Abstract
An ellipsoidal mirror analyzer (EMA) has been constructed at the National Bureau of Standards for the analysis of ions produced by photon stimulated desorption. This type of analyzer can measure simultaneously differential kinetic energy, angular distribution, and mass. The design of the EMA is similar to one developed previously [D.E. Eastman, J.J. Donelon, N.C. Hien and F.J. Himpsel, Nucl. Instr. and Meth. 172 (1980) 327]. However, an entirely new approach has been used in the mechanical design, construction materials, and in the technique for charged particle position detection. The primary differences are an aberration corrected mirror, the use of titanium for the main structural components, and a resistive-anode area detector. A description of these differences and their advantages is given in detail.
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