Patents – Edwin Mattison McMillan

McMillan Page · Resources with Additional Information


US 2,615,129 SYNCHRO-CYCLOTRON – McMillan, E. M.; October 21, 1962 (to U.S. Atomic Energy Commission)
In this synchro-cyclotron the frequency modulation of the resonant system depends directly upon the rotating mechanical vacuum capacitor capable of producing frequencies up to the oscillating electric field and varying the ration of the frequency of the oscillation to the magnetic field strength, it is possible to accelerate deuterons to a final energy of 200 Mev.

US 2,624,841 METHOD OF AND APPARATUS FOR ACCELERATING TO HIGH ENERGY ELECTRICALLY CHARGED PARTICLES – McMillan, E. M.; January 6, 1953 (to U.S. Atomic Energy Commission)
This patent describes the synchrotron.

US 2,640,924 ACCELERATOR TARGET – McMillan, E. M.; June 2, 1953 (to U.S. Atomic Energy Commission)
This patent describes an improvement in targets for particle accelerators and a method for producing an intense divergent x-ray beam. The method comprises producing a high-energy electron beam traversing orbital paths of constantly decreasing radium in a electron accelerator, intercepting the electron beam with a thin plate of material having a low atomic number whereby the beam experiences an energy loss from ionization in the plate and the beam focus is substantially unimpaired, and bombarding a thick plate with the electron beam of reduced energy at the same angular point on the beam orbit as the beam interception and at a substantially decreased orbital radius therefrom.

US 2,872,574 CLOVERLEAF CYCLOTRON – McMillan, E. M. and Judd, D. L.; February 3, 1959 (to U.S. Atomic Energy Commission)
A cyclotron is presented embodying a unique magnetic field configuration, which configuration increases in intensity with radius and therefore compensates for the relativistic mass effect, the field having further convolutions productive of axial stability in the particle beam. By reconciling the seemingly opposed requirements of mass increase compensation on one hand and axial stability on the other, the production of extremely high current particle beams in the relativistic energy range is made feasible. Certain further advantages inhere in the invention, notably an increase in the usable magnet gap, simplified and more efficient extraction of the beam from the accelerator, and ready adaptation to the use of multiply phased excitation as contrasted with the single phased systems heretofore utilized.

US 2,933,442 ELECTRONUCLEAR REACTOR – McMillan, E. M.; Lawrence, E. O.; Alvarez, L. W.; April 19, 1960 (to U.S. Atomic Energy Commission)
An electronuclear reactor is described in which a very high-energy particle accelerator is employed with appropriate target structure to produce an artificially produced material in commercial quantities by nuclear transformations. The principal novelty resides in the combination of an accelerator with a target for converting the accelerator beam to copious quantities of low-energy neutrons for absorption in a lattice of fertile material and moderator. The fertile material of the lattice is converted by neutron absorption reactions to an artificially produced material, e.g., plutonium, where depleted uranium is utilized as the fertile material.


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