Resources Contact Us Home
Multi-stage cavity cyclotron resonance accelerators

Image Number 5 for United States Patent #6617810.

A high-current, high-gradient, high-efficiency, multi-stage cavity cyclotron resonance accelerator (MCCRA) provides energy gains of over 50 MeV/stage, at an acceleration gradient that exceeds 20 MeV/m, in room temperature cavities. The multi-stage cavity cyclotron resonance accelerator includes a charged particle source, a plurality of end-to-end rotating mode room-temperature cavities, and a solenoid coil. The solenoid coil encompasses the cavities and provides a substantially uniform magnetic field that threads through the cavities. Specifically, the MCCRA is provided with a constant magnetic field sufficient to produce a cyclotron frequency a little higher than the RF of the accelerating electric field. A plurality of input feeds, each of which respectively coupled to a cavity, are also provided. According to an embodiment of the invention, the beam from the first cavity passes through a cutoff drift tube and is accelerated further with a cavity supporting a still lower radio-frequency electric field. This embodiment yields a several-milliampere one-gigavolt proton beam efficiently. The single cavity transfers about 70% of the radio-frequency energy to the beam. A multiple-cavity accelerator using a constant or slightly decreasing static magnetic field along its length and using cutoff drift tubes between the cavities operating at progressively lower frequencies, each somewhat lower than the local relativistic cyclotron frequency of the beam in that cavity, provides an extremely-efficient, compact, continuously-operating, medium-energy accelerator.

  Recently Added Patents
Compositions and methods for concentrating and depleting microorganisms
Translucent internal graphics enhancement
Remotely provisioned wireless proxy
Proton conducting electrolytes with cross-linked copolymer additives for use in fuel cells
Blow moulding machine with compressed air recycling
Voltage regulator with improved voltage regulator response and reduced voltage drop
  Randomly Featured Patents
Light scanning unit
Continuous stationery assembly and methods of making binders, folder covers and the like from the assembly
Thermoforming tool
Pyrrolidine insect control agents
Facsimile machine
Method for handling data of a hearing device and hearing device
Cleaning assistant used with a photosensitive drum unit for lowering charge memory
Aortic cannula
Thermoplastic vinyl chloride polymers containing monoalkyl-tin-stabilizers