SAMOP 2021 – scientific programme

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A: Fachverband Atomphysik

A 12: Highly charged ions and their applications

A 12.2: Poster

Tuesday, September 21, 2021, 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. Laser cooling can also achieve a stronger and faster cooling than electron and stochastic cooling. We will report on recent (May 2021) preliminary results from a laser cooling test beamtime at the ESR at GSI in Darmstadt, Germany. We will also present our plans and progress for laser cooling experiments at FAIR (SIS100).