Effects of 4He Film on Quartz Tuning Forks in 3He at Ultra-low Temperatures

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Standard

Effects of 4He Film on Quartz Tuning Forks in 3He at Ultra-low Temperatures. / Riekki, T. S.; Rysti, J.; Mäkinen, J. T.; Sebedash, A. P.; Eltsov, V. B.; Tuoriniemi, J. T.

julkaisussa: Journal of Low Temperature Physics, Vuosikerta 196, Nro 1-2, 15.07.2019, s. 73-81.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Harvard

APA

Vancouver

Author

Bibtex - Lataa

@article{23ed33d81b6540cabb3396920a89d8c4,
title = "Effects of 4He Film on Quartz Tuning Forks in 3He at Ultra-low Temperatures",
abstract = "In pure superfluid 3He–B at ultra-low temperatures, the quartz tuning fork oscillator response is expected to saturate when the dissipation caused by the superfluid medium becomes substantially smaller than the internal dissipation of the oscillator. However, even with a small amount of 4He covering the surfaces, we have observed saturation already at significantly higher temperatures than anticipated, where we have other indicators to prove that the 3He liquid is still cooling. We found that this anomalous behavior has a rather strong pressure dependence, and it practically disappears above the crystallization pressure of 4He. We also observed a maximum in the fork resonance frequency at temperatures where the transition in quasiparticle flow from the hydrodynamic to the ballistic regime is expected. We suggest that such anomalous features derive from the superfluid 4He film on the oscillator surface.",
keywords = "Helium-3, Helium-3–Helium-4 mixture, Helium-4 film, Quartz tuning fork",
author = "Riekki, {T. S.} and J. Rysti and M{\"a}kinen, {J. T.} and Sebedash, {A. P.} and Eltsov, {V. B.} and Tuoriniemi, {J. T.}",
note = "| openaire: EC/H2020/694248/EU//TOPVAC",
year = "2019",
month = "7",
day = "15",
doi = "10.1007/s10909-018-02141-y",
language = "English",
volume = "196",
pages = "73--81",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
number = "1-2",

}

RIS - Lataa

TY - JOUR

T1 - Effects of 4He Film on Quartz Tuning Forks in 3He at Ultra-low Temperatures

AU - Riekki, T. S.

AU - Rysti, J.

AU - Mäkinen, J. T.

AU - Sebedash, A. P.

AU - Eltsov, V. B.

AU - Tuoriniemi, J. T.

N1 - | openaire: EC/H2020/694248/EU//TOPVAC

PY - 2019/7/15

Y1 - 2019/7/15

N2 - In pure superfluid 3He–B at ultra-low temperatures, the quartz tuning fork oscillator response is expected to saturate when the dissipation caused by the superfluid medium becomes substantially smaller than the internal dissipation of the oscillator. However, even with a small amount of 4He covering the surfaces, we have observed saturation already at significantly higher temperatures than anticipated, where we have other indicators to prove that the 3He liquid is still cooling. We found that this anomalous behavior has a rather strong pressure dependence, and it practically disappears above the crystallization pressure of 4He. We also observed a maximum in the fork resonance frequency at temperatures where the transition in quasiparticle flow from the hydrodynamic to the ballistic regime is expected. We suggest that such anomalous features derive from the superfluid 4He film on the oscillator surface.

AB - In pure superfluid 3He–B at ultra-low temperatures, the quartz tuning fork oscillator response is expected to saturate when the dissipation caused by the superfluid medium becomes substantially smaller than the internal dissipation of the oscillator. However, even with a small amount of 4He covering the surfaces, we have observed saturation already at significantly higher temperatures than anticipated, where we have other indicators to prove that the 3He liquid is still cooling. We found that this anomalous behavior has a rather strong pressure dependence, and it practically disappears above the crystallization pressure of 4He. We also observed a maximum in the fork resonance frequency at temperatures where the transition in quasiparticle flow from the hydrodynamic to the ballistic regime is expected. We suggest that such anomalous features derive from the superfluid 4He film on the oscillator surface.

KW - Helium-3

KW - Helium-3–Helium-4 mixture

KW - Helium-4 film

KW - Quartz tuning fork

UR - http://www.scopus.com/inward/record.url?scp=85060213185&partnerID=8YFLogxK

U2 - 10.1007/s10909-018-02141-y

DO - 10.1007/s10909-018-02141-y

M3 - Article

VL - 196

SP - 73

EP - 81

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 1-2

ER -

ID: 31641628