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Proceedings Paper

Adaptive optics at the PHELIX laser
Author(s): Hans-Martin Heuck; Ulrich Wittrock; Jérôme Fils; Stefan Borneis; Klaus Witte; Udo Eisenbart; Dasa Javorkova; Vincent Bagnoud; Stefan Götte; Andreas Tauschwitz; Eckehard Onkels
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Paper Abstract

GSI Darmstadt currently builds a high-energy petawatt Nd:glass laser system, called PHELIX (Petawatt High-Energy Laser for Heavy-Ion Experiments). PHELIX will offer the world-wide unique combination of a high current, high-energy heavy-ion beam with an intense laser beam. Aberrations due to the beam transport and due to the amplification process limit the focusability and the intensity at the target. We have investigated the aberrations of the different amplification stages. The pre-amplifier stage consists of three rod-amplifiers which cause mainly defocus, but also a small part of coma and astigmatism. The main amplifier consists of five disk amplifiers with a clear aperture of 315 mm. These large disk-amplifiers cause pump-shot aberrations which occur instantly. After a shot, the disk amplifiers need a cooling time of several hours to relax to their initial state. This limits the repetition rate and causes long-term aberrations. We will present first measurements of the pump-shot and long-term aberrations caused by the pre- and the main amplifier in a single-pass configuration. In this context, we will present the adaptive optics system which is implemented in the PHELIX beam line and discuss its capability to compensate for the pump-shot and long-term aberrations.

Paper Details

Date Published: 16 May 2007
PDF: 12 pages
Proc. SPIE 6584, Adaptive Optics for Laser Systems and Other Applications, 658402 (16 May 2007); doi: 10.1117/12.723380
Show Author Affiliations
Hans-Martin Heuck, Münster Univ. of Applied Sciences (Germany)
Ulrich Wittrock, Münster Univ. of Applied Sciences (Germany)
Jérôme Fils, Gesellschaft für Schwerionenforschung mbH (Germany)
Stefan Borneis, Gesellschaft für Schwerionenforschung mbH (Germany)
Klaus Witte, Gesellschaft für Schwerionenforschung mbH (Germany)
Udo Eisenbart, Gesellschaft für Schwerionenforschung mbH (Germany)
Dasa Javorkova, Gesellschaft für Schwerionenforschung mbH (Germany)
Vincent Bagnoud, Gesellschaft für Schwerionenforschung mbH (Germany)
Stefan Götte, Gesellschaft für Schwerionenforschung mbH (Germany)
Andreas Tauschwitz, Gesellschaft für Schwerionenforschung mbH (Germany)
Eckehard Onkels, Gesellschaft für Schwerionenforschung mbH (Germany)

Published in SPIE Proceedings Vol. 6584:
Adaptive Optics for Laser Systems and Other Applications
Gilles Cheriaux; Chris J. Hooker; Michal Stupka, Editor(s)

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