Diapositive 1

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EIT/SOHO (Extreme-ultraviolet Imaging Telescope)
Fe IX ( 17.1 nm) Fe XII (19.5 nm) Fe XV (28.4
nm) He II (30.4 nm) ( 6 x 104 K 3 x 106
K)
CCD
Stray light filter
Filter wheel
Telescope mirrors
Sector wheel
Entrance filters
Sun
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IAS Calibration Facility

• Transmittance of the flight filters
• Reflectivity of Mo/Si Multilayers Witness
  Samples
• Quantum Efficiency of CCD
• Flat Field of CCD pixels
• Throughput of EIT instrument

Reflectometer
Monochromator
Synchrotron
Neptune Vacuum tank
Spectral range 10 to 300 nm
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Mo/Si Primary mirror wetness samples
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CCD uniformity at 17.1 nm
Quantum Efficiency of the EIT CCD
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The Throughput of the EIT instrument
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More than 14 000 sets of four images obtained
from EIT more than 400 000 images at 19.5 nm
19.5 nm
28.4 nm
30.4 nm
17.1 nm