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Publications - Thales Cryogenics

ICC_20 Paper – Synergies between designed-for-space and tactical cryocooler developments

In this paper, an overview is presented of the latest developments of space cryocoolers at Thales Cryogenics B.V. Planned future developments for the LPT6510 cooler are presented, and the synergies between Commercial-off-the-shelf (COTS) and space are reviewed, such as design principles from space coolers being applied to an upgraded variant of the COTS LPT9310, as well as design principles from COTS coolers being applied to the LPT6510 for improved manufacturability.
Thales performed a simulation and experimental study into the coupling of an off-the-shelf pulse tube to a designed-for-space, high-performance compressor, and a prediction is given regarding what performances could potentially be achieved with an optimized design.

D. Willems, R. Arts, J. Buist, J. Mullié, G. de Jonge, T. Benschop
Thales Cryogenics B.V., Eindhoven, The Netherlands

ICC_20 Paper – RMs1 The state of art SWaP Cryocooler

The trend for miniaturized Integrated Dewar and Cooler Assemblies (IDCA) has been confirmed over the past few years with several publications of new generation IR detector’s working at High Operating Temperature (HOT). This HOT-technology enables the use of cryocoolers with reduced cryogenic power. In the past 2 years Thales Cryogenics BV and Thales-LAS-Fr have jointly developed a new generation of SWaP coolers to be used with the new generation detectors that could bring a competitive advantage to our customers. This new generation SWaP coolers of Thales consists of linear as well as rotary coolers.
In this paper special attention will be given to the design philosophy and performance of the SWaP rotary cooler RMs1. The design hypotheses used could lead to a new generation of rotary coolers which will be very versatile in the different utilization areas not limited to IR sensors.

Christophe Vasse, Jean-Yves Martin, Cédric Seguineau and Tonny Benschop
Thales LAS France SAS
4 rue Marcel Doret, 31700 BLAGNAC, FRANCE

ICC_20 Paper – A linear Stirling Cooler for extreme ambient temperatures

With the achievements made in the last decade with respect to reliability and cryogenic performance, the use of linear cryocoolers for new application areas has become viable. Thales Cryogenics has been challenged by its customers to deliver robust and compact solutions for a variety of applications.
One of these challenges is the use of coolers in extreme environmental conditions. In this paper, a linear Stirling cooler is presented that is designed for use in such extreme conditions, one of which is an ambient temperature of 150°C. The application for which this cooler is intended – the cooling of electronics and imaging sensors – requires 25 W of cooling power between 423 K and 223 K. Because of the need for a high-efficient solution within a limited geometrical envelope, a Stirling cooler was selected as the most suitable cooler type.
We will describe the impact of the high ambient temperatures on the fundamental thermodynamics of the Stirling cooler. Furthermore, we will present some of the practical challenges in the design of the cooler. Finally, we will present the results of the qualification and performance testing of the coolers that were built.

D. Willems, J. Mullié, F. v. Wordragen, G. de Jonge
Thales Cryogenics B.V., Eindhoven, The Netherlands