SAMOP 2023 – scientific programme

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A: Fachverband Atomphysik

A 20: Poster II

A 20.19: Poster

Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof

Integration of a nano-Foil Target Positioning System for High-Power Laser Ion Acceleration — •Vitus Magin, Laura D. Geulig, Erin G. Fitzpatrick, Maximilian J. Weiser, Veronika Kratzer, and Peter G. Thirolf — Ludwig-Maximilians-Universität München

Over the last years, the laser-based acceleration of heavy ions has reached increasing interest due to their unique beam properties like very short bunch duration and ultra-high particle density [1]. At the High Field (HF) beamline at the Centre for Advanced Laser Applications (CALA) in Garching the acceleration of gold ions using the ATLAS3000 laser is investigated. A major prerequisite for the acceleration of gold ions is the precise positioning of the a few 10 to few 100 nm thin foils in the laser focus. For this, the nano-Foil Target Positioning System (nFTPS) was developed for the Laser-Driven ION (LION) beamline at CALA [2], offering a 5µm precision needed due to the short Rayleigh length of the laser. At HF this system is currently implemented, replacing the tedious task to register the precise positions manually with the required accuracy. Here, we report on the current progress of the related upgrade. For this, a new microscope for x-y positioning and a confocal sensor are set up, soon enabling an autonomous 30 minute routine for all 760 targets which also corrects for imperfections caused by the mounting of the 19 target holders.

[1] D. Habs et al., Appl. Phys. B 103, 471-484 (2011) [2] Y. Gao et al., HPLSE 5, e12 (2017)