This paper describes the application of continuous wave, rnultifrequency eddy current methods to nondestructive inspection of materials. A generalized description of the technology is included, follow~d by s~me ~esults o~t~ined in_mul~i~requency_examination of tubing. A major advantage of multifrequency ~nspect1on 1s the a~1~1ty to d1scr1m1nate aga1nst unwanted test parameters. The discriminati...

The concepts of laser-plasma based accelerator and injector are discussed here. Recent tests done at LOA as well as design studies of high-quality few GeV’s electron beam with low energy spread (1%) are presented. These laser-produced particle beams have a number of interesting properties and could lend themselves to applications in many fields, including medicine (radiotherapy), chemistry (rad...

We deal with a boundary detection problem arising in nondestructive testing of materials. The problem consists in recovering an unknown portion of the boundary, where a Robin condition is satisfied, with the use of a Cauchy data pair collected on the accessible part of the boundary. We combine a linearization argument with a Tikhonov regularization approach for the local reconstruction of the u...

We report the continuous and partially nondestructive measurement of optical photons. For a weak light pulse traveling through a slow-light optical medium (signal), the associated atomic-excitation component is detected by another light beam (probe) with the aid of an optical cavity. We observe strong correlations of g_{sp}^{(2)}=4.4(5) between the transmitted signal and probe photons. The obse...