Final published version
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Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
}
TY - GEN
T1 - Group Velocity Matching in Dielectric-Lined Waveguides and its Role in Electron-THz Interaction
AU - Healy, Alisa
AU - Burt, Graeme Campbell
AU - Jamison, Steven
PY - 2017/6/20
Y1 - 2017/6/20
N2 - 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.
AB - 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.
KW - electron
KW - acceleration
KW - simulation
KW - accelerating-gradient
KW - interface
U2 - 10.18429/JACoW-IPAC2017-WEPVA019
DO - 10.18429/JACoW-IPAC2017-WEPVA019
M3 - Conference contribution/Paper
SN - 9783954501823
SP - 3296
EP - 3298
BT - IPAC2017 Proceedings
A2 - Schaa, Volker R.W.
A2 - Arduini, Gianluigi
A2 - Pranke, Juliana
A2 - Seidel, Mike
A2 - Lindroos, Mats
PB - JACoW
CY - Geneva
ER -