| Paper |
Title |
Page |
| TUPLT098 |
Vertical Beam Motion in the AGOR Cyclotron
|
1384 |
| |
- M.A. Hofstee, S. Brandenburg, H. Post, W.K. van Asselt
KVI, Groningen
|
|
| |
Large-scale vertical excursions have been observed in the AGOR cyclotron for light ionbeams at energies close to the focussing limit (E/A =200 Q/A MeV per nucleon). With increasing radius the beam gradually moves down out of the geometrical median plane by several mm, leading to internal beamlosses. It was concluded that this effect is caused by a vertical alignment error of the coils combined with the weak vertical focussing for the beams concerned. Moving the main coils by a total of 0.37 mm has significantly improved the situation at large radii, but results in internal beamlosses for certain beams at small radii due to a large upward excursion. A systematic study of the vertical beam dynamics as a function of beam particle and energy will be presented. Possible causes and solutions will be discussed.
|
|