Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 42: Laser and Laser Applications
Q 42.8: Poster
Wednesday, March 16, 2022, 16:30–18:30, P
Novel tunable cw and pulsed UV laser systems for laser cooling of bunched relativistic ion beams — •Jens Gumm1, Benedikt Langfeld1, Daniel Kiefer1, Sebastian Klammes2, and Thomas Walther1 — 1TU Darmstadt — 2GSI Darmstadt
Experiments with highly charged ions at relativistic energies are of great interest for many atomic and nuclear physics experiments at accelerator facilities. To decrease the longitudinal momentum spread and emittance, laser cooling has proven to be a powerful tool.
In this work, we present two UV-laser systems operating at 257.25 nm for ion beam cooling at ESR in Darmstadt. The first laser is a Fourier limited, pulsed master-oscillator-power-amplifier system with individually adjustable pulse duration from 50 ps to 735 ps and repetition rates between 1 MHz to 10 MHz for broadband laser cooling in order to reduce ion beam heating due to intrabeam scattering. The second laser is a cw system that can be scanned mode-hop free, via two SHG stages, over 20 GHz (50 Hz scan rate). It will be used to minimize the final ion beam momentum spread and, therefore, the ion bunch length. For the cw system, we aim to achieve a power of 1 Watt in the UV-regime.