SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 13: Highly Charged Ions and their Applications I

A 13.5: Vortrag

Mittwoch, 8. März 2023, 12:15–12:30, F107

Broadband laser cooling of stored relativistic bunched ion beams at the ESR — •Danyal Winters¹, Lars Bozyk¹, Michael Bussmann^2,3, Noah Eizenhöfer⁴, Volker Hannen⁵, Max Horst^4,9, Daniel Kiefer⁴, Nils Kiefer⁶, Sebastian Klammes¹, Thomas Kühl^1,7, Benedikt Langfeld^4,9, Xinwen Ma⁸, Wilfried Nörtershäuser^4,9, Rodolfo Sánchez¹, Ulrich Schramm^2,10, Mathias Siebold², Peter Spiller¹, Markus Steck¹, Thomas Stöhlker^1,7,11, Ken Ueberholz⁵, Thomas Walther^4,9, Hanbing Wang⁸, Weiqiang Wen⁸, and Daniel Winzen⁵ — ¹GSI Darmstadt — ²HZDR Dresden — ³CASUS Görlitz — ⁴TU Darmstadt — ⁵Uni Münster — ⁶Uni Kassel — ⁷HI Jena — ⁸IMP Lanzhou — ⁹HFHF Darmstadt — ¹⁰TU Dresden — ¹¹Uni-Jena

High-precision experiments at heavy-ion storage rings strongly benefit from cold ion beams, i.e. beams with a small longitudinal momentum spread and a small emittance. Especially for the higher ion intensities and Lorentz factors (γ) at FAIR (SIS100), laser cooling will be a powerful tool for cooling of relativistic bunched ion beams. The principle is based on resonant photon absorption (momentum & energy) in the longitudinal direction and subsequent spontaneous fluorescence (ion recoil) by the ions, combined with a moderate bunching of the ion beam. We will report on results from a 2021 laser cooling beamtime at the ESR. We could demonstrate - for the first time - broadband laser cooling of stored relativistic bunched ion beams, using a new pulsed UV laser system with a very high repetition rate (MHz), tunable pulse length, and high power.