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Thermally Driven Acoustic Oscillations in the NICMOS Dewar Cooling Line
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Abstract
The Near Infrared Camera and Multi Object Spectrometer (NICMOS) was installed aboard the Hubble Space Telescope in February 1997. This instrument contains a solid nitrogen dewar for cooling infrared detectors to a temperature of 58 K. Gaseous helium flowing through a small diameter tube internal to the cryogen tank was used to freeze the nitrogen. A sudden and significant increase in the dewar heat leak during instrument development resulted in a detailed study of the possible causes. This investigation lead to the conclusion that thermally driven acoustic oscillations caused the anomalous heat transfer.
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Schweickart, R. and Miller, C., "Thermally Driven Acoustic Oscillations in the NICMOS Dewar Cooling Line," SAE Technical Paper 972474, 1997, https://doi.org/10.4271/972474.Also In
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