ERROR ANALYSIS FOR A HIGH-PRECISION FIVE DEGREE OF FREEDOM HYBRID MECHANISM FOR HIGH-POWER HIGH-REPETITION RATE LASER OPERATIONS

摘要

To take advantage of high-power lasers for fusion energy applications, large-scale facilities need to operate at high repetition rates. The challenge of positioning and aligning a target at the laser focus with an accuracy of few micrometres (typically ±4 μm) is significant, but it is a fundamental requirement for a high-power laser interaction to ensure that targets are reproducibly accessible to the highest intensities available [1]. This represents a serious problem for a high-repetition rate laser system in which a fresh target has to be positioned and aligned at the laser focus at a rate of at least 0.1 Hz (with plans for 10 Hz or higher in future). To meet the specifications for target positioning accuracy and target surface quality, the Central Laser Facility (CLF) has designed and developed a new high-accuracy microtargetry system (HAMS) for accurate mounting and motion control of targets for the Astra-Gemini laser [2].