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Q: Fachverband Quantenoptik und Photonik

Q 46: Lasers I

Q 46.1: Vortrag

Donnerstag, 14. März 2024, 11:00–11:15, HS 3118

High Power UV Laser Systems for Bunched Beam Laser Cooling — •Benedikt Langfeld, Jens Gumm, Tamina Grunwitz, and Thomas Walther — TU Darmstadt, Institut für Angewandte Physik

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 two laser systems that will be used at the SIS100, namely one continuous-wave (cw) laser system and one pulsed picosecond laser system. At the TU Darmstadt, the cw master-oscillator-power-amplifier UV laser system - with two SHG cavities - and the tunable high repetition rate (1-10 MHz) pulsed UV laser system - with a continuously adjustable pulse duration between 50 and 735 ps - are being developed. With these systems, we achieved very high UV output powers of over 2W UV (cw system) and over 4W average power (pulsed system).

Keywords: laser cooling; UV laser; BBO; UV cavity