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Second sound attenuation in a liquid helium counterflow jet

Citation

Laguna, Glenn A. (1975) Second sound attenuation in a liquid helium counterflow jet. Dissertation (Ph.D.), California Institute of Technology. http://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.))
Subject Keywords:Applied Physics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Applied Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Liepmann, Hans Wolfgang (advisor)
  • Broadwell, James E. (co-advisor)
  • Dimotakis, Paul E. (co-advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:10 March 1975
Record Number:CaltechTHESIS:09282010-140423372
Persistent URL:http://resolver.caltech.edu/CaltechTHESIS:09282010-140423372
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:26 Dec 2012 04:30

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