Our group includes students and personnel based on campus, in Honolulu, as well as several scientists working at the Argonne National Laboratory. Our graduate students are enrolled in PhD program administered through the Department of Geology and Geophysics, where Przemek holds a graduate faculty position. We also employ UHM undergraduates for shorter-term projects, and host visits of students from other Universities.

We constantly look for new students, so if you find our research interesting, please contact Przemek by email ( to learn about employment opportunities.

Research Scientists

Dr. Dongzhou Zhang, PX^2 Beamline Scientist

Dongzhou Zhang received his B.S. in physics from Peking University, Beijing, China, in 2008. He completed his Ph.D. in geophysics under the supervision of Prof. Jennifer Jackson at California Institute of Technology, Pasadena, CA, in 2014. He is currently the beamline scientist of the Partnership for eXtreme Xtallography program affiliated with the University of Hawaii at Manoa and located at the GeoSoilEnviroCARS at Argonne National Laboratory. His research interests include physics and chemistry of the planetary interiors, high pressure physics and synchrotron based X-ray techniques. He received several awards, including the Chinese Government Award for Outstanding Self-Financed Students Abroad (2013) and the American Geophysical Union Mineral and Rock Physics Graduate Research Award (2015).

Graduate Students

Yi Hu, PhD Student

Yi’s theses research is focused on understanding metastable polymorphism in pyroxene minerals in the context of subduction zone modeling. Yi uses advanced crystallographic methods and synchrotron diffraction, as well as DFT calculations and phase equilibria modeling to study previously unknown discontinuous transformations in natural mantle pyroxenes and model synthetic end-members. Within this project we collaborate with several other CDAC-supported groups, including Princeton University, University of Arizona and Northwestern University.

Hannah Shelton, PhD Student

Hannah’s thesis research focuses on understanding the role and consequences of hydrogen bonds in controlling compressional behavior and phase transitions in solids. Hannah uses advanced crystallographic methods, including time-resolved synchrotron diffraction and pressure-ramp approach to study two classes of materials: (a) organic solids that have similar molecular structures, and packing patterns, but differ in hydrogen bond formation ability and (b) isostructural couples of inorganic solids that are fully hydrated (e.g. hydroxide) and fully anhydrous (e.g. oxide). Within this project we collaborate with several other CDAC-supported groups, including University of Arizona, Northwestern University and University of Alabama.

Jingui Xu, Visiting PhD Student

Jingui is a visiting student from Institute of Geochemistry, Chinese Academy of Sciences. His Ph.D. study focuses on phase transitions and equation of state of hydrous pyroxenes

Technical and Engineering Staff

Harold Garbeil, ATREX Software Development

Linda Martel, AREX Outreach Specialist

Mario Williamson, PX^2 Engineering Support

People who moved on

Dr. Jin S. Zhang, COMPRES Technology Officer

Jin was a Research Scientist and Technology Officer for COMPTECH, COMPRES Technology Center at Argonne from November 2014 until July 2016. Jin graduated with a PhD in Geophysics from University of Illinois at Urbana Champaign and her main specialty is Brillouin Spectroscopy. She is now an Assistant Professor in the Geology Department and Institute of Meteoritics at University of New Mexico.