SMuK 2023 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 5: Hadron Accelerators
AKBP 5.1: Talk
Tuesday, March 21, 2023, 16:30–16:45, CHE/0184
Broadband laser cooling of stored relativistic bunched ion beams at the ESR — •Sebastian Klammes1, Lars Bozyk1, Michael Bussmann2,3, Noah Eizenhöfer4, Volker Hannen5, Max Horst4, Daniel Kiefer4, Nils Kiefer6, Thomas Kühl1,7, Benedikt Langfeld4,9, Xinwen Ma8, Wilfried Nörtershäuser4,9, Rodolfo Sánchez1, Ulrich Schramm3,10, Mathias Siebold2, Peter Spiller1, Markus Steck1, Thomas Stöhlker1,7,11, Ken Ueberholz5, Thomas Walther4,9, Hanbing Wang8, Weiqiang Wen8, Daniel Winzen5, and Danyal Winters1 — 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 relative longitudinal momentum spread (Δp/p) and a small emittance (є). Especially for the higher ion intensities and Lorentz factors (γ) at FAIR (SIS100), laser cooling has proven to be a powerful tool for cooling of relativistic bunched ion beams. The principle is based on resonant absorption (photon momentum & energy) in the longitudinal direction and subsequent spontaneous random emission (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, where we could demonstrate for the first time broadband laser cooling of relativistic bunched C3+ ions using a new pulsed UV laser system with a very high repetition rate, tunable pulse duration, and high power.