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 (k_p) and mechanical quality factor (Q_m) 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