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We Must be MAD Pushing FIERA to its Limits

We Must be MAD Pushing FIERA to its Limits 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.

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We Must be MAD Pushing FIERA to its Limits

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

  2. We Must be MADPushing 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) Reiss et al., We Must be MAD

  3. 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 Reiss et al., We Must be MAD

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

  5. 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. Reiss et al., We Must be MAD

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