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    Human in space


All Ariane 5 rockets feature a spherical cryogenic storage tank called the LHESS, which supplies the helium circuit that pressurizes lower-stage liquid oxygen tank. We designed this unique supercritical helium cryostat to meet the launch vehicles' need for compactness and efficiency, as well as the mechanical strength imposed by take-off. The most complex technical challenges are this tank's perfect leak-tightness and exemplary thermal insulation. And these are challenges we have met!

Why choose us?

  • 01

    Our experience

    We have worked on all the developments for the European launch vehicle, Ariane, as well as numerous international projects, including the International Space Station; the Planck, Herschel, and Microscope satellites; and the Curiosity and ExoMars exploration rovers, among others.

  • 02

    The expertise of our teams

    Our employees are passionate about their work. Our results-minded approach and wealth of expertise have allowed us to make great strides and are now leading us to even more ambitious technological challenges, from launch vehicles with reignition capability and electric propulsion for satellites, to life on Mars...

  • 03

    Our capacity for innovation

    Our innovation teams rely on Air Liquide's expertise and close collaborations with public research laboratories, like the CEA, the CNRS, and the Grenoble University Space Center.