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Research Scientists

Muhetaer Aihaiti
Research Scientist
E-mail: maihaiti@ciw.edu
Phone: 202-478-8932

Muhetaer Aihaiti (Muhtar Ahart) conducts research in high-pressure physics is aimed largely at problems in ferroelectrics, relaxor ferroelectrics, polymers, and novel materials. He uses light scattering spectroscopy, synchrotron x-ray diffraction, and diamond anvil cell techniques to study the pressure effects on the classic ferroelectric, relaxor ferroelectric, and polymer materials, particularly, in investigations of elastic, piezo-properties and structural phase transitions in these materials. He is also active in multimegabar experiments on simple molecular systems using techniques such as synchrotron infrared spectroscopy.

 

John Armstrong
Microbeam Specialist
E-mail: jarmstrong@ciw.edu
Phone: 202-478-8918

John Armstrong has installed, maintained, and operated microprobes at NIST, Caltech, and Proctor & Gamble. He also has experience with several generations of analytical scanning electron microscopes, analytical scanning transmission electron microscopes, ion microprobes, x-ray diffraction and x-ray fluorescence equipment, and UHV field emission Auger electron and x-ray emission microprobes.

 

Maria Baldini
Research Scientist
E-mail: mbaldini@ciw.edu

Maria Baldini works on various beamlines at HPSynC and develops advanced x-ray techniques and instrumentation for use in high-pressure research. Her research focuses on understanding the effects of pressure on the physical properties of strongly correlated electron systems. She received her Ph.D in material science from the University of Sapienza, Rome, Italy in 2007.

 

Nabil Boctor
Emeritus Research Scientist
E-mail: nboctor@ciw.edu
Phone: 202-478-8949

Nabil Boctor researches phase equilibria, kinetics of mineral reactions, element partitioning between minerals and melts, and igneous and ore petrology. Boctor did his Ph.D. research with former Geophysical laboratory staff Gunnar Kullerud in the area of sulfide phase equilibria.

 

Reinhard Boehler
Senior Scientist
E-mail: rboehler@ciw.edu
Phone: 202-478-8950

Reinhard (Reini) Boehler works on a broad range of problems in high pressure science and technology, particularly those related to major energy challenges. His research interests include the thermal properties of metals at very high pressure, the adiabatic gradient, thermal expansivity of simple metals, as well as Earth mantle and core materials. He obtained a Ph.D and MS in mineralogy, and a BS in chemistry and physics from Universität Tübingen, Germany in 1974, 1970 and 1968.

 

Arunkamar Bommannavar
Beamline Control Scientist
E-mail: abommannavar@ciw.edu
Phone: 630-252-0497

Arun Bommannavar is the beamline control scientist at HPCAT. He is responsible for implementing EPICS controls for beamline control and data acquisition. His Ph.D. thesis was on studying Magnetic Relaxation Phenomenon in Ferrites using Mossbauer Spectroscopy.

 

Xiaojia Chen
Research Scientist
E-mail: xjchen@ciw.edu
Phone: 202-478-8924

Xiao-Jia Chen works in condensed matter physics. His research is focused on magnetism and superconductivity of materials under high pressure. Currently, he is coordinating the Spallation Neutrons and Pressure (SNAP) project - the exciting new high-pressure neutron science at the Spallation Neutron Source, Oak Ridge National Laboratory.

 

Paul Chow
Beamline Scientist
E-mail: pchow@ciw.edu
Phone: 630-252-4015

Paul Chow is a beamline scientist. He received a Ph.D. in Physics from University of Illinois and conducted research at the University of Houston. He spent 2 years at BL12XU, the Taiwan Beamline at SPring-8, designing and commissioning a spectrometer for inelastic x-ray scattering. Presently, he is a beamline scientist for HP-CAT at the spectroscopy station 16ID-D at the Advanced Photon Source. His interest is in electronic excitations in metals.

