Dresden 2026 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 11: Plasma Accelerators, Diagnostics II
AKBP 11.3: Vortrag
Mittwoch, 11. März 2026, 17:00–17:15, SCH/A117
Patch-MLP-Based Predictive Control: Simulation with an Upstream Pointing Stabilization for PHELIX Laser System — •Jiaying Wang1, Jonas Benjamin Ohland3, Yen-Yu Chang4, Vedhas Pandit1, Stefan Bock1, Andrew-Hiroaki Okukura6, Udo Eisenbarth3, Arie Irman1, Michael Bussmann1, Ulrich Schramm1,2, and Jeffrey Kelling1,5 — 1HZDR, Dresden,Germany — 2Technische Universität Dresden, Dresden, Germany — 3GSI Helmholtzzentrum für Schwerionenforschung, Germany — 4Amplitude laser group - Dresden operations, Germany — 5Chemnitz University of Technology, Chemnitz, Germany — 6Extreme Light Infrastructure - Nuclear Physics, National Institute for Physics and Nuclear Engineering, Ilfov, Romania
High-energy laser facilities such as PHELIX at GSI require excellent beam-pointing stability to ensure reproducibility and reliable operation. Conventional PID control mitigates slow drift but is fundamentally limited by diagnostic latency and mirror inertia. We introduce a predictive control scheme in which beam-pointing errors are forecast using a patch-based multilayer perceptron, and the predicted errors are converted into correction signals via a PID controller. This feed-forward strategy compensates for system delay and is trained directly on diagnostic time-series data. Simulations with an upstream correction mirror at the PHELIX pre-amplifier bridge show reduced residual jitter compared with conventional PID control. Across a 10-hour dataset, the predictive controller remained drift-free and improved pointing metrics by approximately 10%-20%.
Keywords: high-power laser stabilization; beam pointing jitter; predictive control; patch-based multilayer perceptron; PHELIX laser system