Its a Mad, Mad, Mad, Mad World Wide Web Stafford Kendall Principal, Covalent Logic.
We Must be MAD Pushing FIERA to its Limits
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Transcript of We Must be MAD Pushing FIERA to its Limits
SDW 2005, Taormina Reiss et al., We Must be MAD 1
We Must be MADPushing 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
SDW 2005, Taormina Reiss et al., We Must be MAD 2
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 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
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Mechanical Constraints
• Limited head size (96 x 68 x 30 mm3)
• High flexibility of electrical connections required
• Peltier cooled CCD39-01bi from e2v
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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.