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A PULSED EDDY CURRENT TEST SYSTEM USING REFLECTED FIELDS
An eddy current test system is described in which the test information is detected as a series of fields reflected from the metal surface and interior. Pulsed electromagnetic fields are caused to impinge upon the test specimen. These fields are restricted to a small cross sectional area over a path in space long enough to be useful for test purposes by devices called mask-apenture assemblies. This approach provides a number of advantages over conventional eddy current methods of comparable capabilities, including superior surface resolution, a reduction in circuit complexity, and an improvement in stability and reliability. Various applications and test results are discussed. (auth)
Date:
June 11, 1962
Creator:
Renken, C. J.
System:
The UNT Digital Library
HELIUM THREE
A review is given of the present state of knowledge concerning the condensed phases of He{sup 3}. Attention is confined to the pure substance, and emphasis is placed upon the theoretical understanding of the material.
Date:
September 11, 1962
Creator:
Sessler, Andrew M.
System:
The UNT Digital Library