Accession Number : ADA211281

Title :   Acoustic Studies of New Materials: Quasicrystals, Low-Loss Glasses, and High Tc Superconductors.

Descriptive Note : Annual summary rept. 1 Oct 88-30 Sep 89,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF PHYSICS

Personal Author(s) : Maynard, Julian D.

Report Date : 01 AUG 1989

Pagination or Media Count : 19

Abstract : The goals of this project involve the development and application of new techniques in acoustics. The goals are: a) to study the properties of single crystal high temperature superconductor oxide materials with ultrasonic measurements; b) to study the properties of quasicrystals using ultrasound and acoustic analog systems; and c) to develop and apply a new resonant photoacoustic technique to measure optical absorption in very low-loss glasses and crystals. Major accomplishments include the development of a new method of ultrasound measurement which permits the determination of all of the independent elastic constants of very small samples (a few hundred microns in size), and the development and test of a new technique for measuring optical absorption with more than an order of magnitude improvement in sensitivity over existing methods. Keywords: Acoustics ultrasound quasicrystal superconductor; Photoacoustic; Optical absorption. (jhd)

Descriptors :   *ACOUSTIC PROPERTIES, *ACOUSTOOPTICS, *CRYSTALS, *GLASS, *SUPERCONDUCTORS, RADIATION ABSORPTION, ACOUSTICS, ANALOG SYSTEMS, CONSTANTS, ELASTIC PROPERTIES, LOW LOSS, MEASUREMENT, OPTICAL PROPERTIES, SAMPLING, ULTRASONICS.

Subject Categories : Acoustics
      Acoustooptic and Optoacoustic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE