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sextupole

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MOM1MP03 Resonance Driving Term Experiments: An Overview resonance, betatron, multipole, lattice 22
 
  • R. Bartolini
    Diamond, Oxfordshire
  The frequency analysis of the betatron motion is a valuable tool for the characterization of the linear and non-linear motion of a particle beam in a storage ring. In recent years, several experiments have shown that resonance driving terms can be successfully measured from the spectral decomposition of the turn-by-turn BPM data. The information on the driving terms can be used to correct unwanted resonances, to localize strong non-linear perturbations and provides a valuable tool for the construction of the non-linear model of the real accelerator. In this paper we introduce briefly the theory, the computational tools and we give a review of the resonance driving terms experiments performed on different circular machines.  
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WEPPP14 Advances in Matching with MAD-X. controls, dipole, insertion, quadrupole 213
 
  • R. de Maria, F. Schmidt, P. K. Skowronski
    CERN, Geneva
  A new matching algorithm and a new matching mode have been developped for MadX in order to increase its potentialities. The new algorithm (JACOBIAN) is able to solve a generalized matching problem with an arbitrary number of variables and constraints, aiming to solve the corresponding least square problem. The new mode (USE\MACRO) allows the user to construct his own macros and expressions for the definition of the constraints. The new algorithm and the new mode where succesfully used for finding optic transitions, tunability charts and non-linear chromaticity correction. They can be used as a general tool for solving inverse problems which can be defined in MadX using all the available modules (twiss, ptc,track, survey, aperture, etc).  
 
THM2IS02 The Universal Accelerator Parser lattice, linac, controls, quadrupole 303
 
  • D. Sagan
    Cornell University, Department of Physics, Ithaca, New York
  • D. A. Bates
    LBNL, Berkeley, California
  • A. Wolski
    Liverpool University, Science Faculty, Liverpool
  The Universal Accelerator Parser (UAP) is a library for reading and translating between lattice input formats. The UAP was primarily implemented to allow programs to parse Acelerator Markup Language (AML) formatted files [D. Sagan et al. ‘‘The Accelerator Markup Language and the Universal Accelerator Parser'', 2006 Europ. Part. Acc. Conf.]. Currently, the UAP also supports the MAD lattice format. The UAP provides an extensible framework for reading and translating between different lattice formats. Included are routines for expression evaluation and beam line expansion. The use of a common library among accelerator codes will greatly improve the interoperability between different lattice file formats, and ease the development and maintenance to support these formats in programs. The UAP is written in C++ and compiles on most Unix, Linux, and Windows platforms. A Java port is maintained for platform independence. Software developers can easily integrate the library into existing code by using the provided hooks.  
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