1. CCD wavefront sensing system for the ESO Multi-conjugate Adaptive Optics Demonstrator (MAD) C.Cavadore, C.Cumani, The ESO-ODT team, F.Franza, E.Marchetti, The ESO AO group European Southern Observatory
MCAO prototype toward ELT (3-8 stars, high Strehl over 2’ in K)
Visible Wavefront sensors : 5 CCD Marconi 50
2 AO correction methods  CCD complete heads
ESO FIERA controller  12 video inputs
CCD Head must be compact
90x60x40 mm, light : 500g, TEC cooling, vacuum, Embedded micro lens array  New head designs
Mounted on XY stages
Find the star to sense the wavefront
Cable length and stiffness requirements : soft cables
Low noise and high frame rate : <3.5e-, 500Hz
Texp_CCD1 = N* Texp_CCD2 and synchronized
Poster #10
Workshop Scientific Detectors for Astronomy June 16-22, 2002 Waimea, Hawai`i

2. Opto-mechanical setup
CCD wavefront sensing system for the ESO Multi-conjugate Adaptive Optics Demonstrator (MAD)
Micro lens array
Pickup mirror
2’ field of view
ESO FIERA system
XY stage
Soft CCD cables
200 mm
Head
Opto-mechanical setup
Shack Hartmann WFS
AO Marconi CCD50
4 ports/CCD used
24 mm pixels
Workshop Scientific Detectors for Astronomy June 16-22, 2002 Waimea, Hawai`i