Keyword: lattice
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MOSBC2 Linac Beam Dynamics Simulations with PyORBIT linac, simulation, space-charge, cavity 20
 
  • A.P. Shishlo
    ORNL, Oak Ridge, Tennessee, USA
 
  Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under Contract No. DE-AC05-00OR22725
Linac dynamics simulation capabilities of the PyORBIT code are discussed. The PyORBIT is an open source and a further development of the original ORBIT code that was developed and used for design, studies, and commissioning of the SNS ring. The PyORBIT code like the original one has a two layers structure. The C++ is used to perform time consuming computations, and a program flow is controlled from the Python language shell. The flexible structure allowed using the PyORBIT also for linac dynamics simulations. The benchmark of the PyORBIT with Parmila and the XAL Online model is presented.
 
slides icon Slides MOSBC2 [1.857 MB]  
 
MOSBC3 An Implementation of the Virtual Accelerator in the Tango Control System controls, simulation, diagnostics, storage-ring 23
 
  • P.P. Goryl, A.I. Wawrzyniak
    Solaris, Kraków, Poland
  • M. Sjöström
    MAX-lab, Lund, Sweden
  • T. Szymocha
    Cyfronet, Kraków, Poland
 
  Funding: Work supported by the European Regional Development Fund within the frame of the Innovative Economy Operational Program: POIG.02.01.00-12-213/09
Integration of simulating codes into the control system gives a possibility to improve machine operation. Providing tools for making computations directly within the control system and letting exchange data between the control system and models is a way of simplifying the whole process of calculating and applying machine's operational parameters as well as keeping track of them. In addition, having so-called an on-line model could be useful for system diagnostic and faults detection, especially when the objective approach is considered. The concept of the Virtual Accelerator will be presented as well as its implementation for the Tango control system as it is planned to be used for both facilities: the Solaris in Kraków, Poland and the MAX IV in Lund, Sweden. This includes the ModelServer tango device, the simplified C/C++ Tango API to be used with codes like Tracy and the tango2elegant script providing easy solution for integrating the Elegant tool with the Tango.
 
slides icon Slides MOSBC3 [2.232 MB]  
 
MOSCC1 Beam Dynamics Study concerning SIS-100 Proton Operation including Space Charge Effects space-charge, dynamic-aperture, proton, ion 34
 
  • S. Sorge
    GSI, Darmstadt, Germany
 
  The projected SIS-100 synchrotron at GSI will be used for operation with intense proton and heavy ion beams. In order to avoid the crossing of the transition energy during proton operation a complicated optics scheme is proposed to provide a transition energy above the extraction energy of E=29 GeV. For the purpose of optimizing the lattice, and to find a suitable working point, regime simulation scans of the dynamic aperture are performed based on MAD-X tracking. In the next step working point candidates will be used for particle tracking simulations in order to estimate beam loss due to space charge induced resonance crossing. For these studies different codes and space charge models are considered.  
slides icon Slides MOSCC1 [0.643 MB]  
 
TUABC2 Global Optimization of the ANKA Lattice Using Multiobjective Genetic Algorithms (MOGA) emittance, optics, quadrupole, storage-ring 72
 
  • M. Streichert, N. Hiller, E. Huttel, V. Judin, B. Kehrer, M. Klein, S. Marsching, C.A.J. Meuter, A.-S. Müller, M.J. Nasse, M. Schuh, N.J. Smale
    KIT, Karlsruhe, Germany
 
  Funding: This work has been supported by the Initiative and Networking Fund of the Helmholtz Association under contract number VH-NG-320.
The optimization of a storage ring lattice is a multiobjective problem, since the parameter space of possible solutions can be very large and a high number of constraints have to be taken into account during the optimization process. In this paper we used Genetic Algorithms (GA) and MultiObjective Genetic Algorithms (MOGA), which can solve such problems very efficiently and rapidly, to find the optimized settings for the ANKA storage ring lattice.
 
 
TUACC3 A Fast Integrated Green Function Method for Computing 1D CSR Wakefields Including Upstream Transients wakefield, radiation, dipole, synchrotron 89
 
  • C.E. Mitchell, J. Qiang, R.D. Ryne
    LBNL, Berkeley, California, USA
 
  Funding: This work is supported under DOE Contract No. DE-AC02-05CH11231.
An efficient numerical method for computing wakefields due to coherent synchrotron radiation (CSR) has been implemented using a one-dimensional integrated Green function approach. The contribution from CSR that is generated upstream and propagates across one or more lattice elements before interacting with the bunch is included. This method does not require computing the derivative of the longitudinal charge density, and accurately includes the short-range behavior of the CSR interaction. As an application of this method, we examine the importance of upstream transient wakefields within several bending elements of a proposed Next Generation Light Source.
 
slides icon Slides TUACC3 [2.060 MB]  
 
TUADI1 Storage Ring EDM Simulation: Methods and Results simulation, storage-ring, factory, proton 99
 
  • Y. Senichev, A. Lehrach, R. Maier, D. Zyuzin
    FZJ, Jülich, Germany
  • S.N. Andrianov, A.N. Ivanov
    St. Petersburg State University, St. Petersburg, Russia
  • M. Berz, K. Makino
    MSU, East Lansing, Michigan, USA
 
