Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

Parts | Days | Selection | Search | Updates | Downloads | Help

AKBP: Arbeitskreis Beschleunigerphysik

AKBP 15: Bestowal of Prizes

AKBP 15.2: Invited Talk

Thursday, March 19, 2020, 15:45–16:15, MOL 213

Electron Beam Dynamics in Dielectric Laser Accelerators on a Microchip — •Uwe Niedermayer — Schlossgartenstrasse 8, 64289 Darmstadt

The Accelerator on a Chip International Program (ACHIP) aims at demonstrating a laser-driven dielectric microstructure accelerator to reach energy gains in excess of 1 MeV for both sub-relativistic and relativistic electron sources. Dielectric-laser acceleration (DLA) provides gradients about an order of magnitude higher than conventional RF accelerators, presumably the highest among breakdown-limited (non-plasma) particle accelerators. In order to turn these impressive gradients into a functioning accelerator, a full six-dimensional phase space confinement scheme is required. In this talk, various types of DLA structures and descriptions of the electromagnetic fields therein are introduced. Then, an accelerator structure design procedure based on Alternating Phase Focusing (APF) is shown to make DLA completely scalable, i.e., the final energy is only limited by the available laser power. As recently experimentally demonstrated, DLA structures can also be used to attain bunching on the attosecond scale, where an APF approach allows to significantly reduce the energy spread. Moreover, APF-based electron transport through arbitrary long DLA structures is experimentally addressed. In the future, we plan to change the laser coupling from free space to an on-chip integrated waveguide system. Applications are, e.g., in ultrafast electron microscopy and -diffraction and we also plan to introduce DLAs to large-scale electron accelerator facilities as energy modulators.