Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 44: Laser Technology and Applications
Q 44.2: Vortrag
Donnerstag, 5. März 2026, 11:15–11:30, P 2
Tunable Pulsed UV Laser System for Laser Cooling of Relativistic Bunched Ion Beams — •Tamina Grunwitz1,2, Benedikt Langfeld1,2, and Thomas Walther1,2 — 1TU Darmstadt — 2HFHF Campus Darmstadt
In contrast to established cooling methods (e.g. electron cooling), laser cooling promises to efficiently generate narrow longitudinal momentum distributions in relativistic bunched ion beams, even at large gamma factors. Therefore, laser cooling is the only planned cooling method for the upcoming heavy-ion synchrotron SIS100 at the FAIR facility, using three laser systems simultaneously.
In this talk, we present one of these laser systems, which delivers optical pulses with adjustable durations between 46 and 734 ps at repetition rates from 1 to 10 MHz. The systems achieves the high power output required for the laser cooling applications. By employing second-harmonic generation, the system can operate at wavelengths of both 514 nm and 257 nm, with maximum average output powers of 34 W (green) and 5 W (UV), respectively. Additionally, the system can be tuned continuously in its frequency over a range of 3.4 THz in the UV, making the laser system also suitable for laser spectroscopy applications.
Keywords: Pulsed UV Laser; BBO; laser cooling; frequnecy tuning