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A: Fachverband Atomphysik

A 21: Highly charged ions and their applications

A 21.2: Poster

Mittwoch, 16. März 2022, 16:30–18:30, P

Laser cooling of stored relativistic bunched ion beams at the ESR — •Sebastian Klammes^1,2, Lars Bozyk¹, Michael Bussmann³, Noah Eizenhöfer², Volker Hannen⁴, Max Horst², Daniel Kiefer², Nils Kiefer⁵, Thomas Kühl^1,6, Benedikt Langfeld², Xinwen Ma⁷, Wilfried Nörtershäuser², Rodolfo Sánchez¹, Ulrich Schramm^3,8, Mathias Siebold³, Peter Spiller¹, Markus Steck¹, Thomas Stöhlker^1,6,9, Ken Ueberholz⁴, Thomas Walther², Hanbing Wang⁷, Weiqiang Wen⁷, Daniel Winzen⁴, and Danyal Winters¹ — ¹GSI Darmstadt — ²TU Darmstadt — ³HZDR Dresden — ⁴Uni Münster — ⁵Uni Kassel — ⁶HI Jena — ⁷IMP Lanzhou — ⁸TU Dresden — ⁹Uni-Jena

At heavy-ion storage rings, almost all experiments strongly benefit from cooled ion beams, i.e. beams which have a small longitudinal momentum spread and a small emittance. During the last two decades, laser cooling has proven to be a powerful tool for relativistic bunched ion beams, and its "effectiveness" is expected to increase further with the Lorentz factor (γ). The technique is based on resonant absorption (of photon momentum & energy) in the longitudinal direction and subsequent spontaneous random emission (fluorescence & ion recoil) by the ions, combined with moderate bunching of the ion beam. We will report on recent (May 2021) preliminarily results from a laser cooling beam experiment at the ESR at GSI in Darmstadt, Germany, where broadband laser cooling of a relativistic ion beam could be successfully demonstrated for the first time using a pulsed UV laser system with a high rep.-rate, variable pulse lengths and high UV power.