Inelastic deformation of minerals and rocks is associated with activation of various defects such as fractures, twins, and dislocations. Active and passive ultrasound probes are potential tools to examine the nature of these defects under a broad range of pressure and temperature conditions. Here, we report on the development of an ultrasound probe array that allows us to monitor deforming samples in a high-pressure, high-temperature solid medium apparatus (a modified Griggs rig). We utilize several broadband miniature piezoelectric sensors that are placed above and below the sample to record acoustic emissions accompanying deformation and determine their locations in 1D. The emissions are recorded at 50 MS/s with a 12 bit resolution. Proper grounding and electric insulation of the sensors, together with optimized power delivery from the heating system, tremendously reduces electromagnetic interference and allows for a background noise level of ≈90 mV at a full range of ±2 V and 60 dB amplification. The system is capable of recording acoustic waves from 80 kHz to 2.5 MHz at sample temperatures up to 1100 °C and confining pressure up to 2.5 GPa.
Skip Nav Destination
CHORUS
Article navigation
August 2020
Research Article|
August 25 2020
An ultrasound probe array for a high-pressure, high-temperature solid medium deformation apparatus Available to Purchase
H. O. Ghaffari
;
H. O. Ghaffari
Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences
, Cambridge, Massachusetts 02139, USA
Search for other works by this author on:
M. Pec
M. Pec
a)
Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences
, Cambridge, Massachusetts 02139, USA
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
H. O. Ghaffari
Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences
, Cambridge, Massachusetts 02139, USA
Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences
, Cambridge, Massachusetts 02139, USA
a)Author to whom correspondence should be addressed: [email protected]
Rev. Sci. Instrum. 91, 085117 (2020)
Article history
Received:
February 06 2020
Accepted:
August 02 2020
Citation
H. O. Ghaffari, M. Pec; An ultrasound probe array for a high-pressure, high-temperature solid medium deformation apparatus. Rev. Sci. Instrum. 1 August 2020; 91 (8): 085117. https://doi.org/10.1063/5.0004035
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Overview of the early campaign diagnostics for the SPARC tokamak (invited)
M. L. Reinke, I. Abramovic, et al.
Controlled partial gravity platform for milligravity in drop tower experiments
Kolja Joeris, Matthias Keulen, et al.
An instrumentation guide to measuring thermal conductivity using frequency domain thermoreflectance (FDTR)
Dylan J. Kirsch, Joshua Martin, et al.
Related Content
On calibration of piezoelectric sensors with laser doppler vibrometer
J. Acoust. Soc. Am. (October 2021)
A high pressure, high temperature gas medium apparatus to measure acoustic velocities during deformation of rock
Rev. Sci. Instrum. (May 2022)
Wide‐band optical–mechanical system for measuring acoustic emissions at high temperature and pressure
Rev. Sci. Instrum. (July 1977)
Creating a high temperature environment at high pressure in a gas piston cylinder apparatus
Rev. Sci. Instrum. (January 2012)