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Donald J. WeidnerToll Professor August 2022 to Present A.B., Harvard University, 1967 |
Professor Weidner's research interests focus on mineral physics. The major premise of mineral physics is that we can understand more about the Earth by understanding the properties of the materials (rocks) that make up the Earth. We need to work with seismology and geodynamics to complete the process.
Weidner’s research program has been centered on using synchrotron sources to aid in defining mineral properties at high pressure and temperature. He and his group have developed several high pressure devices that allow synchrotron signals to sample the material of interest that is held at the extreme conditions of the Earth’s interior. They have also extended the data so as to be able to measure acoustic velocity (to compare with seismic velocity), stress and strain rate (to help define mineral ‘viscosity’), and low frequency volume changes (to define frequency dependence and attenuation of seismic velocity).
This group is in charge of running a facility at the National Synchrotron Light Source II at Brookhaven National Laboratories and one at the Advanced Photon Source at Argonne National Laboratories. These facilities are available for researchers from around the world to carry out experiments on the facilities that have been home grown at Stony Brook.
Selected Publications
Wang, Y., L.X. Wen, and D.J. Weidner, Composition of Mars constrained using geophysical observations and mineral physics modeling. Physics of the Earth and Planetary Interiors, 2013. 224: p. 68-76.
Li, L. and D.J. Weidner, Effect of dynamic melting on acoustic velocities in a partially molten peridotite. Physics of the Earth and Planetary Interiors, 2013. 222: p. 1-7.
Hunt, S.A., D.J. Weidner, R.J. McCormack, M.L. Whitaker, E. Bailey, L. Li, M.T. Vaughan, and D.P. Dobson, Deformation T-Cup: A new multi-anvil apparatus for controlled strain-rate deformation experiments at pressures above 18 GPa. Review of Scientific Instruments, 2014. 85(8).
Li, L. and D.J. Weidner, Detection of melting by X-ray imaging at high pressure. Review of Scientific Instruments, 2014. 85(6).
Du, W., L. Li, and D.J. Weidner, Experimental observation on grain boundaries affected by partial melting and garnet forming phase transition in KLB-1 peridotite. Physics of the Earth and Planetary Interiors, 2014. 228: p. 287-293.
Hong, X.G., T.S. Duffy, L. Ehm, and D.J. Weidner, Pressure-induced stiffness of Au nanoparticles to 71 GPa under quasi-hydrostatic loading. Journal of Physics-Condensed Matter, 2015. 27(48).
Li, L. and D.J. Weidner, In situ analysis of texture development from sinusoidal stress at high pressure and temperature. Review of Scientific Instruments, 2015. 86(12).
Weidner, D.J. and L. Li, Kinetics of melting in peridotite from volume strain measurements. Physics of the Earth and Planetary Interiors, 2015. 246: p. 25-30.
Weidner, D.J. and L. Li, Theory & Practice - Methods for the Study of High P/T Deformation & Rheology, in Treatise on Geophysics, 2nd Edition, L. Stixrude and D.P. Geoffrey, Editors. 2015, Elseviere. p.18.
Hong, X.G., L. Ehm, Z. Zhong, S. Ghose, T.S. Duffy, and D.J. Weidner, High-energy X-ray focusing and applications to pair distribution function investigation of Pt and Au nanoparticles at high pressures. Scientific Reports, 2016. 6.
Hong, X.G., L. Ehm, Z. Zhong, S. Ghose, T.S. Duffy, and D.J. Weidner, High-energy X-ray focusing and high-pressure pair distribution function measurement, in Icxom23: International Conference on X-Ray Optics and Microanalysis, J. Thieme and D.P. Siddons, Editors. 2016.
Hong, X.G., L. Ehm, Z. Zhong, S. Ghose, T.S. Duffy, and D.J. Weidner, High-pressure pair distribution function (PDF) measurement using high-energy focused X-ray beam, in Proceedings of the 12th International Conference on Synchrotron Radiation Instrumentation, Q. Shen and C. Nelson, Editors. 2016.
Hong, X.G., T.S. Duffy, L. Ehm, and D.J. Weidner, Absolute X-ray energy calibration and monitoring using a diffraction-based method, in Proceedings of the 12th International Conference on Synchrotron Radiation Instrumentation, Q. Shen and C. Nelson, Editors. 2016.
Cheung, S. N. C.; Weidner, D. J.; Li, L.; Meredith, P. G.; Chen, H.; Whitaker, M. L.; Chen, X. (2017) Stress distribution during cold compression of a quartz aggregate using synchrotron X-ray diffraction: observed yielding, damage and grain crushing. Journal of Geophysical Research (Solid Earth), 122 (4) 2724-2735.
DJ Weidner, L LI, ML Whitaker, R Triplett, “Ultrasonic Acoustic Velocities During Partial Melting of a Mantle Peridotite KLB-1”, Journal of Geophysical Research: Solid Earth, 123 (2018) 1252-1261
CSN Cheung, DJ Weidner, L LI, PG Meredith, HY Chen, ML Whitaker, XY Chen, “Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction”, JOVE, 135, 2018, Doi: 10.3791/57555
L Li, ML Whitaker, DJ Weidner, “Note: Elastic wave velocity measurement using ultrasonic system with two-reflectors” Review of Scientific Instruments, 89 (8) (2018) Article # 086105
L Li, DJ Weidner, ML Whitaker, R Triplett, “Ultrasonic Acoustic Wave Velocities of Neighborite (NaMgF3) Across Orthorhombic to Cubic Phase Boundary at High P-T”, Physics of the Earth and Planetary Interiors, 283 (2018) 38-42.
Li, L. and D. J. Weidner (2019). "Full waveform analysis for high pressure ultrasonic measurements." Review of Scientific Instruments 91(3): 3.
Li, L., D. J. Weidner, Haiyan Chen, Richard Triplett (2020). "Bulk modulus measurement at mHz frequencies and high-pressure using synchrotron x-ray radiation." Review of Scientific Instruments 91(11): 3.
Weidner, D. J. and L. Li (2021). "Low frequency bulk modulus of partially molten peridotite, KLB-1." Physics of the Earth and Planet Interiors 313: 8.