Beam phase measurement system for the K130 cyclotron in Jyväskylä

Evaluation of phase bunching in the central region of a cyclotron by a radial probe with a plastic scintillator

“…Deviation from an isochronous field was reduced to within 7 3 RF degrees by adjusting the current in each trim coil. The beam phase excursion was measured by a pickup-type phase probe, which consists of 10 pairs of parallel electrodes placed radially [11,12]. The acceleration RF phase was adjusted to the top of the sinusoidal dee voltage waveform maximum energy gain within 3 RF degrees, by changing the trim coil fields and acceleration frequency of the dee voltage [13,14].…”