BUNCH-SHAPE MEASUREMENTS AT PSI'S HIGH-POWER CYCLOTRONS AND PROTON BEAM LINES

Longitudinal-transversal 2D-density distributions of the bunched 2.2 mA CW proton beam can now be measured at the 13 last turns of the Injector 2 cyclotron, at several locations in the connecting beam line to the Ring cyclotron, at the first two turns of the Ring cyclotron (all at energies around 72 MeV), as well as behind the Ring cyclotron (at 590 MeV). In the large part, distributions can be taken from several angles of view, separated each by 45°. The measurement systems at our facility have evolved with time; this paper gives the present status, performance, limits and typical results. Due to the limited space, we refer in the large part to our previous publications [1, 2, 3] and concentrate on recent findings and measurements and ideas for next steps.