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Nonlinear sound generation by high energy particles. [Debye-like modes, temperature dependence, proton deposition mechanism]

Description: In connection with Project DUMAND, the proposal to utilize the ocean as a giant acoustic detector of neutrinos, the applicability of a recent theory of thermoacoustic arrays (Peter J. Westervelt and Richard S. Larson, J. Acoust. Soc. Am. 54, 121 (1973)) is studied. In the static case or at very low frequencies, about 10% of the coefficient of thermal expansion for water at 20/sup 0/C can be attributed to Debye-like modes. Debye-like modes generate sound via the nonlinear mechanism responsible f… more
Date: January 1, 1978
Creator: Westervelt, P. J.
Partner: UNT Libraries Government Documents Department
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Hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah: Petrographic characterization of the alteration to 2 kilometers depth

Description: Hydrothermal alteration in drill cuttings from Thermal Power drillhole 14-2, Roosevelt Hot Springs Thermal area, has been studied petrographically. The hole is sited in alluvium approximately 1.6 km southeast of the old Resort and was rotary drilled to a depth of 1866.0 m. The exact hole location is 2310 FNL, 350 FWL, Sec. 2, Twp 27S, Rge 9W, elevation 1908.5 m. Core was extracted from 792.5 to 795.5 m. Thin sections were made from samples at 15.2 m intervals of drill cuttings collected at 1.5 … more
Date: April 1, 1978
Creator: Ballantyne, J.M. & Parry, W.T.
Partner: UNT Libraries Government Documents Department
open access

Acoustic emission from hydrogen saturated Type 304L stainless steel

Description: Acoustic emission is attributed to energy release within a material body by localized plastic deformation or failure processes. The elastic stress waves may come from slip band formation, mechanical twinning, martensite transformation, or crack propagation. Each of these processes has slightly different acoustic characteristics allowing for easy identification. Acoustic emission was monitored during tensile tests of Type 304L austenitic stainless steel to explore the applicability of the techni… more
Date: January 1, 1978
Creator: Caskey, G. R., Jr.
Partner: UNT Libraries Government Documents Department
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