Sextupole magnet

Fig. 6. Cross section of a sextupole magnet with magnetic field lines (red). The direction of the atoms is perpendicular to the cross section...

Fig. 7 shows a realistic layout of a Penning trap in a split solenoid magnet, where a sextupole magnet is placed under 90 degrees to the solenoid magnetic field axis. The splitting of the solenoid as well as a split electrode or one made out of a mesh are necessary to let the H atoms pass without destroying them. 

Fig. 8. Trajectories of antihydrogen atoms through two sextupole magnets as calculated by a Monte-Carlo method. Please not the the X and Z axis do not have he same scale...

Fig. 4. Schematic design of the ESRF showing the synchrotron, the storage ring and the injector. The magnetic lattice has a 32 fold symmetry. Part of the lattice is shown in more detail below (without quadrapole and sextupole magnets). Photons can be observed along the axis of the undulator but also within an angle of 5.6° from the bending magnets.

A subsequent sextupole magnet (the magnetic arrangement is given in Fig. 2.9) acts as a polarizer by preferentially transmitting the atoms with a magnetic... 

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