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Persistent URL
http://purl.org/net/epubs/work/34047835
Record Status
Checked
Record Id
34047835
Title
Group Velocity Matching in Dielectric-Lined Waveguides and its Role in Electron-THz Interaction
Contributors
AL Healy (Cockcroft Inst., and Lancaster Univ.)
,
G Burt (Cockcroft Inst., and Lancaster Univ.)
,
SP Jamison (STFC Daresbury Lab.)
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. Presented here is an analysis of the effect of waveguide dispersion on THz-electron interaction and its influence on structure dimensions and choice of THz pulse generation. This effect on net acceleration is demonstrated via an example of a structure excited by a single-cycle THz pulse, with a comparison of multi-cycle, lower intensity THz pulses on net acceleration.
Organisation
ASTeC
,
CI
,
STFC
Keywords
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Language
English (EN)
Type
Details
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Year
Paper In Conference Proceedings
In 8th International Particle Accelerator Conference (IPAC'17), Copenhagen, Denmark, 14-19 May 2017, (2017): 3296-3298.
http://accelconf.…/papers/wepva019.pdf
2017
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