SYNCHROTRON-RADIATION-INDUCED H2O DESORPTION FROM ALUMINUM SURFACES

Photon stimulated desorption from aluminum surfaces was studied by irr adiating an aluminum chamber in the 1.3 GeV electron storage ring at t he Synchrotron Radiation Research Center. Experiments on aluminum samp les were also performed in an experimental station. The behavior of wa ter vapor, the main concern in this work, was quite different from tha t of the other gases. A time delay between the peak of the H2O signal and the starting time of irradiation was observed. Effects due to diff erent conditions such as beam current, pumping speed, and beam dose of the storage ring were investigated. (C) 1997 American Vacuum Society.