IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Surface Science Monday Sessions
       Session SS1-MoA

Paper SS1-MoA5
An End Station for Synchroton-Based Photoelectron Spectroscopy of Actinide and Other Highly Reactive Samples

Monday, October 29, 2001, 3:20 pm, Room 120

Session: Innovations in Surface Science
Presenter: J.G. Tobin, Lawrence Livermore National Laboratory
Authors: D.A. Arena, Lawrence Livermore National Laboratory
J.G. Tobin, Lawrence Livermore National Laboratory
D. Shuh, Lawrence Berkeley National Laboratory
R.K. Schulze, Los Alamos National Laboratory
P. Boyd, Boyd Technologies, Inc.
Correspondent: Click to Email
We have constructed a specialized UHV experimental chamber to allow for the convenient study of the electronic structure of actinide and other highly reactive samples using synchrotron radiation at the Advanced Light Source (ALS). This chamber, the Actinide Spectroscopy End Station (ASES), is currently equipped to perform high-resolution photoemission spectroscopy in both spin integrated and spin resolved modes. The system includes a novel sample introduction system where samples are brought on-site in small ion-pumped vacuum suitcases and introduced into the experimental chamber without exposure to the atmosphere. We have included a separate sample preparation chamber to provide for sample cleaning and gas dosing followed by a quick transport to the analysis position. The ASES is equipped with numerous isolation valves to allow for the removal and repair of individual components while maintaining the vacuum integrity of the overall system. The sample manipulator allows for both heating and liquid nitrogen cooling of the samples and the end station also contains a number of redundant systems such as multiple sample heating and temperature measurement stages so that experiments can continue in the event of common occurrences such as a broken heating filament or open thermocouple connection. Expansion plans include the addition of a fluorescence spectrometer and a thin film deposition system. An extensive series of experiments are planned, including resonant photoemission, spin-resolved double polarization investigations, and oxidation studies of elemental plutonium and other actinide samples. This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under Contract No. W-7405-Eng-48.