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Cousineau, S.M.

 
Paper Title Page
MOPCH127 SNS Warm Linac Commissioning Results 342
 
  • A.V. Aleksandrov, S. Assadi, W. Blokland, P. Chu, S.M. Cousineau, V.V. Danilov, C. Deibele, J. Galambos, S. Henderson, D.-O. Jeon, M.A. Plum, A.P. Shishlo
    ORNL, Oak Ridge, Tennessee
 
  The Spallation Neutron Source accelerator systems will deliver a 1.0 GeV, 1.4 MW proton beam to a liquid mercury target for neutron scattering research. The accelerator complex consists of an H- injector, capable of producing one-ms-long pulses at 60Hz repetition rate with 38 mA peak current, a 1 GeV linear accelerator, an accumulator ring and associated transport lines. The 2.5MeV beam from the Front End is accelerated to 86 MeV in the Drift Tube Linac, then to 185 MeV in a Coupled-Cavity Linac and finally to 1 GeV in the Superconducting Linac. The staged beam commissioning of the accelerator complex is proceeding as component installation progresses. Current results of the beam commissioning program of the warm linac will be presented including transverse emittance evolution along the linac, longitudinal bunch profile measurements at the beginning and end of the linac, and beam loss study.  
MOPCH130 Simulations for SNS Ring Commissioning 348
 
  • J.A. Holmes, S.M. Cousineau, S. Henderson, M.A. Plum
    ORNL, Oak Ridge, Tennessee
 
  In preparation for SNS ring commissioning, a number of operational issues have been studied using ORBIT Code simulations. These include beam injection without the use of time-dependent painting, beam accumulation and transport to the extraction dump and to the target, optimal painting schemes for various beam intensities, detailed tracking through the extraction septum with fully correct geometry, quadrupole current constraints in the ring-to-target transfer line (RTBT), and detailed modeling of H minus carbon foil stripping at injection. All these studies incorporated detailed physics including beam-foil interactions, symplectic single particle tracking, space charge and impedances, and losses due to apertures and collimation.  
MOPCH131 SNS Ring Commissioning Results 351
 
  • M.A. Plum, A.V. Aleksandrov, S. Assadi, W. Blokland, I.E. Campisi, P. Chu, S.M. Cousineau, V.V. Danilov, C. Deibele, G.W. Dodson, J. Galambos, M. Giannella, S. Henderson, J.A. Holmes, D.-O. Jeon, S.-H. Kim, C.D. Long, T.A. Pelaia, T.J. Shea, A.P. Shishlo, Y. Zhang
    ORNL, Oak Ridge, Tennessee
 
  The Spallation Neutron Source (SNS) comprises a 1.5-MW, 60-Hz, 1-GeV linac, an accumulator ring, associated beam lines, and a spallation neutron target. Construction began in 1999 and the project is on track to be completed in June 2006. By September 2005 the facility was commissioned up through the end of the superconducting linac, and in January 2006 commissioning began on the High Energy Beam Transport beam line, the accumulator ring, and the Ring to Target Beam Transport beam line up to the Extraction Beam Dump. In this paper we will discuss early results from ring commissioning including a comparison of achieved vs. design beam machine parameters and the maximum beam intensity achieved to date.  
WEPCH141 Accelerator Physics Code Web Repository 2254
 
  • F. Zimmermann, R. Basset, E. Benedetto, U. Dorda, M. Giovannozzi, Y. Papaphilippou, T. Pieloni, F. Ruggiero, G. Rumolo, F. Schmidt, E. Todesco
    CERN, Geneva
  • D.T. Abell
    Tech-X, Boulder, Colorado
  • R. Bartolini
    Diamond, Oxfordshire
  • O. Boine-Frankenheim, G. Franchetti, I. Hofmann
    GSI, Darmstadt
  • Y. Cai, M.T.F. Pivi
    SLAC, Menlo Park, California
  • Y.H. Chin, K. Ohmi, K. Oide
    KEK, Ibaraki
  • S.M. Cousineau, V.V. Danilov, J.A. Holmes, A.P. Shishlo
    ORNL, Oak Ridge, Tennessee
  • L. Farvacque
    ESRF, Grenoble
  • A. Friedman
    LLNL, Livermore, California
  • M.A. Furman, D.P. Grote, J. Qiang, G.L. Sabbi, P.A. Seidl, J.-L. Vay
    LBNL, Berkeley, California
  • D. Kaltchev
    TRIUMF, Vancouver
  • T.C. Katsouleas
    USC, Los Angeles, California
  • E.-S. Kim
    PAL, Pohang, Kyungbuk
  • S. Machida
    CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon
  • J. Payet
    CEA, Gif-sur-Yvette
  • T. Sen
    Fermilab, Batavia, Illinois
  • J. Wei
    BNL, Upton, Long Island, New York
  • B. Zotter
    Honorary CERN Staff Member, Grand-Saconnex
 
  In the framework of the CARE HHH European Network, we have developed a web-based dynamic accelerator-physics code repository. We describe the design, structure and contents of this web repository, illustrate its usage, and discuss our future plans.  
THOAFI01 The Development of Computational Tools for Halo Analysis and Study of Halo Growth in the Spallation Neutron Source Linear Accelerator 2768
 
  • D.A. Bartkoski, A.V. Aleksandrov, S.M. Cousineau, S. Henderson, J.A. Holmes
    ORNL, Oak Ridge, Tennessee
 
  Computational tools have been developed to quantify the halo in a beam by analyzing beam profiles and identifying the halo particles using the Gaussian area ratio and kurtosis methods. Simulations of various injection quadrupole magnet configurations using three types of initial simulated distributions, along with an analysis of their phase space and rms properties, provides insight into the development of halo in the Spallation Neurton Source linear accelerator. Finally, comparisons with machine beam profile data, taken at the same conditions as that of the simulated data, show how accurately the simulations model the beam and its halo development and provide a better understanding of the best machine configuration with which to minimize beam halo and losses.  
slides icon Transparencies
THPCH025 Electron Cloud Self-consistent Simulations for the SNS Ring 2832
 
  • A.P. Shishlo, S.M. Cousineau, V.V. Danilov, S. Henderson, J.A. Holmes, M.A. Plum
    ORNL, Oak Ridge, Tennessee
 
  The electron cloud dynamics is simulated for the Spallation Neutron Source ring using the self-consistent electron-cloud model for long-bunched proton beams implemented in the ORBIT code. These simulations feature simultaneous calculations of the dynamics of the proton bunch and of the electron cloud, including electron multipacting using a realistic secondary emission surface model. The frequency spectra and growth rates of the proton bunch transverse instability are studied as functions of the RF cavity voltage. The effectiveness of an electron-cloud instability suppression system is also studied using an ORBIT model of the real feedback system. SNS is a collaboration of six US National Laboratories: Argonne National Laboratory (ANL), Brookhaven National Laboratory (BNL), Thomas Jefferson National Accelerator Facility (TJNAF), Los Alamos National Laboratory (LANL), Lawrence Berkeley National Laboratory (LBNL), and Oak Ridge National Laboratory (ORNL).