Sprecher
Beschreibung
The ATLAS-3000 is a Petawatt class Ti:Sa laser located at the Centre for Advanced Laser Applications (CALA) in Munich, Germany. The laser operates at a 1Hz repetition rate and the beam can be guided into several different experiment areas for e.g., laser particle acceleration experiments.
The laser chain contains a total of three deformable mirrors before the main amplification stage, before guiding the beam into the grating compressor and finally in the beamline towards the experiment areas to optimize the focus on target, respectively. The first two mirrors are paired with commercial Phasics wavefront sensors for closed loop operation. Since the final mirror is used for focus optimization in different experiment areas, homemade Shack-Hartmann wavefront sensors based on commercially available microlens arrays were developed both for cost reasons as well as to allow integration into the focus diagnostics operating in vacuum.
A large number of diagnostics both in the laser as well as the experiments are integrated into a central control system based on the open-source Tango controls framework [1]. This allows easier operation by the experimenter and unified data acquisition for offline as well as online evaluation. Currently, the wavefront data measured by the Phasics sensors is available in the control system via the manufacturer supplied Tango module. The homemade Shack-Hartmann sensors are partially integrated but some data is only available within the evaluation software directly. The evaluation routines are available as an open-source Python package on the institute public repository [2].
In this contribution I will review the technical details of the current setup with an emphasis on the integration with the Tango control system and the capabilities of the published Shack-Hartmann evaluation routines. This work was funded by the Bundesministerium für Bildung und Forschung (BMBF) within project 01IS17048.
[1] https://www.tango-controls.org/
[2] https://gitlab.lrz.de/cala-public/packages/physicsbox
