Characterization Techniques

At Dartmouth, we use electron backscatter diffraction (EBSD) to measure the orientation of ice crystals with respect to a reference coordinate system, in this case the borehole at WAIS. EBSD is done using a scanning electron microscope (SEM) and requires more time than optical methods for measuring orientation, but produces more complete orientation information, with both c-axis and a-axis directions, which are necessary to distinguish between certain types of recrystallization.