The transient of the Soret effect visualizing the variation of concentration in binary mixture in a region very close where thermal gradient applies
Chemical Wave In Soret effect (CWIS) is an experiment to study the transient of the Soret effect visualizing the variation of concentration in binary mixture in a region very close where thermal gradient applies.
A first version of the experiment was launched in May 2014 on-board a REXUS sounding rocket from Esrange Space Center. The experiment takes advantages of a modified Fizeau interferometer that squeezes the image in obtain high resolution images of a small region of the liquid system. Fizeau interferometry is very robust with respect to vibration and shocks. The liquid cell system design includes an a reference liquid chamber and allows observing the concentration variation induced by Thermodiffusion.
The objective is to visualize the named Chemical Wave, a strong concentration variation at the very beginning of the Soret Effect that was only theorized and never observed experimentally.