  The idea of Electric Dipole Moment search using the electrostatic storage ring with polarized beam is based on accumulation of additional tiny spin rotation, about one-billionth of radians per second, occurred only in the presence of EDM. This method can be realized under condition of the long-time spin coherency ~1000 seconds. During this time each particle performs about 109 turns in ring moving on different trajectories. At such conditions the spin-rotation aberrations associated with various types of space and time dependent nonlinearities start playing a crucial role. To design such a ring the computer simulation is necessary taking into account all factors affecting the spin. We used COSY-Infinity and integrating program with symplectic Runge-Kutta methods in composition with analytic methods. We developed a new lattice based on the alternating spin rotating. As a result, we can achieve the SCT of ~5000 seconds. The difficulties of these studies are still in the fact that the aberrations growth is observed in the scale of 109 turns and few million particles. For this simulation we use a supercomputer with parallel computing process.  
slides icon Slides TUADI1 [0.951 MB]  
 
WEAAC2 Simulation of Baseband BTFs Using a Particle-in-cell Code simulation, beam-beam-effects, proton, diagnostics 121
 
  • P.A. Görgen
    TEMF, TU Darmstadt, Darmstadt, Germany
  • O. Boine-Frankenheim
    GSI, Darmstadt, Germany
  • W. Fischer, S.M. White
    BNL, Upton, Long Island, New York, USA
 
  A simulation model for transverse bunched beam transfer functions (BTFs) at the base harmonic is presented. It is based on a code including different machine effects, most notably transverse space charge using a two-dimensional (2D) Poisson solver. A simplified model for the simulation of the strong-strong beam-beam effect was implemented using either 2D field data or analytic expressions under the assumption of Gaussian beams for the beam-beam interaction. The validity of the BTF model is verified based on the comparison of BTF and Schottky spectra features with analytic expectations from literature. The simulation model is then applied to the RHIC proton lattice. A linear transfer map is used between interaction points. BTFs including the beam-beam effect are simulated. Measurements are compared to simulation results at machine conditions.  
slides icon Slides WEAAC2 [2.829 MB]  
 
WEP06 Particle Tracking in Electrostatic Fields with Energy Conservation simulation, controls, quadrupole, storage-ring 149
 
  • A.N. Ivanov
    St. Petersburg State University, St. Petersburg, Russia
 
  The key idea of the research is to consider spin dynamics in electrostatic fields. Due to the fact, that spin rotation frequency explicitly depends on velocity of the particle and its kinetic energy is changed in electrostatic fields it is important to use some technique that provides both conservation energy and symplicticity condition. An appropriate mathematical model is described and the results of numerical calculation are shown. In conclusion, fringe fields influence is examined and compared with case of ideal fields.  
 
WEACI1 Design and Applications of the Bmad Library for the Simulation of Particle Beams and X-Rays simulation, solenoid, controls, quadrupole 179
 
  • D. Sagan
    CLASSE, Ithaca, New York, USA
 
  The Bmad software library has been developed for simulations of high-energy particle beams along with simulations of the x-rays produced by the particle beams. Owing to its modular, object-oriented design, Bmad is now used in a number of programs at Cornell's Laboratory for Elementary-Particle Physics. This paper will discuss the design of the Bmad library. Features such as the ability to have overlapping elements, the ability to define in a lattice file the action of control-room ‘‘knobs'', and the ability to choose from a number of different tracking options on an element-by-element basis have all contributed to a versatile simulation environment that eases the task of programmers and users using Bmad. Also discussed is the uses that Bmad has been put to including synchrotron radiation tracking with reflections from the vacuum chamber walls, spin tracking, beam break-up instability, intra-beam scattering, etc. Besides simulation and design programs, Bmad can be used in control programs to do such things as orbit and Twiss correction calculations.  
slides icon Slides WEACI1 [1.884 MB]  
 
WEACC3 Matrix Formalism for Long-term Evolution of Charged Particle and Spin Dynamics in Electrostatic Fields simulation, storage-ring, quadrupole, dipole 187
 
  • A.N. Ivanov, S.N. Andrianov
    St. Petersburg State University, St. Petersburg, Russia
 
  The matrix formalism as a numerical approach for solving of ODE equations is considered. It is a map method and has several advantages over classical step-by-step integration methods. This approach allows to present the solution as set of numerical matrices. A complete derivation of the equations this method is based on will be shown. Problems of symplectification and computing performance are discussed. We have developed an application that provides a tool for differential equations solving. The developed program allows to generate the final programming codes on C++, Fortran, MATLAB, C#, Java languages. The given approach is applied to long-term evolution of charged particle and spin dynamics in electrostatic fields.  
slides icon Slides WEACC3 [1.441 MB]  
 
THAAI3 MAD-X Progress and Future Plans multipole, optics, quadrupole, simulation 211
 
  • L. Deniau
    CERN, Geneva, Switzerland
 
  The design efforts for the High Luminosity upgrade of the Large Hadron Collider (HL-LHC) will require significant extensions of the MAD-X code widely used for designing and simulating particle accelerators. These changes are framed into a global redesign of the MAD-X architecture meant to consolidate its structure, increase its robustness and flexibility, and improve its performance. Some examples of recent extensions to MADX like the RF-multipole element will be presented. Improvement for models and algorithms selection providing better consistency of the results and a wider range of use will be discussed. The computation efficiency will also be addressed to better profit of recent technologies. In this paper, we will describe the last improvements and the future plans of the project.  
slides icon Slides THAAI3 [6.830 MB]