 

Katherine Crispin
MIcrobeam Specialist
E-mail: kcrispin@ciw.edu
Phone: 202-478-8986

Katherine's research is focused on diffusion in lower mantle minerals. She has investigated the effect of crystal field stabilization energy on diffusion rates of transition metals in periclase. She has developed, with Jim Van Orman, an equation combining various ionic traits (such as ionic radius and polarizability) to estimate diffusion rates in many minerals and compared them to published experimental data. She collaborates with Yingwei Fei and others on continuing high pressure and high temperature experimental work on diffusion in mantle and core minerals. She received a Ph.D. in Geological Sciences from Case Western Reserve University and a B.Sc. in Chemistry from Cedar Crest College.

 

Dionysis Foustoukos
Research Scientist
E-mail: dfoustoukos@ciw.edu
Phone: 202-478-8968

Research interests involve a compilation of theoretical, experimental and field approaches to understand the evolution of crustal fluids at a wide range of geological settings, and constrain the role of water in mass/heat transfer processes, and on the phase equilibria relationships between fluids and crystalline phases of Earth’s interior. Thus, research activities address a number of critical issues associated with deep carbon cycling, phase equilibria and thermodynamics of metastable mineral phases, stable isotope proxies of abiotic/biotic processes and life evolution/habitability at extreme conditions. For more details visit: http://people.gl.ciw.edu/dfoustoukos

 

Mihaela Glamoclija
Visiting Investigator
E-mail: mglamoclija@ciw.edu
Phone: 202-478-7970

Mihaela Glamoclija's research relates to general area of microbe-mineral interaction, utilization, and development of methods and concepts that may aid in the search, detection, and assessment of fossilized microbial life on Earth as a guide to the search for ancient life on Mars.

 

Stephen Gramsch
Research Scientist
E-mail: sgramsch@ciw.edu
Phone: 202-478-8939

The focus of Stephen Gramsch' research effort is to develop a crystal-chemical framework for correlating the structural, electronic and thermodynamic aspects of inorganic solids. He is a Research Scientist and serves as Coordinator of the Carnegie-DOE Alliance Center (CDAC). Steve is also active in the educational outreach mission of the Geophysical Laboratory. He supervises the NSF-sponsored Carnegie Summer Intern Program in Geoscience for undergraduate students and also teaches an Advanced Chemistry course at the César Chávez Public Charter High School, located on Capitol HIll in Washington, DC. Steve received his Ph.D. from the University of Chicago in 1994.

 

Malcolm Guthrie
Research Scientist
E-mail: mguthrie@ciw.edu
Phone: 630-252-4681

Malcolm Guthrie is the neutron scattering coordinator and a thrust leader in EFree.   He is charged with advancing energy frontier research in extreme pressure and temperature environments. His main scientific focus lies in the characterization of the structure of matter and its response to extremes of pressure and temperature. He obtained a PhD in physics from the University of Edinburgh, U.K. in 2002.

 

Kadek Hemawan
Research Scientist
E-mail: khemawan@ciw.edu
Phone: 202-478-8984

Kadek Hemawan is a postdoctoral research associate. He received his Ph.D in electrical engineering from Michigan State University. His research projects are focused on the optimization of single crystal diamond synthesis for higher growth rate and higher quality by means of microwave plasma chemical vapor deposition. His research activities include CVD reactor design and development at higher pressure, single crystal diamond deposition and characterization. He is working with Chih-Shiue Yan and Russell Hemley.

 

Valerie Hillgren
Research Scientist
E-mail: vhillgren@ciw.edu
Phone: 202-478-8927

Valerie Hillgren investigates the light elements in planetary cores, as well as core and mantle differentiation. She joins us from the Max Planck Institut für Chemie in Germany, where she explored the early evolution of the Earth through high pressure and temperature experimental studies utilizing a laser-heated diamond anvil cell.

 

Yoshio Kono
Beamline Scientist
E-mail: ykono@ciw.edu

Yoshio Kono is a Beamline Scientist at HPCAT. He is responsible for developing elastic wave velocity measurement by ultrasonic technique in conjunction with Paris-Edinburgh press and high-pressure synchrotron techniques. Yoshio began his career at Carnegie as a Research Scientist and was promoted to Beamline Scientist in July 2012. He is interested in studying elasticity and equation of state of materials at high pressures and high temperatures. He received a Ph.D. from Yokohama National University, Japan in 2006.

