Multi-stage cavity cyclotron resonance accelerator

Details Multi-stage cavity cyclotron resonance accelerator Multi-stage cavity cyclotron resonance accelerator

2005-07-05

2005-07-05

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

High energy particle accelerator tube

C315S501000, C315S502000, C250S292000

Reexamination Certificate

active

06914396

ABSTRACT:
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. In another embodiment of the invention, the progressively lower frequencies are selected to decrease in substantially equal increments corresponding to a difference frequency. The charged particles are emitted in pulses in correspondence with the difference frequency.

REFERENCES:
patent: 4215291 (1980-07-01), Friedman
patent: 5578909 (1996-11-01), Billen
patent: 6107628 (2000-08-01), Smith et al.
patent: 6617810 (2003-09-01), Symons
By R.S. Symons and H.R. Jory “Cyclotron Resonance Devices” 1981 Copyright by Academic Press Inc. ISBN 0-12-014655-X, p. 1-75; Advances in Electronics and Electron Physics, vol. 55, Varian Associates, Palo Alto, California.
By J.L. Hirshfield, M.A. LaPointe and A.K. Ganguly, R.B. Yoder and Changbiao Wang; “Multimegawatt Cyclotron Autoresonance Accelerator” 1996 American Institute of Physics; Physics Plasmas vol. 3, No. 5, May 1996, p. 2163-2168.
By M.A. LaPointe, R.B. Yoder, Changbiao Wang, A.K. Ganguly and J.L. Hirshfield ; “Experimental Demonstration of High Efficiency Electron Cyclotron Autoresonance Acceleration” 1996 The American Physical Society , vol. 76, No. 15, Pg 2718-2721, Physical Review Lettera, Apr. 8, 1996.
By R.M. Hutcheon, L.D. Hansborough, K.J. Hohban and S.O. Schriber; RFQ Linac Structure Developments at CRNL 1983 IEEE Transactions on Nuclear Science, vol. NS-30, No. 4, Aug. 1983; Atomic Energy of Canada Limited, Research Company, Chalk River Nuclear Laboratories, Chalk River, Ontario, Canada; XP-001042071; PD: Mar. 21, 1983; pp. 3521-3523.
By Changbiao Wang and J.L. Hirshfield, Multistage Cyclotron Autoresonance Accelerator Jun. 1998 Physical Review E, vol. 57, No. 6; Physics Department, Yale University, New Haven, Connecticut and Omega P Incorporated, Yale Station, New Haven, Connecticut,; PD: 00-00-1998; pp. 7184-7191.
By J.L. Hirshfield, Changbiao Wang and Robert Symons, Multi-Stage, High-Gradient, Cyclotron Resonance Proton Accelerator Concept XP-001059769; Beam Physics Laboratory, Yale Univ. New Haven, CT, Omega-P, Inc. New Haven, CT, Litton Electron Devices Division, San Carlos, CA; CP569, Advanced Accelerator Concepts; 2001 American Institute of Physics 0-7354-0005-9/01; PD-Oct. 6, 2000; pp. 833-843.
By Luis ugozzoli and R. Bruce Wallace, Application of an Allele-Specific Polymerase Chain Reaction to the Direct Determination of ABO Blood Group Genotypes XP-008000234; Genomics 12,670-674 (1992); Department of Molecular Biochemistry, Beckman Research Institute of the City of Hope, 1450 East Duarte Road, California; PD-Apr. 1992; pp. 670-674.
By Changbiao Wang and J.L. Hirshfield “Energy Limit in Cyclotron Autoresonance Acceleration” 1995 The American Physical Society, Physical Review E, vol. 51, No. 3, Mar. 1995, p. 2456-2464.
By H.R. Jory and A.W. Trivelpiece “Charged-Particle Motion in Large-Amplitude Electromagnetic Fields” Jun. 1968, Journal of Applied Physics, vol. 10, No. 7, p. 3053-3060.

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