Patent Number: 
Section: claims

1. A device for irradiating a patient by a charged particle beam, said device comprising a plurality of beam channels each connected to a beam source, each of said channel being fixed in a vertical plane, said device further comprising:one deflecting magnet at the end of each channel, said magnet capable of deflecting the beam over a deflection angle in said vertical plane, anda patient positioning system, comprising means to move the patient in said vertical plane. 2. The device according to claim 1, wherein said angle of deflection is variable within a predefined range, and wherein said patient positioning system comprises means to move the patient in such way that the same point within the patient is irradiated by a beam produced by each of said channels, for different values of said deflection angle. 3. The device according to claim 2, wherein said patient positioning system comprises means to move the patient in all directions in a vertical plane. 4. The device according to claim 1, wherein each of said channels are attached to a vertical wall. 5. The device according to claim 4, wherein each of said channels further comprises at least one sweeping magnet for irradiating an area around said point. 6. The device according to claim 5, wherein said at least one sweeping magnet is in a fixed position and located before said deflecting magnet. 7. The device according to claim 1, wherein said patient positioning system comprises means for rotating said patient around a vertical axis. 8. The device according to claim 1, comprising five channels. 9. The device according to claim 1, comprising three channels.