Real-Time Wavefront Control for the PALM-3000High Order Adaptive Optics System

摘要

We present a cost-effective scalable real-time wavefront control architecture based on off-the-shelf graphics processingunits hosted in an ultra-low latency, high-bandwidth interconnect PC cluster environment composed of modules writtenin the component-oriented language of nesC. We demonstrate the architecture is capable of supporting the mostcomputation and memory intensive wavefront reconstruction method (vector-matrix-multiply) at frame rates up to 2KHz with latency under 250 μs for the PALM-3000 adaptive optics systems, a state-of-the-art upgrade on the 5.1 meterHale Telescope that consists of a 64x64 subaperture Shack-Hartmann wavefront sensor and a 3368 active actuator highorder deformable mirror in series with a 349 actuator "woofer" DM. This architecture can easily scale up to supportlarger AO systems at higher rates and lower latency.