Design Study for a Ten-Bev Magnetic Accelerator

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Abstract
A ten‐billion volt proton synchrotron design using injection from Van de Graaff generators and betatron starting to reduce the required oscillator frequency range is described. Factors affecting the design of the iron core magnet, its power supply, and associated apparatus are discussed. Cost is roughly estimated as fifteen‐ to twenty‐million dollars. The exposition [E. M. McMillan, ``The synchrotron—a proposed high energy particle accelerator,'' Phys. Rev. 68, 143 (1945); V. Veksler, ``Concerning some new methods of acceleration of relativistic particles,'' Phys. Rev. 69, 244 (1946)] and successful test [J. R. Richardson, K. R. MacKenzie, E. J. Lofgren, and B. T. Wright, ``Frequency‐modulated cyclotron,'' Phys. Rev. 69, 669 (1946)] of the synchrotron principle of magnetic particle acceleration has removed one of the limits to the energy obtainable with magnetic accelerators. Radiation loss [E. M. McMillan, ``Radiation from a group of electrons moving in a circular orbit,'' Phys. Rev. 68, 144 (1945)] varying inversely as the rest energy of the particle, is negligible for protons even at ten‐billion electron volts. The maximum obtainable energy therefore appears to be limited only by engineering feasibility and available funds. In order to gain some information on these factors a preliminary design of a proton accelerator has been worked out for what is believed to be the largest machine that could be made in the near future without departing from the techniques used on machines at present in operation. Ten‐billion electron volts, which is in the range of energy of some primary cosmic‐ray particles and the requirements for proton pair formation, appears to be attainable within the above restriction.

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