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Temperature Measurements in Solids by Phonon Interaction

IP.com Disclosure Number: IPCOM000051748D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Capani, PM: AUTHOR

Abstract

If an acoustic wave is passed through a sample, the wave interacts with the sample. The signature which this interaction leaves on the wave as it passes through the sample is directly related to the energy in the sample. Using this principle, it is possible to measure the temperature of a sample by passing an acoustic wave through the sample and examining the wave as it emerges from the sample.

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Temperature Measurements in Solids by Phonon Interaction

If an acoustic wave is passed through a sample, the wave interacts with the sample. The signature which this interaction leaves on the wave as it passes through the sample is directly related to the energy in the sample. Using this principle, it is possible to measure the temperature of a sample by passing an acoustic wave through the sample and examining the wave as it emerges from the sample.

More specifically, the temperature of a sample can be determined by passing a pulse of bulk acoustic wave energy throughout the volume of a sample. After propagating in the solid, the wave is collected and its energy content is analyzed. Thermal noise due to the equilibrium temperature of the solid will alter the wave during the phonon-lattice site interaction. This component of the mechanical energy can be analyzed to determine the absolute temperature of the sample.

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