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TY - UNPB AU - Klammes, S. AU - Bozyk, L.H.J. AU - Bussmann, M.H. AU - Chen, D.Y. AU - Eizenhöfer, N. AU - Hannen, V. AU - Horst, M. AU - Huang, Z. AU - Kiefer, N. AU - Kühl, T. AU - Langfeld, B. AU - Ma, X. AU - Nörtershäuser, W. AU - Sanchez Alarcon, R.M. AU - Schramm, U. AU - Siebold, M. AU - Spiller, P.J. AU - Steck, M. AU - Stöhlker, T. AU - Ueberholz, K. AU - Walther, T. AU - Wang, H.B. AU - Wen, W.Q. AU - Winters, D.F.A. ED - Tranquille, Gérard Alain ED - Schaa, Volker RW ED - Petit-Jean-Genaz, Christine ED - Jørgensen, Lars Varming TI - Laser Cooling of Stored Bunched Relativistic Carbon Ions at the ESR, using a Novel Tunable High Repetition Rate Pulsed Laser System J2 - presented at COOL2023, Montreux, Switzerland, 08-13 October 2023 CY - Montreux, Switzerland T2 - International Workshop on Beam Cooling and Related Topics T3 - 14 LA - english AB - Laser cooling at storage rings has proven to be a powerful technique to obtain ion with a very small relative longitudinal momentum spread (1E-6 range). This contribution will give an overview of the principle and status of bunched beam laser cooling at the experimental storage ring ESR at GSI, Germany. Results from a recent laser cooling beamtime in May 2021 at the ESR will be presented, where broadband laser cooling of bunched relativistic C³⁺ ion beams was successfully demonstrated for the first time using a sophisticated pulsed UV laser system with a very high repetition rate (~ MHz), variable pulse durations (166 - 735 ps) and high UV power (> 250 mW). ER -