of a magnetized, sheet electron beam through a parallel-plate waveguide in which two opposing faces of the waveguide consists of either 1) a pair of identical diffraction gratings (referred to as a double-sided configuration) or 2) a diffraction grating along one face and a flat plate along the opposing face (referred to as a single-sided configuration). This is a two-dimensional formulation since we assume the configuration is uniform in the direction parallel to the slots in the grating. For each of these configurations, we derive the linearized dispersion equations for the vacuum structures and the wave-particle interaction in both the infinitely strong magnetic field limit and for an arbitrary (solenoidal) magnetic field. A discussion of the extraction efficiency based on phase-trapping arguments is also presented. An example of a W-band Smith-Purcell TWT is discussed.