Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 27: Ultracold collisions (jointly with Q)
A 27.7: Vortrag
Freitag, 23. März 2007, 12:15–12:30, 6G
Laser cooling of relativistic C3+ beams at the ESR — •M. Bussmann1, U. Schramm2, D. Habs3, M. Steck3, T. Kühl3, P. Beller3, B. Franzke3, F. Nolden3, T. Stöhlker3, W. Nörtershäuser3, C. Geppert5, S. Reinhardt4, S. Karpuk5, and C. Novotny5 — 1Department f. Physik, Ludwig-Maximilians-Universität München, Garching — 2Forschungszentrum Dresden Rossendorf, Dresden — 3Gesellschaft f. Schwerionenforschung, Darmstadt — 4Max-Planck-Institut für Kernphysik, Heidelberg — 5Institut für Physik, Johannes-Gutenberg-Universität Mainz, Mainz
We report on new results for laser cooling of bunched C3+ beams at the ESR stored at an energy of 1.46 GeV. We observe a longitudinal momentum spread one order of magnitude smaller compared to conventional electron cooling.
Using a setup of two cw Ar+ lasers, one at a fixed frequency, the other constantly detuned with respect to the first, we were able to increase the momentum acceptance of the laser force compared to recent experiemnts [1]. If laser cooling is assisted by moderate electron cooling 3D cold beams can be achieved.
The focus of the talk lies on the dynamical aspects of the transition from temperature dominated beams to space charge dominated beams.
[1] U. Schramm, M. Bussmann, D. Habs, M. Steck, T. Kühl, P. Beller, B. Franzke, F. Nolden, G. Saathoff, S. Reinhardt, S. Karpuk, AIP Conf. Proceedings 821 (2006), 501-509