Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster VIII

Q 57.6: Poster

Thursday, March 14, 2024, 17:00–19:00, Aula Foyer

Tunability of a Pulsed UV Laser System for Laser Cooling of Relativistic Bunched Ion Beams — •Tamina Grunwitz, Benedikt Langfeld, and Thomas Walther — Technische Universität Darmstadt

The usage of laser cooling as the only cooling method at FAIR’s new synchrotron SIS100 promises a narrow momentum distribution of the relativistic bunched ion beams. In order to address a wide range of ion velocities, the pulsed laser system used for cooling must have the ability to be tunable at the cooling wavelength in the UV region.

In this contribution, we present our tunable pulsed laser system at a center wavelength of 257 nm. For tunability of the whole system, the seed wavelength can be tuned over a range of 3 nm around the center wavelength of 1030 nm. To ensure that this change in wavelength is converted to the UV region at maximum performance, both angle adjustments of the fiber amplifiers ASE filters and phase matching of the second SHG stage (critical phase matching) must be automated. In this work, we will present recent progress on these automations and their performance.

Keywords: laser cooling; UV laser system; BBO; tunable