The transverse acoustic response of $ superfluid^{3} $He-B
Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Kalbfeld, S. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1995 |
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| Schlagwörter: |
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| Anmerkung: |
© Plenum Publishing Corporation 1995 |
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| Übergeordnetes Werk: |
Enthalten in: Journal of low temperature physics - Kluwer Academic Publishers-Plenum Publishers, 1969, 98(1995), 5-6 vom: März, Seite 549-589 |
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| Übergeordnetes Werk: |
volume:98 ; year:1995 ; number:5-6 ; month:03 ; pages:549-589 |
| Links: |
|---|
| DOI / URN: |
10.1007/BF00752281 |
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| Katalog-ID: |
OLC2036771858 |
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| 245 | 1 | 0 | |a The transverse acoustic response of $ superfluid^{3} $He-B |
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| 520 | |a Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. | ||
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| 650 | 4 | |a Sound Frequency | |
| 650 | 4 | |a Fermi Velocity | |
| 700 | 1 | |a Kucera, D. M. |4 aut | |
| 700 | 1 | |a Ketterson, J. B. |4 aut | |
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10.1007/BF00752281 doi (DE-627)OLC2036771858 (DE-He213)BF00752281-p DE-627 ger DE-627 rakwb eng 530 VZ Kalbfeld, S. verfasserin aut The transverse acoustic response of $ superfluid^{3} $He-B 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 1995 Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. Sound Velocity Acoustic Impedance Transverse Mode Sound Frequency Fermi Velocity Kucera, D. M. aut Ketterson, J. B. aut Enthalten in Journal of low temperature physics Kluwer Academic Publishers-Plenum Publishers, 1969 98(1995), 5-6 vom: März, Seite 549-589 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:98 year:1995 number:5-6 month:03 pages:549-589 https://doi.org/10.1007/BF00752281 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_32 GBV_ILN_40 GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2192 GBV_ILN_4126 GBV_ILN_4306 GBV_ILN_4323 GBV_ILN_4700 AR 98 1995 5-6 03 549-589 |
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10.1007/BF00752281 doi (DE-627)OLC2036771858 (DE-He213)BF00752281-p DE-627 ger DE-627 rakwb eng 530 VZ Kalbfeld, S. verfasserin aut The transverse acoustic response of $ superfluid^{3} $He-B 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 1995 Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. Sound Velocity Acoustic Impedance Transverse Mode Sound Frequency Fermi Velocity Kucera, D. M. aut Ketterson, J. B. aut Enthalten in Journal of low temperature physics Kluwer Academic Publishers-Plenum Publishers, 1969 98(1995), 5-6 vom: März, Seite 549-589 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:98 year:1995 number:5-6 month:03 pages:549-589 https://doi.org/10.1007/BF00752281 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_32 GBV_ILN_40 GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2192 GBV_ILN_4126 GBV_ILN_4306 GBV_ILN_4323 GBV_ILN_4700 AR 98 1995 5-6 03 549-589 |
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10.1007/BF00752281 doi (DE-627)OLC2036771858 (DE-He213)BF00752281-p DE-627 ger DE-627 rakwb eng 530 VZ Kalbfeld, S. verfasserin aut The transverse acoustic response of $ superfluid^{3} $He-B 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 1995 Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. Sound Velocity Acoustic Impedance Transverse Mode Sound Frequency Fermi Velocity Kucera, D. M. aut Ketterson, J. B. aut Enthalten in Journal of low temperature physics Kluwer Academic Publishers-Plenum Publishers, 1969 98(1995), 5-6 vom: März, Seite 549-589 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:98 year:1995 number:5-6 month:03 pages:549-589 https://doi.org/10.1007/BF00752281 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_32 GBV_ILN_40 GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2192 GBV_ILN_4126 GBV_ILN_4306 GBV_ILN_4323 GBV_ILN_4700 AR 98 1995 5-6 03 549-589 |
