Pushing FIERA to its Limits Reiss et al., We Must be MAD Roland Reiss, Andrea Balestra, Claudio Cumani, Christoph Geimer, Javier Reyes, Enrico Marchetti, Joana Santos European Southern Observatory (http://www.eso.org) Karl-Schwarzschild-Str. 2 D-85748 Garching by Munich, Germany SDW 2005, Taormina Reiss et al., We Must be MAD

We Must be MAD Pushing FIERA to its Limits MAD (Multi conjugate Adaptive optics Demonstrator) employs 5 CCDs in total 3 CCDs for Shack-Hartmann Wavefront Sensing (SHWFS) 2 CCDs for Layer-Oriented Wavefront Sensing (LOWFS) SDW 2005, Taormina Reiss et al., We Must be MAD

Reiss et al., We Must be MAD SHWFS vs. LOWFS Mode SHWFS: 3 CCDs same frame rate same binning factor 12 video channels (625 kpix/sec each) window 64x64 per CCD LOWFS: 2 CCDs, frame rate ratios of 2:1 and 4:1 binning factors (2x2 and 4x4) 8 video channels (625 kpix/sec each) Window 80x80 per CCD SDW 2005, Taormina Reiss et al., We Must be MAD

Mechanical Constraints Limited head size (96 x 68 x 30 mm3) High flexibility of electrical connections required Peltier cooled CCD39-01bi from e2v SDW 2005, Taormina Reiss et al., We Must be MAD

Reiss et al., We Must be MAD Performance (SHWFS) Frame rate 400 Hz (64 x192 pixels). Average pixel rate 4.9 Mpixel/sec. Burst pixel rate 7.5 Mpixel/sec. Noise @ 400Hz approx. 6 e-RMS. SDW 2005, Taormina Reiss et al., We Must be MAD