CW measurement of the upward-going temperature wave in the helium-4 self-organized critical state

S. T.P. Boyd, D. A. Sergatskov, R. V. Duncan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We describe the first continuous-wave (CW) measurements of the upward-going temperature wave in the self-organized-critical (SOC) state which forms in 4He under conditions of downward heat flow near Tλ under gravity. The CW technique permits measurements with extremely low (<1 nK) excitation amplitudes, allows continuous measurement of the wave velocity as the SOC state grows, and has yielded the first quantitative measurements of the attenuation. The CW measurements appear to support predictions for the velocity but disagree with predictions for the attenuation. This new technique may help us understand the underlying mechanism of the SOC state.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages135-136
Number of pages2
DOIs
StatePublished - 2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: Aug 10 2006Oct 17 2006

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period08/10/0610/17/06

Keywords

  • Helium
  • Lambda transition
  • Self-organized criticality
  • Superfluid

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    Boyd, S. T. P., Sergatskov, D. A., & Duncan, R. V. (2006). CW measurement of the upward-going temperature wave in the helium-4 self-organized critical state. In LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 (pp. 135-136). (AIP Conference Proceedings; Vol. 850). https://doi.org/10.1063/1.2354639