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Amundson, J. F.

Paper Title Page
TUOAAB02 Measurement and Simulation of Space-Charge Dependent Tune Separation in FNAL Booster 772
 
  • D. O. McCarron
    IIT, Chicago, Illinois
  • J. F. Amundson, W. Pellico, P. Spentzouris, R. E. Tomlin
    Fermilab, Batavia, Illinois
  • L. K. Spentzouris
    Illinois Institute of Technology, Chicago, Illinois
  
  In recent years, a number of space-charge studies have been performed in the FNAL Booster. The Booster is the first circular accelerator in the Fermilab chain of accelerators, with an injection energy of 400 MeV. The combination of this relatively low injection energy and improving beam intensity for Booster's high intensity applications necessitates a study of space charge dynamics. Measurement and simulation of space charge coupling in the Booster will be presented. The coupling measurement was performed using a standard technique, albeit repeated for different injected beam intensities. The initial transverse tune separation was minimized (Qx=Qy=6.7), followed by a systematic skew quadrupole strength variation. Transverse beam oscillation frequencies were recorded while exciting the beam. These frequencies were recorded for a range of 1.0·1012 to 3.5·1012 particles. A linear increase in the measured tune separation with beam intensity was observed. For comparison, beam coupling was also simulated with the space-charge code Synergia. This code has successfully modeled the space-charge tune shift in the Booster*, and compares favorably to other space charge codes and analytic results.

* Synergia: A 3D Accelerator Modelling Tool with 3D Space Charge. Journal of Computational Physics, Volume 211, Issue 1 , 1 January 2006, Pages 229-248.

 
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TUZBC02 SciDAC Frameworks and Solvers for Multi-physics Beam Dynamics Simulations 894
 
  • J. F. Amundson, P. Spentzouris
    Fermilab, Batavia, Illinois
  • D. R. Dechow
    Tech-X, Boulder, Colorado
  • J. Qiang, R. D. Ryne
    LBNL, Berkeley, California
  
  The need for realistic accelerator simulations is greater than ever before due to the needs of design projects such as the ILC and optimization for existing machines. Sophisticated codes utilizing large-scale parallel computing have been developed to study collective beam effects such as space charge, electron cloud, beam-beam, etc. We will describe recent advances in the solvers for these effects and plans for enhancing them in the future. To date the codes have typically applied to a single collective effect and included just enough of the single-particle dynamics to support the collective effect at hand. We describe how we are developing a framework for realistic multi-physics simulations, i.e., simulations including the state-of-the-art calculations of all relevant physical processes.  
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TUODC02 Development of 3D Beam-Beam Simulation for the Tevatron 905
 
  • E. G. Stern, J. F. Amundson, P. Spentzouris, A. Valishev
    Fermilab, Batavia, Illinois
  • J. Qiang, R. D. Ryne
    LBNL, Berkeley, California
  
  We present status of development of a 3D Beam-Beam simulation code. The essential features of the code are 3D particle-in-cell Poisson solver, multi-bunch beam transport and interaction, chromaticity and machine impedance. The simulations match synchro-betatron oscillations measured at the VEPP-2M collider. The impedance model is compared to analytic expressions for instability growth.  
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THPAS019 A Beam Dynamics Application Based on the Common Component Architecture 3552
 
  • D. R. Dechow, D. T. Abell, P. Stoltz
    Tech-X, Boulder, Colorado
  • J. F. Amundson
    Fermilab, Batavia, Illinois
  • L. Curfman McInnes, B. Norris
    ANL, Argonne, Illinois
  
  Funding: Department of Engergy, Office of Advanced Scientific Computing Research, SBIR grant: DE-FG02-06ER84520

A component-based beam dynamics application for modeling collective effects in particle accelerators has been developed. The Common Component Architecture (CCA) software infrastructure was used to compose a new Python-steered accelerator simulation from a set of services provided by two separate beam dynamics packages (Synergia and MaryLie/Impact) and two high-performance computer science packages (PETSc and FFTW). The development of the proof-of-concept application was accomplished via the following tasks:

  1. addressing multilanguage interoperability in the MaryLie/Impact code with Babel;
  2. creating components by making the selected software objects adhere to the Common Component Architecture protocol;
  3. assemblying the components with a newly developed, Component Builder gui; and
  4. characterizing the performance of the space charge (Poisson) solver that was originally used in Synergia 1.0 versus the PETSc-based space charge solver that has been developed for Synergia2.
The resulting beam dynamics application will allow the Synergia2 framework to evolve simultaneously with the modeling and simulation requirements of the International Linear Collider.