Proceedings PaperSOFRADIR detector dewar cooler assemblies evolution to fulfill new market requirements
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Sofradir IRFPAs using MCT material are generally cooled down with classical coolers such as regulated or non regulated Joule Thomson coolers, rotary or linear closed cycle Stirling machines. By using these coolers, it is possible to satisfy a large range of application requirements. Nevertheless, the requirements for new military equipment increased during the last two years putting more pressure on cooling system requirements. On the other hand, the continuous increase of the size of available IRFPA also puts more pressure on cooling system requirements. Finally, the reduction of military budgets and the potential commercial market forces one to propose new configurations. Therefore, Sofradir has worked in the following different fields: (1) development of a very small flat detector dewar using a flat Joule Thomson cooler for severe environmental conditions such as seeker applications; (2) development of a detector dewar using the IDCA (integrated dewar/cooler) concept for high performance, and low cost application; and (3) development of detector dewar using thermoelectric coolers for low cost application. Sofradir presents the results of these activities.