Patent ID: 9730308
Date: 2017-08-08
CPC Classifications: A61N,H05H

Claim:
1. A synchrocyclotron comprising: a voltage source to provide a radio frequency (RF) voltage to a cavity to accelerate particles from a particle source; one or more coils to pass electrical current having one of multiple values and to generate a magnetic field in the cavity corresponding to the electrical current, the magnetic field for causing the particles to move orbitally within the cavity at an energy that corresponds to the electrical current, the magnetic field being at least 4 Tesla; magnetic pole pieces at least partly defining the cavity, the magnetic pole pieces comprising ferromagnetic material; and an extraction channel to receive the particles from the cavity and to output the particles, the particles that are output having an energy that corresponds to the electrical current; wherein the synchrocyclotron is configured to enable setting of the electrical current to one of the multiple values, each of the multiple values corresponding to a different energy at which particles are output from the cavity; wherein the energy of the particles that are output from the cavity is in a range that is between about 100 MeV and about 300 MeV; and wherein the voltage source is configured to sweep the RF voltage over different frequency ranges, each different frequency range corresponding to a different energy at which particles are output from the cavity.