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Q: Fachverband Quantenoptik und Photonik
Q 1: Laser Technology and Applications (joint session Q/K)
Q 1.3: Vortrag
Montag, 10. März 2025, 11:30–11:45, HS V
Transportable Pulsed UV Laser System for Bunched Beam Laser Cooling — •Benedikt Langfeld1,2, Tamina Grunwitz1, and Thomas Walther1,2 — 1TU Darmstadt, Institut für Angewandte Physik — 2HFHF Campus Darmstadt
Laser cooling of bunched relativistic ion beams has been shown (e.g. at GSI Helmholtzzentrum) to be a powerful technique to generate ion beams with small emittances and narrow longitudinal velocity distributions. For highly relativistic (large γ-factors) and intense heavy-ion beams, laser cooling will be very efficient and cooling times of the order of seconds are expected. For these reasons, laser cooling will be the only available cooling method at the planned heavy-ion synchrotron SIS100 at FAIR.
In this talk, we discuss the principle of bunched beam laser cooling using multiple laser beams. We will give an overview of one of the laser systems that will be used at the SIS100, namely the tunable high repetition rate (1-10 MHz) pulsed UV laser system - with a continuously adjustable pulse duration between 50 and 735 ps and a high average UV power of up to 4 W. Employing a walk-off compensation design with two BBO crystals, the laser frequency can be tuned over a range of 3.4 THz in the UV.
Keywords: laser cooling; UV laser; BBO; walk-off compensation