Citation
Laguna, Glenn A. (1975) Second sound attenuation in a liquid helium counterflow jet. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/7C0G-HK08. https://resolver.caltech.edu/CaltechTHESIS:09282010-140423372
Abstract
The attenuation of a beam of high frequency second sound traversing a counterflow jet in liquid helium has been measured in the temperature range 1.6 to 2.06°K. Combined use of thin film superconducting thermometers with specially developed low noise amplifiers allowed a temperature resolution of better than one part in 10^8 °K. The additional attenuation due to the jet was found to be less than 10 percent of the predicted value using the theory of mutual friction in a supercritical counterflow, and consistent with the result of earlier temperature gradient and ion beam attenuation measurements.
| Item Type: | Thesis (Dissertation (Ph.D.)) |
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| Subject Keywords: | Applied Physics |
| Degree Grantor: | California Institute of Technology |
| Division: | Engineering and Applied Science |
| Major Option: | Applied Physics |
| Thesis Availability: | Public (worldwide access) |
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| Thesis Committee: |
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| Defense Date: | 10 March 1975 |
| Record Number: | CaltechTHESIS:09282010-140423372 |
| Persistent URL: | https://resolver.caltech.edu/CaltechTHESIS:09282010-140423372 |
| DOI: | 10.7907/7C0G-HK08 |
| Default Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 6069 |
| Collection: | CaltechTHESIS |
| Deposited By: | Benjamin Perez |
| Deposited On: | 28 Sep 2010 21:18 |
| Last Modified: | 21 Dec 2019 03:07 |
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