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HK: Physik der Hadronen und Kerne

HK 25: Instrumentation and Applications III

HK 25.5: Vortrag

Mittwoch, 10. März 2004, 12:00–12:15, C

Spin movement in a figure of 8 accelerator — •K. Kilian, A. Lehrach, and R. Maier — Institut für Kernphysik, Forschungszentrum Jülich, 52425 Jülich

The spin vector of particles stored in a planar ring synchrotron can be stabilized in the vertical direction. Horizontal components in the plane of the accelerator average to zero very fast. A planar figure of 8 accelerator without any horizontal magnetic field components would restore any spin orientation at a given position in every turn. Small horizontal disturbances, especially from fringe fields will lead to comparatively slow spin movement which will make in average polarisation zero. If this movement is slow enough and coherent one might use this in experiments. Combination of the crossover accelerator structure with Wienfilters or Solenoids open some new possibilities for spin stabilization.