Sep 15 – 21, 2019
Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy
Europe/Rome timezone

THz-driven short period undulators

Sep 16, 2019, 7:00 PM
Parking Area (Hotel Hermitage)

Parking Area

Hotel Hermitage

poster WG4 - Application of compact and high-gradient accelerators Cheese and Wine Poster Session 1


David Rohrbach (University of Bern)


In a variety of electron accelerator based light sources relativistic electron bunches propagate through an undulator and emit intense narrow band radiation. Here, we propose new types of short period undulators, which are based on the alternating electromagnetic field pattern of THz-driven surface plasmon polaritons in sub-wavelength structures. Analytic undulator models are derived and numerical simulations are performed for the undulator fields, the generated wake fields and the emitted radiation. Different undulator structures based on graphene and based on metallic split ring resonators are considered. For a moderate electron beam energy of 100 MeV a 40 mm long undulator is shown to emit narrow band 1 keV X-ray pulses, and therefore has potential for a compact and low cost X-ray source.

Primary authors

David Rohrbach (University of Bern) Zoltan Ollmann (University of Bern) Carl Schroeder (Lawrence Berkeley National Laboratory) Mozhgan Hayati (University of Bern) Roxana Tarkeshian (Universität Bern) Wim Leemans (Lawrence Berkeley National Laboratory) Thomas Feurer (University of Bern)

Presentation materials