Speaker
Description
The development of a compact electron accelerator is presented as part of the TWAC (Terahertz Wave Accelerating Cavity) EIC pathfinder project. To reduce the footprint, the project proposes to accelerate the electrons with a 100 MV/m THz travelling wave propagating inside a hollow cylindrical dielectric waveguide. In such a case, particle acceleration depends heavily on the dispersion properties of the waveguide. In particular the phase velocity of the THz wave, driven by the dielectric waveguide properties, must match the velocity of the electrons. We will present prototypes of waveguides, and phase velocity measurements of fundamental HE11 and higher order modes obtained from a vector network analyzer (VNA). The experimental curves are compared with CST simulations and with analytical models. Based on these results, waveguides will be selected to carry out the first THz acceleration measurement campaigns with the PHIL photoinjector in early 2026.
Funding Agency
This project has received funding from the European Union’s Horizon Europe research and innovation programme under grant agreement N° 101046504.
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