Associate Staff Scientist
Ph.D., 1992, Physical and Mathematical Sciences
Moscow Institute of Physics and Technology, Russia
California Institute of Technology
1200 E. California Blvd., MS 252-21
So. Mudd Building, Rm 265D
Pasadena, CA 91125
The main research I am involved in is experimental determination of periclase (MqO) melting curve at the earth's core-mantle boundary pressure, about 130-140GPa. Refractory nature of periclase, with ~3100 K melting temperature at ambient pressure, requires use of dynamic-compression methods to accomplish this task. We employ conventional radiative shock temperature measurements on MgO single crystals preheated before compression to c.a. 2000 K. The measurements taken up to 250 GPa and 9200 K on MgO samples initially at ~1900 K, revealed no melting for `200 ns total duration of the process. A new set of experiments at significantly higher, ~2400 K initial temperature, is currently under way.