The interfacial thermal resistance between bulk superfluid He-3 and liquid He-3 in aerogel at ultralow temperatures

Physics

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https://doi.org/10.1016/S0921-4526(02)02065-3
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Keywords

thermal boundary resistance, aerogel, superfluid He-3

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The interfacial thermal resistance between bulk superfluid He-3 and liquid He-3 in aerogel at ultralow temperatures. / Fisher, Shaun N.; Guénault, A.M.; Pickett, George R. et al.
In: Physica B: Condensed Matter, Vol. 329-333, No. 1, 05.2003, p. 311-312.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{e30fcaa67e23487086921eca05cfb61d,

title = "The interfacial thermal resistance between bulk superfluid He-3 and liquid He-3 in aerogel at ultralow temperatures",

abstract = "We present the first measurements of the thermal boundary resistance of the interface between the two different liquid phases: bulk superfluid and liquid confined in aerogel. We set up a heat flow along a liquid-filled tube containing a plug of 98% aerogel, and measure the temperature at the two ends. At the lowest temperatures, the resistance is dominated by the boundary resistance at the aerogel surfaces and is unaffected by the superfluid transition of the He-3 in the aerogel. Whereas in conventional Kapitza resistance the boundary conductance is limited by acoustic mismatch, here the conductance is limited by an energy mismatch, since quasiparticles with energies above the bulk B-phase gap may freely cross the interface, while those with lower energies are confined to the aerogel.",

keywords = "thermal boundary resistance, aerogel, superfluid He-3",

author = "Fisher, {Shaun N.} and A.M. Gu{\'e}nault and Pickett, {George R.} and F. Sauer",

year = "2003",

month = may,

doi = "10.1016/S0921-4526(02)02065-3",

language = "English",

volume = "329-333",

pages = "311--312",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "ELSEVIER SCIENCE BV",

number = "1",

note = "23rd International Conference on Low Temperature Physics (LT23) ; Conference date: 20-08-2002 Through 27-08-2002",

}

RIS

TY - JOUR

T1 - The interfacial thermal resistance between bulk superfluid He-3 and liquid He-3 in aerogel at ultralow temperatures

AU - Fisher, Shaun N.

AU - Guénault, A.M.

AU - Pickett, George R.

AU - Sauer, F.

PY - 2003/5

Y1 - 2003/5

N2 - We present the first measurements of the thermal boundary resistance of the interface between the two different liquid phases: bulk superfluid and liquid confined in aerogel. We set up a heat flow along a liquid-filled tube containing a plug of 98% aerogel, and measure the temperature at the two ends. At the lowest temperatures, the resistance is dominated by the boundary resistance at the aerogel surfaces and is unaffected by the superfluid transition of the He-3 in the aerogel. Whereas in conventional Kapitza resistance the boundary conductance is limited by acoustic mismatch, here the conductance is limited by an energy mismatch, since quasiparticles with energies above the bulk B-phase gap may freely cross the interface, while those with lower energies are confined to the aerogel.

AB - We present the first measurements of the thermal boundary resistance of the interface between the two different liquid phases: bulk superfluid and liquid confined in aerogel. We set up a heat flow along a liquid-filled tube containing a plug of 98% aerogel, and measure the temperature at the two ends. At the lowest temperatures, the resistance is dominated by the boundary resistance at the aerogel surfaces and is unaffected by the superfluid transition of the He-3 in the aerogel. Whereas in conventional Kapitza resistance the boundary conductance is limited by acoustic mismatch, here the conductance is limited by an energy mismatch, since quasiparticles with energies above the bulk B-phase gap may freely cross the interface, while those with lower energies are confined to the aerogel.

KW - thermal boundary resistance

KW - aerogel

KW - superfluid He-3

U2 - 10.1016/S0921-4526(02)02065-3

DO - 10.1016/S0921-4526(02)02065-3

M3 - Journal article

VL - 329-333

SP - 311

EP - 312

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

IS - 1

T2 - 23rd International Conference on Low Temperature Physics (LT23)

Y2 - 20 August 2002 through 27 August 2002

ER -

Research

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