 

Zhenxian Liu
NSLS IR Program Director
E-mail: zxliu@bnl.gov
Phone: 631-334-5502

Zhenxian Liu is a beamline scientist at the U2A beamline, National Synchrotron Light Source, Brookhaven National Laboratory. He manages this high pressure infrared diamond anvil cell facility, which has been fully operational since 1999.

 

Yue Meng
Beamline Scientist
E-mail: ymeng@ciw.edu
Phone: 630-252-0483

Yue Meng is a beamline scientist. She researches the properties of materials at high pressure and temperature, using experimental techniques including x-ray spectroscopy, x-ray diffraction, optical spectroscopy, neutron diffraction, with applications to physics, chemistry, materials science, and geophysics. As one of the pioneers in developing high-pressure IXS, she has applied the technique to studies of electronic bonding changes in several low-Z materials at high pressure. At HPCAT, she is responsible for the development and operation of micro-focused x-ray diffraction with in-situ laser heating for structural properties at simultaneous ultra-high PT conditions.

 

Yufei Meng
Research Scientist
E-mail: yfmeng@ciw.edu
Phone: 202-478-4566

Yufei Meng works with the CVD diamond group at the Lab as a postdoctoral fellow. Her research focuses on the defects in different diamonds and their influence to properties and formation. Room R-147

 

Ivan Naumov
Research Scientist
E-mail: inaumov@ciw.edu
Phone: 202-478-8942

Ivan Naumov’s research interests are in theoretical modeling and understanding of real materials with considerable fundamental and/or technological relevance. Using first-principles density functional methods, ab-initio derived Hamiltonian approach coupled with Monte-Carlo simulations, and other techniques, he explores a broad array of structural, electronic, vibrational, and transport properties of materials such as ferroelectrics, superconductors, shape-memory alloys and graphene-based nanostructures. R-106

 

Changyong Park
Beamline Scientist
E-mail: cpark@ciw.edu

Changyong Park is a Beamline Scientist at HPCAT. He is responsible for developing and integrating novel high-pressure synchrotron techniques, supporting HPCAT operations and conducting original research. His research interests include amorphous and liquid structure of refractory materials under high pressure, structure and property correlations, and physics and chemistry of mineral-fluid interfaces.

 

Dmitry Popov
Beamline Scientist
E-mail: dpopov@ciw.edu
Phone: 630-252-7106

Dmitry Popov is a Beamline Scientist at HPCAT. His duties include user support and development of experimental techniques for high-pressure studies. His original research is focused on development of X-ray diffraction method to collect high resolution data on selected single-crystals under extreme pressure/temperature conditions.

 

Craig Schiffries
Deep Carbon Observatory Director
E-mail: cschiffries@ciw.edu
Phone: 202-478-8819

Schiffries received his Ph.D. in geology from Harvard and is currently the Director of the Deep Carbon Observatory at the Geophysical Laboratory of the Carnegie Institution in Washington. He completed his undergraduate work at Yale where he graduated summa cum laude with a double major in geology and geophysics, and economics and political science. He also earned a master's degree in geology and geophysics at Yale, and then an honors B.A. in philosophy, politics, and economics at Oxford University. He has received numerous fellowships and awards, including: Hertz Foundation Graduate Fellowship, Marshall Scholarship to Oxford University, Yale's Belknap Prize, Burton P. Twichell Memorial Scholarship at Yale, and Bank of America Scholarship for Science and Mathematics. Schiffries has also done fieldwork in North America, India, South Africa, and the USSR. Craig will help lead the continued development of the Deep Carbon Observatory (DCO) and the establishment of a broad international coalition of scientists and organizations devoted to the study of carbon in the Earth. He served as Director for Geoscience Policy at the Geological Society of America, where he provided advice to Congress and policy makers on a broad range of geoscience issues. He and his office have provided advice to Congress and policy makers on many geoscience issues. He is a former Carnegie Fellow (1988-1990) at the Geophysical Laboratory, so his new position represents a return to Carnegie. His scientific research focused on water-rock interactions and economic geology.

 

Guoyin Shen
HPCAT Director
E-mail: gshen@ciw.edu
Phone: 630-252-0429

Guoyin Shen's research covers a broad range of subjects aimed at understanding the behavior of materials under high-pressure and extreme temperature conditions. The research activities include investigation of phase transformations and melting lines in molecular solids, oxides and metals; characterization of liquids and amorphous materials under high-pressure/temperature conditions; measurement of crystal chemistry, elastic and transportation properties of deep Earth materials at pressure-temperature conditions equivalent to the Earth’s interior. His current research includes the study of structure and density of silicate liquids at high pressure and melting temperature determinations of silicates and iron alloys at Megbar pressures.

