Optimization of the 3 m TGM beamline, at CAMD, for constant initial state spectroscopy

Authors

Yaroslav B. Losovyj, Louisiana State University at Baton RougeFollow
Ihor Ketsman, University of Nebraska-LincolnFollow
Eizi Morikawa, Louisiana State University, Baton RougeFollow
Zhenjun Wang, University of Nebraska-Lincoln
Jinke Tang, University of New Orleans, New Orleans, LA
Peter A. Dowben, University of Nebraska-LincolnFollow

Date of this Version

11-11-2007

Comments

Published in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 582:1, (November 11, 2007), pp. 264-266; doi:10.1016/j.nima.2007.08.127 Proceedings of the 14th National Conference on Synchrotron Radiation Research - SRI 2007. Copyright © 2007 Elsevier B.V. Used by permission. http://www.sciencedirect.com/science/journal/01689002

Abstract

The 3 m toroidal grating monochromator (TGM) VUV beamline at CAMD/LSU was realigned to achieve better illumination of the monochromator gratings with the goal of substantially increasing the flux at the higher photon energies. This is partly accomplished through a tilting of the monochromator (by about of 13.5°), with respect to the plane defined by the synchrotron, providing a smaller grazing angle at the initial mirrors. The improved performance of the beamline permits resonant photoemission studies at Gd 4d core threshold without resorting to second order light, which we demonstrate for Gd doped HfO₂.