Fast hypersonic velocity measurement by Brillouin scattering from induced phonons

2012 ◽  
Author(s):  
Takeshi Sugimoto ◽  
Takahiko Yanagitani ◽  
Shinji Takayanagi ◽  
Mami Matsukawa
Keyword(s):  
Velocity Measurement ◽  
Brillouin Scattering ◽  
Hypersonic Velocity

Sound velocity measurement by ultrasonic and Brillouin scattering techniques in compounds with matlockite structure

1998 ◽  
Vol 30 (2) ◽  
pp. 235-240 ◽  
Author(s):  
Frédéric Decremps ◽  
Myriam Fischer ◽  
Alain Polian ◽  
Manuel Sieskind
Keyword(s):  
Sound Velocity ◽  
Velocity Measurement ◽  
Brillouin Scattering

Rapid wave velocity measurement by Brillouin scattering using artificially induced phonon

2016 ◽  
Vol 140 (4) ◽  
pp. 3204-3204 ◽  
Author(s):  
Yoshiaki Shibagaki ◽  
Masahiko Kawabe ◽  
Shinji Takayanagi ◽  
Kazuma Mori ◽  
Takahiko Yanagitani ◽  
...  
Keyword(s):  
Wave Velocity ◽  
Velocity Measurement ◽  
Brillouin Scattering

scholarly journals Determination of the Hypersonic Velocities in the Molten Salts NaNO3 and KNO3

1974 ◽  
Vol 29 (3) ◽  
pp. 469-472 ◽  
Author(s):  
Silas E. Gustafsson ◽  
H. E. Gunilla Knape ◽  
Lena M. Torell
Keyword(s):  
Molten Salts ◽  
Brillouin Scattering ◽  
Scattered Light ◽  
Frequency Region ◽  
Relaxation Frequency ◽  
Ultrasonic Velocities ◽  
Hypersonic Velocity ◽  
Fabry Perot ◽  
Scattering Measurements

Hypersonic velocities in the molten salts NaNO3 and KNO3 have been obtained by Brillouin scattering measurements. A He-Cd laser, 4416 Å, was used as a radiation source and the scattered light was analyzed with a pressure-scanned Fabry-Perot spectrometer. The temperature dependence of the sound velocity was determined in a temperature range covering some 100° above the melting point of the investigated salts. The obtained hypersonic velocity for NaNO3 was about the same and for KNO3 greater than reported ultrasonic velocities indicating that the measurements are performed in a frequency region below any possible relaxation frequency for NaNO3 and above some possible relaxation frequencies for KNO3

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