This application highlight addresses the measurement of materials under vacuum conditions using the Modified Transient Plane Source (MTPS).
Accurately measuring the thermal conductivity of insulation materials, such as foams, aerogels, and other porous structures, under vacuum conditions is essential for applications where convective heat transfer is eliminated, and conduction and radiation become the dominant modes of heat transport. This is particularly relevant in aerospace systems, where spacecraft and satellites operate in high-vacuum environments and require reliable thermal insulation to protect onboard electronics and maintain thermal stability. Cryogenic technologies, including those used in liquefied gas storage, superconducting systems, and scientific instrumentation, also depend on vacuum environments to minimize heat ingress. In these contexts, understanding how insulation materials perform under vacuum enables engineers and researchers to select and design materials that meet stringent thermal performance requirements, ensuring safety, efficiency, and longevity of critical systems.1
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