Michigan Technological University
Department of Physics

is pleased to announce the

Graduate Students Series Spring 2004

Da Gao

Physics Graduate Student
Michigan Technological University
Advisor: Dr. John A. Jaszczak

Monte Carlo Simulations of
Surface Morphology Dynamics

Physics of the morphology evolution during the crystal growth have been studied for
a long time both theoretically and experimentally. However, some aspects are still
mysteries today especially the understanding from a nanoscale viewpoint. In this
short talk, special features of a natural graphite crystal will be presented. In
addition, possible mechanisms leading to such features will be explored via the
kinetic Monte Carlo simulations.

Qiang Yang

Physics Graduate Student
Michigan Technological University
Advisors: Dr. Christ Ftaclas & Dr. Robert Nemiroff

Optimization of Deformable Mirror for the
Hokupa'a-85 Adaptive Optics System

Modal analysis of an 85-actuator bimorph deformable mirror gets deeply discussed,
and it is based on the Hokupa'a-85 adaptive optics (AO) system for the Gemini 8m
telescope and the Gemimi Near Infrared Coronagraphic Imager. For improving
correction ability of this deformable mirror, a few approaches have been introduced
for optimizing its electrode pattern. Simulation results show that the optimized
85-actuator deformable mirror improves final performance of the AO system (Strehl at
H) about 10% better than those from the original 85-actuator deformable mirror which
was designed by former faculty of the University of Hawaii.

Thursday, January 29, 2004

4:00 p.m., Fisher 139

Refreshments will be served

MTU | Physics | Colloquium