At the Munich 15 MV tandem accelerator a new two stage microprobe system Supraleitendes Nanoskop für Angewandte Kernphysikalische Experimente (SNAKE) is currently under construction. In contrast to existing facilities, it is projected to focus up to 30 MeV protons as well as heavy ions with maximum energies of 200 MeV q2/A to a submicron beam spot. In order to achieve this goal, a superconducting lens with inherent multipole corrections and special shaped edges with respect to fringe field calculations was designed. The introduction of superconductivity enables a pole tip field of 1.2 T at 10 mm bore radius and the possibility of auto correction mechanisms. An implemented electrostatic octupole for active field correction will have a maximum field strength in the same order of magnitude as the intrinsic magnetic octupole correction. For an analytical test of the novel concepts of this lens, a multipole detection device on the rotating coil principle has been built. It is capable of measuring small multipole contributions on a strong quadrupole field.    «

At the Munich 15 MV tandem accelerator a new two stage microprobe system Supraleitendes Nanoskop für Angewandte Kernphysikalische Experimente (SNAKE) is currently under construction. In contrast to existing facilities, it is projected to focus up to 30 MeV protons as well as heavy ions with maximum energies of 200 MeV q2/A to a submicron beam spot. In order to achieve this goal, a superconducting lens with inherent multipole corrections and special shaped edges with respect to fringe field calcu...    »