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SUMMARY:Piezoelectric Probes: Can They Be Trusted? - C E Lloyd\, PCS Fract
 ure and Shock Physics Group
DTSTART:20060511T150000Z
DTEND:20060511T160000Z
UID:TALK4897@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:Knowledge of time-resolved pressures\, densities of spray and 
 spall is required for the full understanding of ejecta production. One met
 hod of studying spray and spall is through the use of piezoelectric probes
 . A widely-used piezoelectric probe is manufactured by Dynasen Inc.   The 
 probes performance in a range of environments will be discussed\, includin
 g gas-gun generated sprays. Spray densities obtained via X-ray imaging and
  high-speed photography are compared with the probe density measurements t
 o give an indication of how well the probes perform. Various probe shieldi
 ng arrangements are discussed\, and the importance of impedance mismatches
  between the impacting material and the PZT is highlighted.
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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