# Wuppertal 2015 – wissenschaftliches Programm

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# AKBP: Arbeitskreis Beschleunigerphysik

## AKBP 9: Beam Dynamics / Simulation I

### AKBP 9.7: Vortrag

### Dienstag, 10. März 2015, 18:15–18:30, BZ.08.04 (HS 2)

**Ion optical simulations of large-aperture separators including realistic magnet field models** — •Erika Kazantseva — TEMF, Schlossgartenstr.8, Technische Universität Darmstadt

The main goal of this work is to develop an effective approach to fast and accurate ion optical simulations of an ensemble of large-aperture magnets such as in-flight fragment separators like the FRS at GSI and the future Super-FRS at FAIR. For accurate simulations capable of predicting the behavior of real particles it is necessary to have an ion-optical model in which a detailed and realistic description of the magnetic fields is implemented.

There are different approaches to make the ion-optical model more realistic, for example, the use of analytical functions to describe the fringe fields, for example, Enge-functions. One should also consider representing the effect of the fringe fields via effective fringe field maps or fringe field integrals. Large aperture magnetic elements and short distances between them could make simple models invalid. Thus the influence of the neighboring magnet yokes has to be taken into account.

We will also investigate the generation of transfer maps of arbitrary order from the magnetic fields of given elements. In this case, it is possible to relate computationally the final coordinates to the initial ones by the numerical integration of the equations of motion.