Elements of a dielectric laser accelerator

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: McNeur J, Kozak M, Schönenberger N, Leedle K, Deng H, Ceballos A, Hoogland H, Ruehl A, Hartl I, Holzwarth R, Solgaard O, Harris J, Byer R, Hommelhoff P
Zeitschrift: arXiv
Jahr der Veröffentlichung: 2016
Band: 4
Heftnummer: 4
ISSN: 2331-8442


The widespread use of high energy particle beams in basic research, medicine and coherent X-ray generation coupled with the large size of modern radio frequency (RF) accelerator devices and facilities has motivated a strong need for alternative accelerators operating in regimes outside of RF. Working at optical frequencies, dielectric laser accelerators (DLAs) - transparent laser-driven nanoscale dielectric structures whose near fields can synchronously accelerate charged particles - have demonstrated high-gradient acceleration with a variety of laser wavelengths, materials, and electron beam parameters, potentially enabling miniaturized accelerators and table-top coherent x-ray sources. To realize a useful (i.e. scalable) DLA, crucial developments have remained: concatenation of components including sustained phase synchronicity to reach arbitrary final energies as well as deflection and focusing elements to keep the beam well collimated along the design axis. Here, all of these elements are demonstrated with a subrelativistic electron beam. In particular, by creating two interaction regions via illumination of a nanograting with two spatio-temporally separated pulsed laser beams, we demonstrate a phase-controlled doubling of electron energy gain from 0.7 to 1.4 keV (2.5 percent to 5 percent of the initial beam energy) and through use of a chirped grating geometry, we overcome the dephasing limit of 25 keV electrons, increasing their energy gains to a laser power limited 10 percent of their initial energy. Further, optically-driven transverse focusing of the electron beam with focal lengths below 200 microns is achieved via a parabolic grating geometry. These results lay the cornerstone for future miniaturized phase synchronous vacuum-structure-based accelerators.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Hommelhoff, Peter Prof. Dr.
Lehrstuhl für Laserphysik
Hoogland, Heinar
Lehrstuhl für Laserphysik
Kozak, Martin
Lehrstuhl für Laserphysik
McNeur, Joshua
Lehrstuhl für Laserphysik
Schönenberger, Norbert
Lehrstuhl für Laserphysik

Einrichtungen weiterer Autorinnen und Autoren

Deutsches Elektronen-Synchrotron DESY
Menlo Systems GmbH
Stanford University


McNeur, J., Kozak, M., Schönenberger, N., Leedle, K., Deng, H., Ceballos, A.,... Hommelhoff, P. (2016). Elements of a dielectric laser accelerator. arXiv, 4(4).

McNeur, Joshua, et al. "Elements of a dielectric laser accelerator." arXiv 4.4 (2016).


Zuletzt aktualisiert 2018-10-08 um 18:08