✦ LIBER ✦

Modeling and simulation of a powerful terahertz generator based on Cherenkov superradiance

✍ Scribed by Hai Zhang; Jianguo Wang; Chunming Tian

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 862 KB
Volume: 52
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.25019

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✦ Synopsis

Abstract

In this article, the preliminary studies of coherent stimulated terahertz radiation from intense, subnanosecond electron beam are presented. The mechanism of terahertz pulse generation is associated with self‐bunching of the beam and slippage of the wave over the whole electron flow. This so‐called Cherenkov superradiance (SR) was used to propose a compact terahertz generator with high peak power. A large cross section (overmoded), slow wave structure was designed to support the high power handling capability, and the mode competition was avoided by operating the device in the surface wave status. With 2.5D particle‐in‐cell simulation, we investigated the “hot” characteristics of the proposed superradiant terahertz generator and found that the SR peak power could be further increased by optimizing the amplitude profile of electron pulse. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 657–662, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25019

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