20 May 2011 Lifetime testing results and diagnostic performance prediction of linear coolers at Thales Cryogenics
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Abstract
Thales Cryogenics (TCBV) has an extensive background in delivering long-life cryogenic coolers for military, civil and space programs. During the last years many technical improvements have increased the lifetime of coolers resulting in significantly higher MTTF's. Lifetime endurance tests are used to validate these performance increases. An update will be given on lifetime test of a selection of TCBV's coolers. MTTF figures indicate the statistical average lifetimes for a large population of coolers. However, for the user of IR camera's and spectrometers a detailed view on the performance of an individual cooler and the possible impact of its performance degradation during its lifetime is very important. Thales Cryogenics is developing Cooler Diagnostic Software (CDS), which can be implemented in the firmware of its DSP based cooler drive electronics. With this implemented software the monitoring of the main cooler parameters during the lifetime in the equipment will be possible, including the prediction of the expected cooler performance availability. Based on this software it will be possible to analyze the status of the cooler inside the equipment and, supported by the lifetime knowledge at Thales Cryogenics, make essential choices on the maintenance of equipment and the replacement of coolers. In the paper, we will give an overview of potential situations in which such a predictive algorithm can be used. We will present the required interaction with future users to make an optimal interaction and interpretation of the generated data possible.
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H. van der Weijden, H. van der Weijden, T. Benschop, T. Benschop, W. van de Groep, W. van de Groep, D. Willems, D. Willems, } "Lifetime testing results and diagnostic performance prediction of linear coolers at Thales Cryogenics", Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 80122N (20 May 2011); doi: 10.1117/12.886354; https://doi.org/10.1117/12.886354
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