New Nonlinear Phenomena in Focused Acoustic Beam in Pressurized Superfluid ^4He
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概要
- 論文の詳細を見る
We have studied the propagation properties of a focused acoustic beam insuperfluid 'He at 300 mK under several pressures and observed new nonlinearphenomena under pressures higher than 18 atm. Under these high pressures (normaldispersion region), the received power is increased in proportion to the power inputfor the low-power region, but it is depleted rapidly after the saturation for higherpower input. It exhibits several sharp dips for further increased power. Thisnonlinear phenomenon is a completely new one, so there is as yet no explanatorytheory. We propose a possible mechanism to explain it which consists of twononlinear processes.[superfluid helium 4, quantum liquid, phonon dispersion, phonon scattering, ]l acoustic microscopel
- 社団法人日本物理学会の論文
- 1991-02-15
著者
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Matsumoto Koichi
Department of Medicine, Division of Nephrology and Endocrinology, Nihon University School of Medicin
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SAITO TAKEHIKO
Department of Virology I, National Institute of Infectious Diseases
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Saito Takehiko
Department Of Mechanical And System Engineering Kyoto Institute Of Technology
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OKUDA Yuichi
Department of Applied Physics, Tokyo Institute of Technology
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Saito T
Department Of Mechanical And System Engineering Kyoto Institute Of Technology
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KARAKI Koichi
OLYMPUS Opt.Co.Ltd.,
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Okuda Y
Department Of Applied Physics Tokyo Institute Of Technology
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Okuda Yuichi
Department Of Applied Physics Faculty Of Science Tokyo Institute Of Technology
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Karaki K
Olympus Optical Co. Ltd.
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Okuda Yuichi
Department Of Applied Physics Tokyo Institute Of Technology
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Saito Takehiko
Department Of Animal Science Faculty Of Agriculture Kobe University
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Matsumoto Koichi
Department Of Applied Physics Tokyo Institute Of Technology
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OKUDA Yuichi
Department of Applied Physics,Tokyo Institute of Technology
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