Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Laser generated ultrasound (LGU) is now established as an important non contact technique. The use of pulsed lasers for LGU by direct illumination of a sample surface is a well documented method [1–6]. Aside from the comparatively low repetition rates of lasers suitable for LGU, a factor that limits their use is surface damage may be caused. LGU usually occurs between two extreme regimes, the ‘ablative’ regime (intense longitudinal waves generated at the expense of surface damage) and the ‘thermoelastic’ regime (damage free but relatively inefficient source for normal incidence waves).

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16B

Chapter

Chapter 7: New Inspection Procedures

Section

New Techniques

Pages

1839-1844

DOI

10.1007/978-1-4615-5947-4_240

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Damage Free Generation of Ultrasound by an Expanding Laser Produced Plasma

Brunswick, ME

Laser generated ultrasound (LGU) is now established as an important non contact technique. The use of pulsed lasers for LGU by direct illumination of a sample surface is a well documented method [1–6]. Aside from the comparatively low repetition rates of lasers suitable for LGU, a factor that limits their use is surface damage may be caused. LGU usually occurs between two extreme regimes, the ‘ablative’ regime (intense longitudinal waves generated at the expense of surface damage) and the ‘thermoelastic’ regime (damage free but relatively inefficient source for normal incidence waves).