Paper  Title  Page 

TUOAAB02  Measurement and Simulation of SpaceCharge Dependent Tune Separation in FNAL Booster  772 


In recent years, a number of spacecharge 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 1.0·10^{12} to 3.5·10^{12} particles. A linear increase in the measured tune separation with beam intensity was observed. For comparison, beam coupling was also simulated with the spacecharge code Synergia. This code has successfully modeled the spacecharge 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 229248. 

Slides  
TUZBC02  SciDAC Frameworks and Solvers for Multiphysics Beam Dynamics Simulations  894 


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 largescale parallel computing have been developed to study collective beam effects such as space charge, electron cloud, beambeam, 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 singleparticle dynamics to support the collective effect at hand. We describe how we are developing a framework for realistic multiphysics simulations, i.e., simulations including the stateoftheart calculations of all relevant physical processes.  
Slides  
TUODC02  Development of 3D BeamBeam Simulation for the Tevatron  905 


We present status of development of a 3D BeamBeam simulation code. The essential features of the code are 3D particleincell Poisson solver, multibunch beam transport and interaction, chromaticity and machine impedance. The simulations match synchrobetatron oscillations measured at the VEPP2M collider. The impedance model is compared to analytic expressions for instability growth.  
Slides  
THPAS019  A Beam Dynamics Application Based on the Common Component Architecture  3552 


Funding: Department of Engergy, Office of Advanced Scientific Computing Research, SBIR grant: DEFG0206ER84520 A componentbased 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 Pythonsteered accelerator simulation from a set of services provided by two separate beam dynamics packages (Synergia and MaryLie/Impact) and two highperformance computer science packages (PETSc and FFTW). The development of the proofofconcept application was accomplished via the following tasks:
