Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure
Acoustic radiation pressure is thought to be very useful for solid ⁴He experiment under the microgravity. We observed that solid-liquid interface of ⁴He was manipulated by the acoustic wave. We applied the sound pulse perpendicularly to the flat interface between two transducers. The interface moved...
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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| Zitieren: | Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure / R. Nomura, Y. Suzuki, S. Kimura, Y. Okuda, S. Burmistrov // Физика низких температур. — 2003. — Т. 29, № 6. — С. 663-666. — Бібліогр.: 8 назв. — англ. |
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irk-123456789-1288552018-01-15T03:05:03Z Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure Nomura, R. Suzuki, Y. Kimura, S. Okuda, Y. Burmistrov, S. 3-й Международный семинар по физике низких температур в условиях микрогравитации Acoustic radiation pressure is thought to be very useful for solid ⁴He experiment under the microgravity. We observed that solid-liquid interface of ⁴He was manipulated by the acoustic wave. We applied the sound pulse perpendicularly to the flat interface between two transducers. The interface moved to the sound direction at low temperatures. We also checked how the interface moved when sound was applied parallel to the interface. Dynamics of the interface during and after the sound pulse were recorded by a high speed CCD camera. 2003 Article Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure / R. Nomura, Y. Suzuki, S. Kimura, Y. Okuda, S. Burmistrov // Физика низких температур. — 2003. — Т. 29, № 6. — С. 663-666. — Бібліогр.: 8 назв. — англ. 0132-6414 PACS: 67.80.-s, 81.10.-h, 43.35.+d http://dspace.nbuv.gov.ua/handle/123456789/128855 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
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3-й Международный семинар по физике низких температур в условиях микрогравитации 3-й Международный семинар по физике низких температур в условиях микрогравитации |
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3-й Международный семинар по физике низких температур в условиях микрогравитации 3-й Международный семинар по физике низких температур в условиях микрогравитации Nomura, R. Suzuki, Y. Kimura, S. Okuda, Y. Burmistrov, S. Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure Физика низких температур |
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Acoustic radiation pressure is thought to be very useful for solid ⁴He experiment under the microgravity. We observed that solid-liquid interface of ⁴He was manipulated by the acoustic wave. We applied the sound pulse perpendicularly to the flat interface between two transducers. The interface moved to the sound direction at low temperatures. We also checked how the interface moved when sound was applied parallel to the interface. Dynamics of the interface during and after the sound pulse were recorded by a high speed CCD camera. |
| format |
Article |
| author |
Nomura, R. Suzuki, Y. Kimura, S. Okuda, Y. Burmistrov, S. |
| author_facet |
Nomura, R. Suzuki, Y. Kimura, S. Okuda, Y. Burmistrov, S. |
| author_sort |
Nomura, R. |
| title |
Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure |
| title_short |
Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure |
| title_full |
Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure |
| title_fullStr |
Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure |
| title_full_unstemmed |
Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure |
| title_sort |
manipulation of solid-liquid interface of ⁴he by acoustic radiation pressure |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
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2003 |
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3-й Международный семинар по физике низких температур в условиях микрогравитации |
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http://dspace.nbuv.gov.ua/handle/123456789/128855 |
| citation_txt |
Manipulation of solid-liquid interface of ⁴He by acoustic radiation pressure / R. Nomura, Y. Suzuki, S. Kimura, Y. Okuda, S. Burmistrov // Физика низких температур. — 2003. — Т. 29, № 6. — С. 663-666. — Бібліогр.: 8 назв. — англ. |
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Физика низких температур |
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2025-07-09T10:02:32Z |
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2025-07-09T10:02:32Z |
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| fulltext |
Fizika Nizkikh Temperatur, 2003, v. 29, No. 6, p. 663–666
Manipulation of solid-liquid interface of 4He by acoustic
radiation pressure
R. Nomura, Y. Suzuki, S. Kimura, Y. Okuda, and S. Burmistrov*
Department of Condensed Matter Physics, Tokyo Institute of Technology
2-12-1, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
E-mail: nomura@ap.titech.ac.jp
Received December 19, 2002
Acoustic radiation pressure is thought to be very useful for solid 4He experiment under the
microgravity. We observed that solid-liquid interface of 4He was manipulated by the acoustic
wave. We applied the sound pulse perpendicularly to the flat interface between two transducers.
The interface moved to the sound direction at low temperatures. We also checked how the inter-
face moved when sound was applied parallel to the interface. Dynamics of the interface during and
after the sound pulse were recorded by a high speed CCD camera.
PACS: 67.80.–s, 81.10.–h, 43.35.+d
Introduction
In the microgravity environment it is very impor-
tant to control an object without a direct contact. For
this purpose acoustic radiation pressure is a useful
tool. It was used for investigating the dynamics of li-
quid drops [1,2] and for passive stabilization of liquid
capillary bridges [3] in the low-gravity.
In case of a crystal growth experiment under the
microgravity it is not easy to keep and control the
crystal at a proper position. Once it detaches from a
wall and starts to move freely, it is very difficult to
stop it especially in a superfluid that has no viscosity.
It will be very helpful if one can control the motion of
4He crystal easily. This kind of technique will also be
used to study new types of dynamics like a shape evo-
lution of rotating quantum crystal under the
microgravity, collision or friction between two quan-
tum crystals and so on. Acoustic radiation pressure is
thought to be a good way to manipulate the crystal.
We found that solid-liquid interface of 4He, which
is known to have an ultrahigh mobility [4,5], could be
manipulated by sound wave. When the sound pulse
was applied from the liquid side to the flat interface,
the solid was melted at all temperatures below 1.2 K.
But when the sound pulse was applied from the solid
side the solid was melted above 750 mK and grown be-
low it [6,7]. These interface motion were driven by
acoustic radiation pressure. In quantum mechanical
representations radiation pressure is interpreted as
momentum transfer from phonons to the interface [8].
We recorded the dynamics of interface during and af-
ter the sound pulse by a high-speed CCD camera.
Experimental results and discussions
Experiment was performed in a cell cooled by a di-
lution refrigerator. It had optical access from room
© R. Nomura, Y. Suzuki, S. Kimura, Y. Okuda, and S. Burmistrov, 2003
* Permanent address: Department of Superconductivity and Solid State Physics, Kurchatov Institute, Moscow 123182,
Russia
Fig. 1. Melting of 4He crystal induced by sound wave
from the liquid side.
temperature and we could observe 4He crystal down
to 50 mK. Two longitudinal transducers faced each
other were prepared in a cell. Their resonance fre-
quency was about 10 MHz and distance was 10 mm.
Sound directions were vertical. Large 4He crystal was
grown in the cell and occupied the lower half space.
Solid-liquid interface was adjusted midway between
the two transducers. It was horizontally flat without
sound because of the gravity. Sound pulse was applied
to the interface from the liquid side or downward by
the upper transducer and from the solid side or up-
ward by the lower transducer. We also set up two
other transducers. Sound direction of them was hori-
zontal or parallel to the interface. One was for longi-
tudinal sound and the other was for transverse sound.
Figure 1 is the shape of a solid-liquid interface
while sound wave was applied from the liquid side.
Melting was induced at around the center of the cell
where the sound wave was actually applied. Tempera-
ture was about 150 mK and typical sound power den-
sity for these figures was about 200 W/m2. When
sound was applied from the solid side at the same tem-
perature, the crystal was grown as shown in Fig. 2. So
the interface was pushed to the direction of sound at
these low temperatures. We could induce both crystal-
lization and melting easily by changing the direction
of acoustic wave.
We also applied sound horizontally and checked
how the interface responded to it. Sound direction was
parallel to the interface in this case. Longitudinal
sound was applied from left to right at around 150 mK
and it stochastically induced melting (Fig. 3) or crys-
tallization (Fig. 4) in the vicinity of the transducer.
These observations support the idea that acoustic radi-
ation pressure was the cause of the interface motion.
The interface motion was driven not because solid or
liquid were thermodynamically favored but because
the interface felt the force directly from the sound
wave. Initial tiny slope of the interface probably de-
termined whether crystallization or melting was in-
duced. When transverse sound was applied from right
to left it always induced crystallization (Fig. 5) be-
cause it can propagate only through the solid.
Using a high-speed CCD camera interface dyna-
mics were recorded during and after a sound pulse.
Sound pulse of 1 msec duration was applied at t = 0
from the liquid side. First it induced downward mo-
tion of the interface. Then the interface oscillated
around the equilibrium position as shown in Fig. 6.
White rectangle in the first image is the region shown
in the following. Temperature was 380 mK in this
case. When the sound pulse was applied from the solid
664 Fizika Nizkikh Temperatur, 2003, v. 29, No. 6
R. Nomura, Y. Suzuki, S. Kimura, Y. Okuda, and S. Burmistrov
Fig. 2. Crystallization of 4He induced by sound wave
from the solid side.
Fig. 3. Melting of 4He crystal induced by sound wave
from left to right.
Fig. 4. Crystallization of 4He induced by sound wave
from left to right.
Fig. 5. Crystallization of 4He induced by transverse sound
wave from right to left.
Manipulation of solid-liquid interface of 4He by acoustic radiation pressure
Fizika Nizkikh Temperatur, 2003, v. 29, No. 6 665
Fig. 6. High-speed dynamics of solid-liquid interface trig-
gered by sound pulse from the liquid side. White rectangle
in the first image is the region shown in the following.
Numbers indicate time after the sound pulse in �sec.
Fig. 7. High-speed dynamics of solid-liquid interface trig-
gered by sound pulse from the solid side. White rectangle
in the first image is the region shown in the following.
Numbers indicate time after the sound pulse in �sec.
side it induced upward motion of the interface first as
shown in Fig. 7. These observations demonstrated that
interface oscillation or crystallization wave could be
excited by the acoustic pulse.
When we make a small 4He crystal and apply sound
wave to it what will happen? Will it be completely
melted or move to the sound direction? It will be very
interesting to see if we can move not only the
solid-liquid interface but also crystal itself. If this is
possible radiation pressure can be used to manipulate
4He crystal in the microgravity.
SUMMARY
We demonstrated that solid-liquid interface of 4He
could be manipulated by sound wave. The interface
motion, which was triggered by acoustic radiation
pressure, was recorded by using a high-speed CCD
camera. It is our future theme to check whether we
can manipulate not only the interface but also the
crystal itself by acoustic radiation pressure.
Acknowledgement
This study is partly supported by «Ground-based
Research Announcement for Space Utilization» pro-
moted by Japan Space Forum.
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666 Fizika Nizkikh Temperatur, 2003, v. 29, No. 6
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