3He in 99.5% Porous Aerogel at the Normal-Superfluid Transition

S. C.J. Kingsley, G. Lawes, A. Golov, K. Matsumoto, J. V. Porto, E. N. Smith, N. Mulders, Moses Hung-Wai Chan, J. M. Parpia

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have used a torsional oscillator to measure the superfluid density and dissipation near the superfluid transition of 3He in aerogel of 99.5% porosity. We used a new cell (constructed at Penn State) for which the aerogel was grown in the pores of a ∼100 μm silver sinter. The cell was tested with 4He and showed no signs of the second-sound resonances that have interfered with previous torsional oscillator measurements. The measurements with 3He, presented here, were taken at pressures of 1.34 and 4.13 bars. We observed values of ρs/ρ in the T→ 0 limit of 0.05 and 0.14 respectively. Our measurements show an increase in the dissipation on warming through Tc. This series of measurements is ongoing and temperature sweeps at various pressures are planned.

Original languageEnglish (US)
Pages (from-to)357-361
Number of pages5
JournalJournal of Low Temperature Physics
Volume113
Issue number3-4
StatePublished - Dec 1 1998

Fingerprint

Aerogels
aerogels
dissipation
oscillators
porosity
cells
Silver
Porosity
silver
Acoustic waves
heating
acoustics
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Kingsley, S. C. J., Lawes, G., Golov, A., Matsumoto, K., Porto, J. V., Smith, E. N., ... Parpia, J. M. (1998). 3He in 99.5% Porous Aerogel at the Normal-Superfluid Transition. Journal of Low Temperature Physics, 113(3-4), 357-361.
Kingsley, S. C.J. ; Lawes, G. ; Golov, A. ; Matsumoto, K. ; Porto, J. V. ; Smith, E. N. ; Mulders, N. ; Chan, Moses Hung-Wai ; Parpia, J. M. / 3He in 99.5% Porous Aerogel at the Normal-Superfluid Transition. In: Journal of Low Temperature Physics. 1998 ; Vol. 113, No. 3-4. pp. 357-361.
@article{3826b667930642eeb4ed044a862b64d7,
title = "3He in 99.5{\%} Porous Aerogel at the Normal-Superfluid Transition",
abstract = "We have used a torsional oscillator to measure the superfluid density and dissipation near the superfluid transition of 3He in aerogel of 99.5{\%} porosity. We used a new cell (constructed at Penn State) for which the aerogel was grown in the pores of a ∼100 μm silver sinter. The cell was tested with 4He and showed no signs of the second-sound resonances that have interfered with previous torsional oscillator measurements. The measurements with 3He, presented here, were taken at pressures of 1.34 and 4.13 bars. We observed values of ρs/ρ in the T→ 0 limit of 0.05 and 0.14 respectively. Our measurements show an increase in the dissipation on warming through Tc. This series of measurements is ongoing and temperature sweeps at various pressures are planned.",
author = "Kingsley, {S. C.J.} and G. Lawes and A. Golov and K. Matsumoto and Porto, {J. V.} and Smith, {E. N.} and N. Mulders and Chan, {Moses Hung-Wai} and Parpia, {J. M.}",
year = "1998",
month = "12",
day = "1",
language = "English (US)",
volume = "113",
pages = "357--361",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "Springer New York",
number = "3-4",

}

Kingsley, SCJ, Lawes, G, Golov, A, Matsumoto, K, Porto, JV, Smith, EN, Mulders, N, Chan, MH-W & Parpia, JM 1998, '3He in 99.5% Porous Aerogel at the Normal-Superfluid Transition', Journal of Low Temperature Physics, vol. 113, no. 3-4, pp. 357-361.

3He in 99.5% Porous Aerogel at the Normal-Superfluid Transition. / Kingsley, S. C.J.; Lawes, G.; Golov, A.; Matsumoto, K.; Porto, J. V.; Smith, E. N.; Mulders, N.; Chan, Moses Hung-Wai; Parpia, J. M.

In: Journal of Low Temperature Physics, Vol. 113, No. 3-4, 01.12.1998, p. 357-361.

Research output: Contribution to journalArticle

TY - JOUR

T1 - 3He in 99.5% Porous Aerogel at the Normal-Superfluid Transition

AU - Kingsley, S. C.J.

AU - Lawes, G.

AU - Golov, A.

AU - Matsumoto, K.

AU - Porto, J. V.

AU - Smith, E. N.

AU - Mulders, N.

AU - Chan, Moses Hung-Wai

AU - Parpia, J. M.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - We have used a torsional oscillator to measure the superfluid density and dissipation near the superfluid transition of 3He in aerogel of 99.5% porosity. We used a new cell (constructed at Penn State) for which the aerogel was grown in the pores of a ∼100 μm silver sinter. The cell was tested with 4He and showed no signs of the second-sound resonances that have interfered with previous torsional oscillator measurements. The measurements with 3He, presented here, were taken at pressures of 1.34 and 4.13 bars. We observed values of ρs/ρ in the T→ 0 limit of 0.05 and 0.14 respectively. Our measurements show an increase in the dissipation on warming through Tc. This series of measurements is ongoing and temperature sweeps at various pressures are planned.

AB - We have used a torsional oscillator to measure the superfluid density and dissipation near the superfluid transition of 3He in aerogel of 99.5% porosity. We used a new cell (constructed at Penn State) for which the aerogel was grown in the pores of a ∼100 μm silver sinter. The cell was tested with 4He and showed no signs of the second-sound resonances that have interfered with previous torsional oscillator measurements. The measurements with 3He, presented here, were taken at pressures of 1.34 and 4.13 bars. We observed values of ρs/ρ in the T→ 0 limit of 0.05 and 0.14 respectively. Our measurements show an increase in the dissipation on warming through Tc. This series of measurements is ongoing and temperature sweeps at various pressures are planned.

UR - http://www.scopus.com/inward/record.url?scp=0032203995&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032203995&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032203995

VL - 113

SP - 357

EP - 361

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 3-4

ER -

Kingsley SCJ, Lawes G, Golov A, Matsumoto K, Porto JV, Smith EN et al. 3He in 99.5% Porous Aerogel at the Normal-Superfluid Transition. Journal of Low Temperature Physics. 1998 Dec 1;113(3-4):357-361.