Athermal vacuum chamber (TVAC) is avacuum chamber in which theradiative thermal environment is controlled.

Typically the thermal environment is achieved by passingliquids orfluids through thermal shrouds for coldtemperatures or through the application of thermallamps for hightemperatures.

Thermal vacuum chambers are frequently used for testingspacecraft or parts thereof under a simulatedspace environment.

Thermal vacuum chambers can be found at:

• NASA'sSpace Environment Simulation Laboratory at theJohnson Space Center^[1]
• NASA'sSpace Power Facility,^[2]Spacecraft Propulsion Research Facility^[3] andCryogenic Propellant Tank Facility (K-Site)^[4] at theGlenn Research Center
• NASA'sSpace Environment Simulator^[5] atGoddard Space Flight Center
• NASA's DynaVac 36" T/V Chamber^[6]
• The ESA Large Space Simulator^[7]

• Vacuum engineering

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