Response of lead metaniobate acoustic emission sensors to gamma irradiation

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 /spl sim/1 MGy revea...

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Veröffentlicht in:IEEE transactions on nuclear science 2005-12, Vol.52 (6), p.2583-2590
Hauptverfasser: Holbert, K.E., Sankaranarayanan, S., McCready, S.S.
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Sankaranarayanan, S.
McCready, S.S.
description 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 /spl sim/1 MGy revealed a capacitance increase and PE voltage (g/sub 33/) coefficient decrease with gamma dose. The planar coupling factor (k/sub p/) and mechanical quality factor (Q/sub m/) exhibited small reductions. The AE sensors were also subjected to nuclear radiation from a pulse reactor.
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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 /spl sim/1 MGy revealed a capacitance increase and PE voltage (g/sub 33/) coefficient decrease with gamma dose. The planar coupling factor (k/sub p/) and mechanical quality factor (Q/sub m/) exhibited small reductions. The AE sensors were also subjected to nuclear radiation from a pulse reactor.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TNS.2005.860708</doi><tpages>8</tpages></addata></record>
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source IEEE Electronic Library (IEL)
subjects Acoustic emission
Acoustic sensors
Capacitance
Capacitive sensors
Electric potential
Ferroelectric materials
Gamma radiation
Gamma ray detectors
Gamma rays
Lead
lead metaniobate
Mechanical sensors
Nuclear radiation
Nuclear reactor components
piezoelectric transducers
Polyethylenes
pulse reactor testing
radiation effects
Sensors
Voltage
title Response of lead metaniobate acoustic emission sensors to gamma irradiation
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