Healy, A. L. and Burt, G. and Jamison, S. P. (2017) Group velocity matching in terahertz-driven dielectric-lined waveguides for electron acceleration. In: 2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, UCMMT 2017. 2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, UCMMT 2017 . Institute of Electrical and Electronics Engineers Inc., GBR. ISBN 9781538627204
Full text not available from this repository.Abstract
Terahertz(THz)-driven dielectric-lined waveguides have applications in electron manipulation, particularly acceleration, as the use of dielectric allows for phase velocities below the speed of light. However matching a single frequency to the correct velocity does not maximise electron-THz interaction; waveguide dispersion typically results in an unmatched group velocity and so the pulse envelope of a short THz pulse changes along the length of the structure. This reduces field amplitude and therefore accelerating gradient as the envelope propagates at a different velocity to the electron. The effect on net acceleration is demonstrated via an example of a structure excited by a THz pulse of different temporal lengths.