Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Instrumentation VIII

HK 27.5: Talk

Tuesday, March 29, 2022, 17:15–17:30, HK-H4

Laser cooling of C3+ ions at the Experimental Storage Ring at GSI — •Ken Ueberholz¹, Volker Hannen¹, Danyal Winters², Christian Weinheimer¹, Noah Eizenhöfer⁴, Michael Bussmann³, Max Horst⁴, Daniel Kiefer⁴, Nils Kiefer⁵, Sebastian Klammes², Thomas Kühl^2,6, Markus Löser³, Xinwen Ma⁷, Wilfried Nörtershäuser⁴, Rodolfo Sanchez², Ulrich Schramm^3,8, Mathias Siebold³, Peter Spiller², Markus Steck², Thomas Stöhlker^2,6,9, Thomas Walther⁴, Hanbing Wang⁷, Weiqiang Wen⁷, Benedikt Langfeld⁴, and Lars Bozyk² — ¹WWU Münster — ²GSI Darmstadt — ³HZDR Dresden — ⁴TU Darmstadt — ⁵Uni Kassel — ⁶HI Jena — ⁷IMP Lanzhou — ⁸TU Dresden — ⁹Uni Jena

In May 2021, an improved XUV fluorescence detection system and a new tuneable pulsed UV laser system were employed in a *beam experiment* for laser cooling of bunched relativistic (47% of c) carbon ions stored at the Experimental Storage Ring at GSI Helmholtzzentrum Darmstadt. Successful laser cooling was demonstrated using the powerful (~200 mW), high repetition rate (~10 MHz) and tuneable (wavelength and pulse duration) UV laser system. One of the main points of interest was to study the effects of ion bunch and laser pulse timing on the cooling process and on the fluorescence detection, which was done by varying the delay of the laser pulses. In the talk preliminary results of these measurements will be presented and discussed. This work has been supported by BMBF under contract number 05P19PMFA1.