DocumentCode :
819116
Title :
Response of lead metaniobate acoustic emission sensors to gamma irradiation
Author :
Holbert, Keith E. ; Sankaranarayanan, Sriram ; McCready, Steven S.
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
Volume :
52
Issue :
6
fYear :
2005
Firstpage :
2583
Lastpage :
2590
Abstract :
Piezoelectric (PE) acoustic emission (AE) sensors were exposed to hundreds of kGy from Co-60 gamma rays. Recalibration of gamma-irradiated sensors showed a sensitivity decline of 8.4% per 100 kGy. Exposure of lead metaniobate disc specimens, the sensor ferroelectric material, to ∼1 MGy revealed a capacitance increase and PE voltage (g33) coefficient decrease with gamma dose. The planar coupling factor (kp) and mechanical quality factor (Qm) exhibited small reductions. The AE sensors were also subjected to nuclear radiation from a pulse reactor.
Keywords :
acoustic emission; acoustic transducers; calibration; gamma-ray effects; lead compounds; piezoelectric transducers; Co-60 gamma rays; PbNb2O6; capacitance; ferroelectric material; gamma-irradiated sensors; lead metaniobate acoustic emission sensors; mechanical quality factor; nuclear radiation; piezoelectric acoustic emission sensors; planar coupling factor; pulse reactor; recalibration; Acoustic emission; Acoustic sensors; Capacitance; Capacitive sensors; Ferroelectric materials; Gamma ray detectors; Gamma rays; Lead; Mechanical sensors; Voltage; Gamma radiation; lead metaniobate; piezoelectric transducers; pulse reactor testing; radiation effects;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.2005.860708
Filename :
1589242
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=819116
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