Darmstadt 2016 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 3: Injectors, Laser II
AKBP 3.6: Vortrag
Montag, 14. März 2016, 17:45–18:00, S1/05 23
Efficient Acceleration Using Single-cycle THz pulses — •Arya Fallahi1, Moein Fakhari1, Alireza Yahaghi1, and Franz Kärtner1,2,3,4 — 1Center for Free-Electron Laser Science, DESY, Notkestrasse 85, 22607 Hamburg, Germany — 2Department of Physics, University of Hamburg, Jungiusstrasse 9, 20355 Hamburg, Germany — 3The Hamburg Center for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany — 4Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
Novel structures for electron acceleration are introduced which operate with single-cycle pulses. Due to the considered excitation, the new types of guns are named as single-cycle ultrafast guns. The operating frequencies considered here are at THz wavelengths inspired by the recent progress in the optical generation of intense single-cycle THz pulses. Two distinct regimes, namely low energy and high energy THz pulses are considered. It is theoretically demonstrated that the proposed electron guns have potentials to provide 30 fs electron bunches at 30 keV energies and 100 fs bunches at 2MeV energies. More importantly, it is shown that the already achieved THz pulse energies of 20 uJ are enough to realize relativistic acceleration gradients. These structures will underpin future devices for fabricating miniaturized electron guns and linear accelerators.