Cyclotron with beam phase selector

Details Cyclotron with beam phase selector Cyclotron with beam phase selector

2008-01-01

2008-01-01

Owens, Douglas W. (Department: 2821)

Electric lamp and discharge devices: systems

High energy particle accelerator tube

Magnetic field acceleration means

C315S507000, C313S062000, C250S42300F, C250S492300

Reexamination Certificate

active

11050817

ABSTRACT:
Disclosed here is a cyclotron having a beam phase selector capable of controlling phase widths of beams and improving beam permeability for increasing beam current. The cyclotron contains an acceleration voltage applying section and a beam blocking section, at least any one of the two sections has a movable structure. While a particle is passing across a gap between dee electrodes, the acceleration voltage applying section applies RF acceleration voltage to the particle, and further applies RF acceleration voltage having a phase different from the phase of previously applied RF acceleration voltage. The beam blocking section blocks undesired particles. Preferably, the acceleration voltage applying section at least has an electrode having an opening in a direction of the core of the cyclotron. Also preferably, operations on phase-width control can be performed outside the cyclotron, with vacuum condition in the cyclotron maintained.

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Kondo, M. “Recent Developments at the Osaka RCNP 230-CM Cyclotron and a Proposal for a New Ring Accelerator”,IEEE Trans on Nuclear Science, NS-26, 2, pp. 1904-1911.
“Recent Developments of the Ring Cyclotron”,Nucleus Researchvol. 36, No. 2, pp. 3-15, 1991 and in Miura, I., “The Research Center for Nuclear Physics Ring Cyclotron”,Proceedings of the 1993 Particle Accelerator Conferencevol. 3 of 5, pp. 1650-1654.
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Sasaki, Y., et al., “A New Beam Phase Selector for the AVF Cyclotron”,RCNP Annual Report1996, pp. 178-181.

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