Computing transfer maps from magnetic field data

Author

Venturini, M. ; Dragt, A.

Author_Institution

Dept. of Phys., Maryland Univ., College Park, MD, USA

Volume

3

fYear

1999

fDate

1999

Firstpage

1593

Abstract

In many cases the most accurate information about fields in a magnet comes either from direct measurement (using for example spinning coils) or from a numerical computation done with a 3D electromagnetic code. In this paper we show how this information can be used to compute transfer maps with high accuracy. The resulting transfer maps take into account all effects of real beamline elements including fringe-field and multipole error effects. The method we employ automatically incorporates the smoothing properties of the Laplace Green function. Consequently, it is robust against both measurement and electromagnetic code errors. The method has been implemented in the code MARYLIE as a pair of user-defined routines

Keywords

Green´s function methods; particle beam dynamics; 3D electromagnetic code; Laplace Green function; MARYLIE; fringe-field; magnetic field data; multipole error effects; transfer maps; Coils; Electromagnetic fields; Electromagnetic measurements; Green function; Laplace equations; Magnetic field measurement; Magnetic fields; Physics; Spinning; Taylor series;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.794191

Filename

794191