Oct 25 – 27, 2021
Dresden
Europe/Berlin timezone

Fully Isolated Targets for High Power Laser Interaction applying a Paul Trap

Oct 27, 2021, 11:10 AM
25m
Dresden

Dresden

Helmholtz-Zentrum Dresden-Rossendorf Bautzner Landstraße 400 01328 Dresden Germany

Speaker

Johannes Gebhard (Ludwig-Maximilians-Universität München, Department of Medical Physics, Faculty of Physics, Am Coulombwall 1, 85748 Garching b. München, Germany)

Description

We will give an update on the current developments on our target positioning system for levitating, isolated micro spheres. The Paul trap system is specifically designed to ensure functionality at high-power laser systems. Active damping enables reliable overlap of the micrometer-sized target with the micrometer-sized laser focus.
The complete target system can now be fully remote controlled. These improvements enabled repetition rates of the order of one shot every 10-15 minutes, mainly limited by the time required for inserting and retracting the microscope for imaging target and laser focal spot.
We recently performed experiments at the ZEUS laser at the Centre for Advanced Laser Applications, a 5 TW Ti:Sa laser system, for laser plasma expansion studies at intensities of 10¹⁶ W/cm². These studies were prerequisites for experiments at the JETi 200 laser at the Helmholtz Institute in Jena, where plasma expansion was initiated by a similarly strong, artificially introduced pre-pulse for studying the effect on ion acceleration from microscopic spherical targets at reduced density.

Primary author

Johannes Gebhard (Ludwig-Maximilians-Universität München, Department of Medical Physics, Faculty of Physics, Am Coulombwall 1, 85748 Garching b. München, Germany)

Co-authors

Martin Speicher (Ludwig-Maximilians-Universität München, Department of Medical Physics, Faculty of Physics, Am Coulombwall 1, 85748 Garching b. München, Germany) Felix Balling (Ludwig-Maximilians-Universität München, Department of Medical Physics, Faculty of Physics, Am Coulombwall 1, 85748 Garching b. München, Germany) Joey Kalis (Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany) Dr Alexander Sävert (Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany) Dr Peter Hilz (Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany) Prof. Matt Zepf (Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany) Prof. Jörg Schreiber (Ludwig-Maximilians-Universität München, Department of Medical Physics, Faculty of Physics, Am Coulombwall 1, 85748 Garching b. München, Germany)

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