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- Title
Detection of nanosecond optoacoustic pulses in steel.
- Authors
Kozhushko, V.; Paltauf, G.; Krenn, H.
- Abstract
The optoacoustic transformation of 5-ns laser pulses was used to excite broadband longitudinal acoustic pulses in a 0.4-mm-thick steel plate. An electromagnetic acoustic transducer that incorporated a flat wire coil with a diameter of 5 mm and an amplifier was proposed as a device for contactless ultrasound detection. A permanent cylindrical magnet and a coil close to the printed-circuit board of an operational amplifier were placed on one side of the sample, thus allowing the detection of the alternating electromagnetic field produced by pressure pulses excited on the opposite side. The frequency spectrum of detected pulses ranged from 5 to 200 MHz.
- Subjects
ACOUSTOOPTICAL devices; LASER pulses; IRON &; steel plates; ELECTROACOUSTIC transducers; ULTRASONIC imaging; BROADBAND amplifiers; ELECTROMAGNETIC fields
- Publication
Acoustical Physics, 2013, Vol 59, Issue 2, p250
- ISSN
1063-7710
- Publication type
Article
- DOI
10.1134/S1063771013020085