Thermally Driven Acoustic Oscillations in the NICMOS Dewar Cooling Line
972474
07/01/1997
- Event
- Content
- 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.
- Pages
- 15
- Citation
- 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.