 

Jinfu Shu
Research Scientist
E-mail: jshu@ciw.edu
Phone: 202-478-8963

Jinfu Shu's research interests are in high pressure synchrotron x-ray single crystal studies, diamond inclusions, and micromineral studies. Jinfu earned his Ph.D. at Wuhan College of Geology in China in 1987.

 

Stanislav Sinogeikin
Associate Director of HPCAT
E-mail: ssinogeikin@ciw.edu
Phone: 630-252-4038

Stanislav (Stas) Sinogeikin is a beamline scientist at HPCAT. His research interests include Mineralogy of the Upper Mantle and Transition Zone of the Earth, physical (esp. elastic) properties of mantle minerals at high-pressures and high-temperatures by Brillouin spectroscopy and Synchrotron radiation, applications of high-pressure mineral physics to the dynamics of the Earth’s interiors, and development of X-Ray microdiffraction and spectroscopic (Brillouin and Raman) techniques at high pressure and temperature.

 

Maddury Somayazulu
Research Scientist
E-mail: msomayazulu@ciw.edu
Phone: 202-478-8911

Maddury Somayazulu is the CDAC laboratory manager and research scientist at the Geophysical Laboratory. He manages the diamond anvil cell laboratory and the gas-loading laboratory in addition to pursuing his research on high pressure-high temperature materials physics and chemistry.

 

Vincenzo Stagno
Research Scientist
E-mail: vstagno@ciw.edu
Phone: 202-478-8479

Vincenzo Stagno obtained his PhD degree at the Bayerisches Geoinstitut (Bayreuth, Germany) in the field of experimental petrology and geochemistry. As part of the EFree program, he is mainly interested in high-pressure synthesis of mesoporous materials, behavior of materials at extreme conditions and development of new assemblies for large volume experiments. He collaborates with Ho-Kwang Mao, Yingwei Fei and a team of scientists at Lehigh University (Pennsylvania). Further, his research also focuses on understanding the speciation of carbon in eclogite and peridotite assemblages as function of the oxygen fugacity and evolution of redox conditions in the mantle by combining multi anvil experiments with data from natural rocks.

 

Lin Wang
HPSynC Research Scientist
E-mail: lwang@ciw.edu

Lin Wang is a research scientist at HPSync and a senior investigator work for EFree. His principal research interests are the properties of nano materials under high pressure; Synthesis of nano materials, Properties of low dimensional materials and High Tc superconductor, Nano focused Synchrotron x-ray, and diamond anvil cell techniques for ultra-high pressure.

 

Yuming Xiao
Beamline Scientist
E-mail: yxiao@ciw.edu
Phone: 630-252-4058

Yuming Xiao is a beamline scientist at HPCAT of Geophysical Laboratory. He received his Ph.D. from Department of Applied Science at University of California, Davis. His thesis was focused on studying metal clusters in metalloproteins (nitrogenase and hydrogenase) with synchrotron spectroscopes (EXAFS, NFS, NRVS, XES). At HPCAT, Yuming is interested in studying properties of molecular solids and high temperature superconductors under high pressure using synchrotron spectroscopes.

 

Wenge Yang
Research Scientist
E-mail: wyang@ciw.edu
Phone: 630-252-0487

Wenge Yang received his Ph.D in Condensed Matter Physics in 1995. The focus of his research effort is to develop novel synchrotron radiation techniques (x-ray diffraction, imaging and spectroscopy) for high pressure research.

 

Qiaoshi Zeng
Research Scientist
E-mail: qzeng@ciw.edu

 

Changsheng Zha
Research Scientist
E-mail: czha@ciw.edu
Phone: 202-478-8948

Chang-Sheng Zha was a staff scientist in charge the high pressure program at Cornell High Energy Synchrotron Source (CHESS) before moving to this Laboratory. He uses a variety of experimental techniques in the study of high P-T physics, chemistry, geoscience and material science.