AVS 60th International Symposium and Exhibition
    Vacuum Technology Wednesday Sessions
       Session VT+AS+SS+TF-WeA

Paper VT+AS+SS+TF-WeA11
Quantum Efficiency and Divergence from Metal Photocathodes

Wednesday, October 30, 2013, 5:20 pm, Room 202 C

Session: Surface Science for Accelerator Applications
Presenter: H.A. Padmore, Lawrence Berkeley National Laboratory
Authors: T. Vecchione, SLAC National Accelerator Laboratory
D.H. Dowell, SLAC National Accelerator Laboratory
J. Feng, Lawrence Berkeley National Laboratory
W. Wan, Lawrence Berkeley National Laboratory
H.A. Padmore, Lawrence Berkeley National Laboratory
Correspondent: Click to Email
Quantum efficiency and divergence are key parameters for measuring photocathode performance. This work presents new theoretical expressions for each quantity and experimental confirmation of each expression with respect to excess energy. Novel instrumentation and analysis techniques developed are described in detail. The data obtained from polycrystalline metal thin films matches reasonably well to that which is theoretically predicted.