Hannover 2013 – scientific programme

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A: Fachverband Atomphysik

A 10: Precision spectroscopy of atoms and ions II (with Q)

A 10.6: Talk

Monday, March 18, 2013, 17:45–18:00, F 428

Broadband lasercooling of relativistic ions at the ESR — •Danyal Winters¹, Colin Clark¹, Christina Dimopoulou¹, Tino Giacomini¹, Christophor Kozhuharov¹, Thomas Kühl^1,2,3, Matthias Lochmann^1,2, Wilfried Nörtershäuser^1,2,4, Fritz Nolden¹, Rodolfo Sanchez^1,2, Shahab Sanjari¹, Markus Steck¹, Thomas Stöhlker^1,3,5, Johannes Ullmann¹, Tobias Beck⁴, Gerhard Birkl⁴, Benjamin Rein⁴, Sascha Tichelmann⁴, Thomas Walther⁴, Xinwen Ma⁶, Weiqiang Wen⁶, Jie Yang⁶, Dacheng Zhang⁶, Ulrich Schramm⁷, Michael Seltmann⁷, Mathias Siebold⁷, and Michael Bussmann⁷ — ¹GSI Darmstadt — ²Uni Mainz — ³HI Jena — ⁴TU Darmstadt — ⁵Uni Jena — ⁶IMP CAS Lanzhou, China — ⁷HZDR Dresden

We present new results on broadband laser cooling of stored relativistic C³⁺ ion beams at the ESR in Darmstadt. For the first time we could show laser cooling of bunched relativistic ion beams using a UV-laser which could scan over a very large range and thus cool all the ions in the ‘bucket’. This scheme is much more versatile than a previous scheme, where the bunching frequency was scanned relative to a fixed laser frequency. We have also demonstrated that this cooling scheme works without pre-electron cooling, which is a prerequisite for its general application to future storage rings and synchrotrons, such as the HESR and the SIS100 at FAIR. We also present results from in vacuo VUV-fluorescence detectors, which have proven to be very effective.