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WEPCH — Poster Session 28-Jun-06 16:00 - 18:00 Implementation of TPSA in the Mathematica Code LieMath The Lie Algebra package LieMath written in the Mathematica language constructs the D. Kaltchev (TRIUMF) beamline map in a single-exponent Lie generator form. The algorithm (BCH-based map concatenation) has been recently enhanced with Truncated Power Series Algebra (TPSA) techniques.The polynomials produced by the series expansion of the Hamiltonian are replaced with arrays of coefficients (derivative structures) and the Poisson bracket and BCH are defined as operations on such structures. We have confirmed the statement that using automatic differentiation instead of symbolic operations increases the speed by least an order of magnitude. The code is equipped with a MAD parser and a normal form block allowing it to extract nonlinear chromaticity and amplitude detuning. The notebook was applied in FFAG studies and may be useful for the linear collider final focus or collimation systems. 6-D Transmission in Muon and Electron Linear FFAGs Extensive simulations of 6-D transmission simulations in linear, non-scaling FFAGs, F. Meot (CEA) F. Lemuet (<strong>CERN</strong>) based on gutter rapid acceleration, are reported. They concern two different on-going projects: the 20∼GeV muon accelerators in the Neutrino Factory (NuFact) with ISS parameters* and a 20∼MeV electron model of these machines, EMMA**. *http://www.hep.ph.ic.ac.uk/iss/**http://hepunx.rl.ac.uk/uknf/wp1/emodel/ Optimization of Beam Injection Using Higher Order Modes Signal into the First Accelerating Module at the TTF Linac Tesla Test Facility (TTF) is a user facility at DESY, equipped with RF modules. A misalignment of the first module with respect the gun has been already observed using di- R. Paparella, O. Napoly (CEA) N. Baboi (DESY) J.C. Frisch, L. Hendrickson, J. May, D.J. McCormick, M.C. Ross, T.J. Smith (SLAC) pole modes, and the efficiency of this method has been already proved. Each cavity in TTF has two higher order modes (HOM), and they can provide useful diagnostic signals. Since they are easy to identify, and their amplitude depends linearly on the beam offset from the cavity axis, they are excellent beam position monitors, and useful to minimize the wakefield, related to the emittance growth. A time-domain based recorder system, built at SLAC and installed at TTF, has been tested and used in the experimental study of single bunch generated HOM signals. This talk presents the experimental results of the optimization of the beam injection into the first module, by capturing information from each mode. Performances of the SOLEIL Operating Point in the Presence of Real Magnet Characteristics The SOLEIL storage ring operating point, presented at EPAC04 (WEPLT079), was optimized in terms of linear and non-linear beam dynamics, in order to reach a ± 6% transverse A. Nadji, P. Brunelle, A. Loulergue, A. Madur, L.S. Nadolski, M.-A. Tordeux (SOLEIL) 291 WEPCH067 WEPCH068 WEPCH069 WEPCH070
WEPCH072 WEPCH073 28-Jun-06 16:00 - 18:00 WEPCH — Poster Session energy acceptance needed to ensure a comfortable Touschek lifetime. At that time, harmonic field components included in the tracking were only calculated ones. Since September 2005, magnetic measurements of the storage ring electro-magnets are finished (the results are presented at this conference). All the measured expected harmonic field components are very close to the calculated ones. However, unexpected harmonic field components have been found in the quadrupole and sextupole magnets: a systematic octupolar field component in the long quadrupoles, and dipolar and decapolar field components (both systematic and random) in the sextupoles. These low order components have been introduced in the tracking in order to optimize a more realistic operating point that will satisfy the same good performances in terms of closed orbit correction, injection efficiency and beam lifetime. The High Order Non-linear Beam Dynamics in High Energy Storage Ring of FAIR The High Energy Storage Ring (HESR) is part A.N. Chechenin, R. Maier, Y. Senichev, E. Senicheva (FZJ) of the international project FAIR for antiproton physics with beam in the momentum range from 1.5 to 15 GeV/c to explore the research areas of hadron structure and quark-gluon dynamics. An important feature of the project is the combination of phase space cooled beams with thick internal targets. Therefore there are two obvious reasons of beam heating: the target-beam interaction and the intra-beam scattering. Another source of the beam size growth is the higher order resonances. In the paper we investigate the non-linear beam dynamics together with different correction schemes minimizing this effect and compare with other sources of beam heating. Since the tune working point has a spread dependent on the chromaticity correction scheme and space charge, we include in our consideration both effects as well. All beam dynamics calculations are carried out with the SIMBAD code from the Unified Accelerator Library (UAL). We use 10000 macro particles, grid sizes 64x64 and 1000 turns per run. Asymptotic Analysis of Ultra-relativistic Charge A new approach is developed for analysing D.A. Burton, J. Gratus, R. Tucker (Lancaster University) the dynamic behaviour of distributions of charged particles in an electromagnetic field. Noting the limitations inherent in the Lorentz-Dirac equation for a single point particle, a simple model is proposed for a charged continuum interacting self-consistently with the Maxwell field in vacuo. The model is developed using intrinsic tensor field theory and exploits to the full the symmetry and light-cone structure of Minkowski spacetime. This permits the construction of a regular stress-energy tensor whose vanishing divergence determines a system of non-linear partial differential equations for the velocity and self-fields of accelerated charge. Within this covariant framework a particular perturbation scheme is motivated by an exact class of solutions to this system describing the evolution of a charged fluid under the combined effects of both self and external electromagnetic fields. The scheme yields an asymptotic approximation in terms of inhomogeneous linear equations for the self-consistent Maxwell field, charge current and time-like velocity field of the charged fluid and is defined as an ultra-relativistic configuration. 292
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Contents MOXPA — Linear Colliders
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Contents MOPCH056 Development of Hi
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Contents MOPCH140 Compensation of L
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Contents MOPLS020 Rad-hard Luminosi
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Contents MOPLS102 Beam Dynamic Stud
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TUOCFI — Accelerator Technology C
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Contents TUPCH074 Fast and Precise
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Contents TUPCH159 High Power Wavegu
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Contents TUPLS039 Proposal of a Nor
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Contents TUPLS127 Permanent Deforma
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Contents WEPCH020 Extending the Lin
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Contents WEPCH108 FFAG Computation
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Contents WEPCH192 Compact Electron
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Contents WEPLS078 Design Study of t
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THOPA — Synchrotron Light Sources
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Contents THPCH042 Numerical Estimat
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Contents THPCH124 Visual Programmin
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Contents THPLS008 Commissioning of
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Contents THPLS099 Fast Kicker Syste
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MOXPA — Linear Colliders, Lepton
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MOYBPA — Circular Colliders 26-Ju
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Amro, A. THPLS043 An, D.H. TUPCH070
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Bates, D.A. WEPCH150 Battaglia, D.
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Bondarenko, A.V. MOPCH057, MOPCH073
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Campmany, J. THPLS053, THPLS134, TH
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Chung, C.C. TUPCH105 Chung, C.W. TU
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Della Mea, G. TUPLS016 Della Penna,
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Neuenschwander, R.T. WEPCH005, THPC
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Plate, D.W. THPLS114 Plesko, M. WEI
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Reiche, S. MOPCH028, WEPCH150 Reich
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Saewert, G.W. TUPLS069 Safranek, J.
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Simos, N. MOPCH138, TUPLS133, WEPCH
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Sun, Y. MOPLS089 Surrow, B. MOPLS05
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Yurkov, M.V. TUPCH081, THPLS133 Yus
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