This facility consists of a PHI Model 600 scanning Auger microprobe (SAM). Recently, the instrument was upgraded with a modern PC based computer, new controlling electronic modules, and new software that improves our capabilities to acquire, process, and transmit the data. In early 2003, we plan another software upgrade that will increase the number of acquisition points, from 40 to 1000, in the Multiplex mode. This mode allows acquisition of semi-quantitative elemental compositions at specific points on the sample surface. This will be especially useful for our study on GBs segregation, where a wide range of GBs have to be chemically analyzed on fracture surfaces.