太赫兹波导中的紧凑型电子加速与束团压缩

Compact electron acceleration and bunch compression in THz waveguides.

作者信息

Wong Liang Jie, Fallahi Arya, Kärtner Franz X

机构信息

Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.

出版信息

Opt Express. 2013 Apr 22;21(8):9792-806. doi: 10.1364/OE.21.009792.

DOI:10.1364/OE.21.009792

PMID:23609686

Abstract

We numerically investigate the acceleration and bunch compression capabilities of 20 mJ, 0.6 THz-centered coherent terahertz pulses in optimized metallic dielectric-loaded cylindrical waveguides. In particular, we theoretically demonstrate the acceleration of 1.6 pC and 16 pC electron bunches from 1 MeV to 10 MeV over an interaction distance of 20mm, the compression of a 1.6 pC 1 MeV bunch from 100 fs to 2 fs (50 times compression) over an interaction distance of about 18mm, and the compression of a 1.6 pC 10 MeV bunch from 100 fs to 1.61 fs (62 times) over an interaction distance of 42 cm. The obtained results show the promise of coherent THz pulses in realizing compact electron acceleration and bunch compression schemes.

摘要

我们通过数值方法研究了能量为20 mJ、中心频率为0.6 THz的相干太赫兹脉冲在优化的金属介质加载圆柱波导中的加速和束团压缩能力。具体而言，我们从理论上证明了1.6 pC和16 pC的电子束团在20mm的相互作用距离上从1 MeV加速到10 MeV，1.6 pC、1 MeV的束团在约18mm的相互作用距离上从100 fs压缩到2 fs（压缩50倍），以及1.6 pC、10 MeV的束团在42 cm的相互作用距离上从100 fs压缩到1.61 fs（压缩62倍）。所得结果表明，相干太赫兹脉冲在实现紧凑型电子加速和束团压缩方案方面具有潜力。