The Yacadire test bench has the following functions :
- Simulate and control the environmental conditions of an IR detector, especially regarding the vacuum, thermal conditions and its optics
- Perform calibrations on IR detectors
YACADIRE is located in a cleanroom (cleanroom SOYOUZ, Class 10000 or ISO 7).
YACADIRE (YAmina CAlibration Detector Infra Red Euros) has been developed to calibrate the infrared detector of the instrument VIRTIS-H (Missions ROSETTA & VENUS-EXPRESS).
The setup has been conceptualized with the idea to be reused for other experiences, so with a certain degree of flexibilities. It has been served for qualification trials for the subsystems of the MIRI instrument and for the coronagraph of SPHERE.
The installation includes :
- A horizontal cylindrical vacuum chamber
- A pumping system ((primary + secondary) consisting of :
- A rotary vane pump (outside the room) ;
- A turbomolecular pump mounted on the vacuum chamber ;
- A cryogenerator with a cooling power of 40W @77K ;
- A filterwheel with 12 positions at the interior of the vacuum chamber, also cooled ;
- A granite bench (1600x800 mm2) on which are based the optical stimuli (e.g. the integrating sphere).
- YACADIRE test bench
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- YACADIRE test bench
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- Internal mechanics of YACADIRE
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- YACADIRE assembly vertical cut
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- View of the internal assembly of YACADIRE
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The calibration consists of determining the characteristic magnitudes of the IR detector by exploring the results of the following measurements :
- Response as a function of the load ;
- Dark current ;
- Read-out noise ;
- Response as a function of the photon flux ;
- Flat fields as a function of the wavelength;
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