Göttingen 2025 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: Novel Accelerator Concepts I

AKBP 2.1: Group Report

Tuesday, April 1, 2025, 13:45–14:15, ZHG004

Energy Compression of a Laser-Plasma Accelerator — •Paul Winkler¹, Max Trunk¹, Lars Hübner¹, Alberto Martinez de la Ossa¹, Sören Jalas¹, Manuel Kirchen¹, Ilya Agapov¹, Sergey A. Antipov¹, Reinhard Brinkmann¹, Timo Eichner¹, Angel Ferran Pousa¹, Thomas Hülsenbusch¹, Guido Palmer¹, Matthias Schnepp², Kaja Schubert¹, Maxence Thévenet¹, Paul A. Walker¹, Christian Werle¹, Wim P. Leemans^1,2, and Andreas R. Maier¹ — ¹Deutsches Elektronen Synchrotron, DESY — ²Universität Hamburg

Laser-Plasma accelerators (LPAs) promise a compact alternative to modern RF-technology, and support orders of magnitude higher electric fields. GeV-energy LPA electron beams from cm-scale sources have been demonstrated. However, the central energy jitter and energy spread, both on the percent-level, have yet prevented LPAs to drive real-world applications.

Here, we present active energy compression of laser-plasma accelerated electron beams. At the LUX experiment at DESY, a dipole chicane stretches the beams in time and thereby imprints an energy-time correlation (a chirp), which is subsequently removed inside an RF cavity. Our setup reduces the fluctuation in central energy as well as the energy spread of the beams by more than an order of magnitude down to the permille-level. We demonstrate performance so far only attributed to modern RF based accelerators which opens the door for a variety of applications, such as compact plasma-based injectors for synchrotron storage rings.

Keywords: laser-plasma acceleration; particle injector; synchrotron ring