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Abreu, N. P.

Paper Title Page
MOPAN004 Commissioning of the LNLS Elliptically Polarizing Undulator 149
  • P. F. Tavares, N. P. Abreu, J. F. Citadini, R. H.A. Farias, M. J. Ferreira, J. G.R. S. Franco, L. C. Jahnel, L. Liu, A. F.A. G. Moreira, X. R. Resende, G. Tosin
    LNLS, Campinas
  We present the results of the commissioning of the first Elliptically Polarizing Undulator to be installed at the 1.37 GeV electron storage ring of the Brazilian Synchrotron Light Source. The undulator is designed to provide UV and soft X-ray photons from 100 eV up to 1 keV with full polarization control. It uses the APPLE II design with 50 mm period and 22 mm gap and allows for both parallel and anti-parallel longitudinal motion of its magnet cassettes. We present the commissioning results including the measured orbit and tune perturbations as well as the non-linear effects of the undulator fields on the stored beam and the corresponding impact on the beam lifetime.  
TUPAS095 Experiments with a DC Wire in RHIC 1859
  • W. Fischer, N. P. Abreu, R. Calaga, G. Robert-Demolaize
    BNL, Upton, Long Island, New York
  • U. Dorda, J.-P. Koutchouk, F. Zimmermann
    CERN, Geneva
  • A. C. Kabel
    SLAC, Menlo Park, California
  • H. J. Kim, T. Sen
    Fermilab, Batavia, Illinois
  • J. Qiang
    LBNL, Berkeley, California
  Funding: Work supported by U. S. DOE under contract No DE-AC02-98CH1-886.

A DC wire has been installed in RHIC to explore the long-range beam-beam effect, and test its compensation. We report on experiments that measure the effect of the wire's electro-magnetic field on the beam's lifetime and tune distribution, and accompanying simulations.