Norio Nakagawa

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We report on thermal noise from the internal friction of dielectric coatings made from alternating layers of Ta 2 O 5 and SiO 2 deposited on fused silica substrates. We present calculations of the thermal noise in gravitational wave interferometers due to optical coatings, when the material properties of the coating are different from those of the substrate(More)
Eddy current inspection is widely used in nondestructive evaluation to detect cracks in metal structures. The impedance plane measurement response collected using our motion controlled eddy current inspection system, are used in the analysis. A scalar reduction from the impedance plane response is used to minimize human-factor variation. We apply a noise(More)
The Center focuses on the research and development of new theories and techniques for use in quantitative nondestructive evaluation. The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the information presented herein. The opinions, findings and conclusions expressed in this publication are(More)
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