Vibrations in MagAO: frequency-based analysis of on-sky data, resonance sources identification, and future challenges in vibrations mitigation

• Main Authors: Zúñiga, Sebastián, Garcés, Javier, Close, Laird M., Males, Jared R., Morzinski, Katie M., Escárate, Pedro, Castro, Mario, Marchioni, José, Zagals, Diego
• Other Authors: Univ Arizona, Dept Astron, CAAO
• Language: en
• Published: SPIE-INT SOC OPTICAL ENGINEERING 2016
• Subjects: Adaptive Optics; vibration in AO control; frequency-based analysis; Magellan AO System
• Online Access: Sebastián Zúñiga ; Javier Garcés ; Laird M. Close ; Jared R. Males ; Katie M. Morzinski ; Pedro Escárate ; Mario Castro ; José Marchioni and Diego Zagals " Vibrations in MagAO: frequency-based analysis of on-sky data, resonance sources identification, and future challenges in vibrations mitigation ", Proc. SPIE 9909, Adaptive Optics Systems V, 99093L (July 27, 2016); doi:10.1117/12.2232676; http://dx.doi.org/10.1117/12.2232676; http://hdl.handle.net/10150/622052; http://arizona.openrepository.com/arizona/handle/10150/622052

Frequency-based analysis and comparisons of tip-tilt on-sky data registered with 6.5 Magellan Telescope Adaptive Optics (MagAO) system on April and Oct 2014 was performed. Twelve tests are conducted under different operation conditions in order to observe the influence of system instrumentation (such as fans, pumps and louvers). Vibration peaks can be detected, power spectral densities (PSDs) are presented to reveal their presence. Instrumentation-induced resonances, close-loop gain and future challenges in vibrations mitigation techniques are discussed.