Thanks to important development efforts completed and partial ESA funding, Air Liquide Advanced Technology
Division (AL/DTA), is now in position to propose two Pulse Tube cooler systems in the 40-80K temperature range for
coming Earth Observation missions such as Meteosat Third Generation, Sentinel 3, etc... The two pulse tube coolers
thermo-mechanical units are qualified against environmental constraints.
The associated Cooler Drive Electronics is also an important aspect specifically regarding the active control of the
cooler thermo-mechanical unit during the launch phase, the active reduction of the vibrations induced by the compressor
(partly supported by the French Agency CNES) of course the electrical interfaces with the compressor.
This paper details the presentation of the two Pulse Tube Coolers together with the Cooler Drive Electronics aspects.
AL/DTA became a major supplier in the field of space cryogenics for the European Space Industry. From MELFI freezer for the International Space Station (ISS) to HERSCHEL and PLANCK satellites for Cosmic Vision, AL/DTA has acquired a large know-how in space cryogenic systems. Convinced by the great interest of Pulse Tube technology for space applications and especially for Earth Observation or Surveillance Tracking, AL/DTA started its first development in mid nineteenths. Then the European Space Agency started to support the development in 2000. Partnerships were launched with CEA/SBT (France) and Thales Cryogenics B.V. (The Netherlands) in order to take the advantage of the competencies and experience of each other. Based on the will to improve important issues such as reliability and mechanical robustness, technology improvements are now available in AL/DTA Pulse Tube coolers. This paper proposes an overview of AL/DTA cryocoolers for space applications following by a detailed description of Pulse Tube Coolers and particularly their integration.