Motion of 3He quasiparticles in aerogel driven by fourth sound

C. Kato, Yusuke Nago, T. Matsukura, R. Kado, K. Obara, H. Yano, O. Ishikawa, T. Hata

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

While the shear viscous motion of the normal fluid component causes the energy loss of the fourth sound resonance in superfluid 3He confined in narrow pores, it is not yet clear what causes the energy loss of the fourth sound in the aerogel system. We prepared two aerogel samples of 99.0% and 97.5% porosities, which were directly grown in sintered silver sponges and performed the fourth sound resonance experiments. We found that the energy loss of the fourth sound resonance in aerogel is much smaller than that in pure liquid 3He, showing that the mean free path of 3He quasiparticles is strongly suppressed by aerogel strands. Such behavior is explained with the frictional flow. The temperature dependence of the frictional relaxation time will be discussed.

Original languageEnglish
Article number032039
JournalJournal of Physics: Conference Series
Volume150
Issue number3
DOIs
Publication statusPublished - 2009

Fingerprint

aerogels
acoustics
energy dissipation
porosity
causes
mean free path
strands
relaxation time
silver
shear
temperature dependence
fluids
liquids

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Motion of 3He quasiparticles in aerogel driven by fourth sound. / Kato, C.; Nago, Yusuke; Matsukura, T.; Kado, R.; Obara, K.; Yano, H.; Ishikawa, O.; Hata, T.

In: Journal of Physics: Conference Series, Vol. 150, No. 3, 032039, 2009.

Research output: Contribution to journalArticle

Kato, C, Nago, Y, Matsukura, T, Kado, R, Obara, K, Yano, H, Ishikawa, O & Hata, T 2009, 'Motion of 3He quasiparticles in aerogel driven by fourth sound', Journal of Physics: Conference Series, vol. 150, no. 3, 032039. https://doi.org/10.1088/1742-6596/150/3/032039
Kato, C. ; Nago, Yusuke ; Matsukura, T. ; Kado, R. ; Obara, K. ; Yano, H. ; Ishikawa, O. ; Hata, T. / Motion of 3He quasiparticles in aerogel driven by fourth sound. In: Journal of Physics: Conference Series. 2009 ; Vol. 150, No. 3.
@article{b347ee8715b641ccb3e9a70fc7a8269a,
title = "Motion of 3He quasiparticles in aerogel driven by fourth sound",
abstract = "While the shear viscous motion of the normal fluid component causes the energy loss of the fourth sound resonance in superfluid 3He confined in narrow pores, it is not yet clear what causes the energy loss of the fourth sound in the aerogel system. We prepared two aerogel samples of 99.0{\%} and 97.5{\%} porosities, which were directly grown in sintered silver sponges and performed the fourth sound resonance experiments. We found that the energy loss of the fourth sound resonance in aerogel is much smaller than that in pure liquid 3He, showing that the mean free path of 3He quasiparticles is strongly suppressed by aerogel strands. Such behavior is explained with the frictional flow. The temperature dependence of the frictional relaxation time will be discussed.",
author = "C. Kato and Yusuke Nago and T. Matsukura and R. Kado and K. Obara and H. Yano and O. Ishikawa and T. Hata",
year = "2009",
doi = "10.1088/1742-6596/150/3/032039",
language = "English",
volume = "150",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",
number = "3",

}

TY - JOUR

T1 - Motion of 3He quasiparticles in aerogel driven by fourth sound

AU - Kato, C.

AU - Nago, Yusuke

AU - Matsukura, T.

AU - Kado, R.

AU - Obara, K.

AU - Yano, H.

AU - Ishikawa, O.

AU - Hata, T.

PY - 2009

Y1 - 2009

N2 - While the shear viscous motion of the normal fluid component causes the energy loss of the fourth sound resonance in superfluid 3He confined in narrow pores, it is not yet clear what causes the energy loss of the fourth sound in the aerogel system. We prepared two aerogel samples of 99.0% and 97.5% porosities, which were directly grown in sintered silver sponges and performed the fourth sound resonance experiments. We found that the energy loss of the fourth sound resonance in aerogel is much smaller than that in pure liquid 3He, showing that the mean free path of 3He quasiparticles is strongly suppressed by aerogel strands. Such behavior is explained with the frictional flow. The temperature dependence of the frictional relaxation time will be discussed.

AB - While the shear viscous motion of the normal fluid component causes the energy loss of the fourth sound resonance in superfluid 3He confined in narrow pores, it is not yet clear what causes the energy loss of the fourth sound in the aerogel system. We prepared two aerogel samples of 99.0% and 97.5% porosities, which were directly grown in sintered silver sponges and performed the fourth sound resonance experiments. We found that the energy loss of the fourth sound resonance in aerogel is much smaller than that in pure liquid 3He, showing that the mean free path of 3He quasiparticles is strongly suppressed by aerogel strands. Such behavior is explained with the frictional flow. The temperature dependence of the frictional relaxation time will be discussed.

UR - http://www.scopus.com/inward/record.url?scp=77952475852&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77952475852&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/150/3/032039

DO - 10.1088/1742-6596/150/3/032039

M3 - Article

AN - SCOPUS:77952475852

VL - 150

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 3

M1 - 032039

ER -