The Library
Effect on ultrasonic generation of a backplate in electromagnetic acoustic transducers
Tools
Tools
Tools
Jian, Xiaoming, Dixon, S., Edwards, R. S. (Rachel S.), Quirk, K. and Baillie, Iain (2007) Effect on ultrasonic generation of a backplate in electromagnetic acoustic transducers. Journal of Applied Physics, Vol.102 (No.2). article no. 024909 . doi:10.1063/1.2756090 ISSN 0021-8979.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1063/1.2756090
Abstract
When constructing an electromagnetic acoustic transducer (EMAT), it is often desirable to incorporate a permanent magnet behind the EMAT coil and an electrically conducting backplate between the coil and the magnet to prevent ultrasonic generation in the magnet by the current in the EMAT coil. This paper investigates the effect of the backplate on the generation of the eddy current and the resultant ultrasonic wave in the sample. We develop analytical expressions for the important physical phenomena and show that the backplate tends to reduce the amplitude of the eddy current and ultrasonic wave generated in the sample. This is dependent on the liftoff between the coil and the sample, and the air gap between the coil and the backplate. Results from modeling have been verified by our experimental measurements. (c) 2007 American Institute of Physics.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Science > Physics |
||||
| Library of Congress Subject Headings (LCSH): | Ultrasonic waves, Electroacoustic transducers, Electromagnetism | ||||
| Journal or Publication Title: | Journal of Applied Physics | ||||
| Publisher: | American Institute of Physics | ||||
| ISSN: | 0021-8979 | ||||
| Official Date: | 15 July 2007 | ||||
| Dates: |
|
||||
| Volume: | Vol.102 | ||||
| Number: | No.2 | ||||
| Number of Pages: | 6 | ||||
| Page Range: | article no. 024909 | ||||
| DOI: | 10.1063/1.2756090 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