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10.1007/BF00752281 doi (DE-627)OLC2036771858 (DE-He213)BF00752281-p DE-627 ger DE-627 rakwb eng 530 VZ Kalbfeld, S. verfasserin aut The transverse acoustic response of $ superfluid^{3} $He-B 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 1995 Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. Sound Velocity Acoustic Impedance Transverse Mode Sound Frequency Fermi Velocity Kucera, D. M. aut Ketterson, J. B. aut Enthalten in Journal of low temperature physics Kluwer Academic Publishers-Plenum Publishers, 1969 98(1995), 5-6 vom: März, Seite 549-589 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:98 year:1995 number:5-6 month:03 pages:549-589 https://doi.org/10.1007/BF00752281 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_32 GBV_ILN_40 GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2192 GBV_ILN_4126 GBV_ILN_4306 GBV_ILN_4323 GBV_ILN_4700 AR 98 1995 5-6 03 549-589 |
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10.1007/BF00752281 doi (DE-627)OLC2036771858 (DE-He213)BF00752281-p DE-627 ger DE-627 rakwb eng 530 VZ Kalbfeld, S. verfasserin aut The transverse acoustic response of $ superfluid^{3} $He-B 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 1995 Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. Sound Velocity Acoustic Impedance Transverse Mode Sound Frequency Fermi Velocity Kucera, D. M. aut Ketterson, J. B. aut Enthalten in Journal of low temperature physics Kluwer Academic Publishers-Plenum Publishers, 1969 98(1995), 5-6 vom: März, Seite 549-589 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:98 year:1995 number:5-6 month:03 pages:549-589 https://doi.org/10.1007/BF00752281 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_32 GBV_ILN_40 GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2192 GBV_ILN_4126 GBV_ILN_4306 GBV_ILN_4323 GBV_ILN_4700 AR 98 1995 5-6 03 549-589 |
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Enthalten in Journal of low temperature physics 98(1995), 5-6 vom: März, Seite 549-589 volume:98 year:1995 number:5-6 month:03 pages:549-589 |
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The transverse acoustic response of $ superfluid^{3} $He-B |
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the transverse acoustic response of $ superfluid^{3} $he-b |
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The transverse acoustic response of $ superfluid^{3} $He-B |
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Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. © Plenum Publishing Corporation 1995 |
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Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. © Plenum Publishing Corporation 1995 |
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Abstract For both normal and $ superfluid^{3} $He, the propagation of a collisionless transverse sound mode is predicted. The study of this mode in the normal fluid has been problematic: it travels only slightly faster than the Fermi velocity and is very highly attenuated. Early theoretical results suggested that transverse sound would not propagate in the superfluid and the experimental study of this mode was not actively pursued. However, recent theoretical work has predicted that this mode should indeed propagate, at sufficiently high frequencies and low temperatures, due to the interaction with the imaginary squashing mode. We present here an extensive experimental study of the transverse acoustic response in the B phase of $ superfluid^{3} $He. These measurements were performed on a short path length (30.5 microns) acoustic cavity, using a continuous wave, single ended, acoustic impedance technique. Simultaneous measurements were made of the longitudinal acoustic response, on an adjacent acoustic cavity of similar geometry. Both sound modes were excited at a frequency of 61 MHz. With this arrangement, well understood features in the longitudinal acoustic response were used as fiducial points for the study of heretofore ambiguous or unobserved features in the transverse acoustic response. As predicted by recent theoretical calculations, the transverse acoustic response was markedly different when the sound frequency was greater than the imaginary squashing mode frequency, as compared to when the sound frequency was less than the imaginary squashing mode frequency. At lower pressures the transverse acoustic response clearly exhibited the signatures of an evolving standing wave pattern (with the transverse sound velocity much less than the longitudinal sound velocity), and as such provides convincing evidence of a propagating transverse mode. © Plenum Publishing Corporation 1995 |
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