Isochronism of the ACCEL 250 MeV medical proton cyclotron

Beam phase measurements performed during the commissioning of the ACCEL 250 MeV medical proton cyclotrons are presented and compared to results of orbit tracking computations based on high accuracy magnetic field map measurements. The agreement between measured and intended beam phase behavior was found to be excellent. (c) 2006 Elsevier B.V. All rights reserved.