1. STATUS OF THE CHARATERIZATION PROGRAM AT ANL Alexander Zinovev LAPD Collaboration Meeting, October 15-16, 2009

2. 2 SCOPE OF CHARACTERIZATION Secondary Electron Emission Yield (SY) vs. Electron Energy Photoemission Yield (PY) vs. Photon Density end Photon Energy Parameters of Interest Material Characterization  Chemical Composition  Chemical States of Atoms on the Surface  Electron Structure Methods  X-ray Photoelectron Spectroscopy (XPS)  Ultraviolet Photoelectron Spectroscopy (UPS)

3. SEE measurements 3 Power Supply target collector + +

4. 4 SIMION Simulations of Electron Trajectories in LEED System

5. 5 3-D View of field distribution in LEED electrodes system

6. Photoelectron Yield Measurements 6 Power Supply target collector + - Light Monochromator Light source Telescope

7. 7 Schematic Design of the Instrument Ion gun X-ray gun Electron gun Gate valve Load-lock chamber Spherical collector Entrance of energy analyzer Energy analyzer