Speaker
Description
Injector II is part of PSI's high intensity proton accelerator (HIPA)
facility. It is to date the only cyclotron worldwide that makes use
of the a space-charge driven effect ("Vortex Effect") which causes
bunches not to expand but to "roll up" in the horizontal plane.
The effect prevents the cyclotron bunches from expanding
longitudinally so that the phase width stays unusually small
and the former flat-top resonators could be replaced by normal
accelerating resonators. The effect has been simulated in PIC-codes
like OPAL and experimentally verified by bunch shape measurements.
We present measurements of radial probes which contain residual traces
of this effect and we show how it is used to analyze and fit
the beam optics in the transfer line between Injector II and the
Ring Cyclotron.
| Paper status | Proceeding files received |
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