Photoacoustic Measurements of Thermal Diffusivity. Description of the "Drum Effect"

F. Lepoutre; P. Charpentier; C. Boccara; C. Boccara; D. Fournier; D. Fournier

doi:10.1364/PAS.1981.MA3

Second International Meeting on Photoacoustic Spectroscopy
Technical Digest Series (Optica Publishing Group, 1981),
paper MA3
•https://doi.org/10.1364/PAS.1981.MA3

Photoacoustic Measurements of Thermal Diffusivity. Description of the "Drum Effect"

F. Lepoutre, P. Charpentier, C. Boccara, and D. Fournier

Photoacoustic Spectroscopy 1981

Berkeley, California United States
22–25 June 1981
ISBN:

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Physics of Photoacoustic Detection (MA)

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F. Lepoutre, P. Charpentier, C. Boccara, and D. Fournier, "Photoacoustic Measurements of Thermal Diffusivity. Description of the "Drum Effect"," in Second International Meeting on Photoacoustic Spectroscopy, Technical Digest Series (Optica Publishing Group, 1981), paper MA3.

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Abstract

For a thermally thick sample (thickness ℓ_s, thermal conductivity k_s, specific heat C_s) the R-G theory /1/ gives pressure variations δp₁ detected on the front surface of a sample (fig 1a)depending on the modulation frequency f as fig 2 shows for the modulus |δP₁|.

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