===== BYPASS instruments, techniques and cells =====

=== SCITEAS === 
{{ :sshade:databases:bypass:sciteas.png?350|Simulation Chamber for Imaging the Temporal Evolution of Analogue Samples}}
The SCITEAS (//**S**imulation **C**hamber for **I**maging **T**emporal **E**volution of **A**nalogous **S**amples//) facility is an original simulation chamber aiming at studying the temporal evolution of icy analogues (of comets and other small bodies, Mars etc.) under low temperature and low pressure conditions [[http://www.sciencedirect.com/science/article/pii/S0032063315000380|Pommerol et al., 2015]].
\\ 
\\ 
**The chamber**

  * Cylindrical, 30 cm in diameter and 32 cm high
  * Ice samples several centimeters large and thick can be placed inside
  * Cooling by circulation of liquid nitrogen in a shroud around the sample (about -100°C)
  * Vacuum down to about 10<sup>-7</sup> mbar (primary and turbo pumps)
\\ 
**The Imaging System**

A quartz window on top of the sample enables to monitor the sample surface evolution with a //hyperspectral imaging system// positioned outside the chamber.
  * **Tunable monochromatic light source**:
    * light from a 100 W Quartz Tungsten Halogen lamp (Oriel 7340)
    * dispersed and filtered by a Oriel MS257 monochromator producing the desired monochromatic light from 0.4 to 2.4 µm
    * focused on a fiber bundle made of 37 Optran WF fibers (Ceramoptec) to illuminate the sample through the window (or with the chamber open)

  * **Two cameras** on top of the chamber:
    * a visible camera (0.38-1.08 µm): 1.4-Megapixel scientific-grade camera (model TSI 1500M-GE from Thorlabs) equipped with a 1392x1040 CCD sensor 
    * a near-infrared camera (0.85-2.4 µm): Xeva-2.5-300 from Xenics equipped with a 320x256 pixels HgCdTe (MCT) detector cooled by a four-stage Peltier element