Abstract
REPORTS1 of existing fixed-frequency cyclotrons indicate that near the maximum energy the ratio between internal and external beam current is about five to one, with the maximum current limited by heating of the septum by the stray beam. If the internal beam could be more accurately aligned at the deflector and the stray beam removed, a larger external beam, better focused and with less energy-spread, could be produced.
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References
Gallop, J. W., “Notes on a Tour of American Fixed Frequency Cyclotrons in the Autumn of 1950”.
Bohm, D., and Foldy, L., Phys. Rev., 72, 649 (1947).
Vonberg, D. D., Internal Technical Memorandum No. 17.
Konrad, M., Ph.D. thesis, University of Birmingham.
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POWELL, W. Improving the Characteristics of the Cyclotron Beam. Nature 177, 1045 (1956). https://doi.org/10.1038/1771045a0
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DOI: https://doi.org/10.1038/1771045a0
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