Omega-p, Inc.

Yale University

Omega-p R&d, Inc.

L-3 Communications Corporation

Jay L Hirshfield

Yong Jiang

Vyacheslav P Yakovlev

Sergey Y Kazakov

Robert Spencer Symons

Vladimir Teryaev

Sergey Kazakov

Changbiao Wang

Mahadevan Krishnan

Sergey V Kuzikov

Sergey V Shchelkunov

Vyachesav Yakovlev

Apparatuses and methods for accelerating electrons including an electron source configured to provide a beam of electrons and an accelerator utilize electron cyclotron resonance acceleration (eCRA). The accelerator includes a radio frequency (RF) cavity having a longitudinal axis, one or more inlets, and one or more outlets and an electro-magnet substantially surrounding at least a portion of the cavity and configured to produce an axial magnetic field. At least one pair of waveguides couple the cavity to an RF source configured to generate an RF wave. The RF wave is a superposition of two orthogonal TEtransverse electric modes excited in quadrature to produce an azimuthally rotating standing-wave mode configured to accelerate the beam of electrons axially entering the cavity with non-linear cyclotron resonance acceleration.

Compact cyclotron resonance high-power acceleration for electrons

Apparatuses and methods for accelerating charged particles including a charged particle source configured to provide charged particles, an accelerator including: a cavity having one or more inlets and one or more outlets, an electro-magnet substantially surrounding at least a portion of the cavity, a conductor disposed longitudinally within the cavity configured to accelerate the charged particles entering the cavity through the one or more inlets via a radio frequency wave applied to the cavity, wherein the radio frequency wave operates in transverse electromagnetic mode, and a target configured to receive the accelerated charged particles via the one or more outlets.

Apparatus and method for isotope production based on a charged particle accelerator

A depressed beam collector and an RF source comprising a depressed beam collector. The RF source may include, e.g., a multi-beam klystron, a single beam klystron, or other RF sources having an electron gun. The beam collector collects spent electrons from the electron gun and comprises a grounded portion configured to collect a portion of electrons entering the collector and a biased portion configured to collect another portion of the electrons entering the collector and having a depressed energy.

Partially grounded depressed collector

A two-beam accelerator device including a drive beam source and an accelerated beam source for providing a drive beam and accelerated beam, a detuned resonant cavity disposed in the path of the drive beam and the accelerated beam, and a two-beam focusing device and method of use thereof. The detuned resonant cavity may be rectangular, square, axisymmetrical, and/or cylindrical. The focusing device may include a modified quadrupole magnet having four magnets, a central opening, a channel in the central opening, an opening in one of the four magnets, the opening having a non-magnetic channel lined with a magnetic material.

Multi-mode, multi-frequency, two-beam accelerating device and method

A method and systems for fast ferroelectric tuning of RF power used in a particle accelerating system. By adjusting the voltages fed to the ferroelectric phase shift controller, the amplitude and phase of the RF power wave are altered, thus changing the coupling of the power generating circuit and the superconducting cavity. By altering this coupling rapidly, maximum power transfer efficiency can be achieved, which is important given the large amounts of power shunted through the particle accelerating system. In one embodiment, the ferroelectric tuner is optimally made of a magic-T waveguide circuit element and two phase shifters, although other implementations of the system may be utilized.

Fast ferroelectric phase shift controller for accelerator cavities

The present invention relates to methods and systems for fast ferroelectric tuning of RF power used in a particle accelerating system. By adjusting the voltages fed to the ferroelectric phase shift controller, the amplitude and phase of the RF power wave are altered, thus changing the coupling of the power generating circuit and the superconducting cavity. By altering this coupling rapidly, maximum power transfer efficiency can be achieved, which is important given the large amounts of power shunted through the particle accelerating system. In one embodiment, the ferroelectric tuner is optimally made of a magic-T waveguide circuit element and two phase shifters, although other implementations of the system may be utilized. Alternative phase shifters are shown.

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.

Multi-stage cavity cyclotron resonance accelerator

The present invention is directed to a method and apparatus for centrifugally separating substances of different atomic weights. The substances to be separated are positioned in an evacuated vessel which has a longitudinal axis. A magnetic field is generated in the vessel parallel to the longitudinal axis of the vessel and a target comprised of the substances to be separated is positioned within the vessel at one end thereof. A collector is positioned at the other end of the vessel. Pulsed laser energy is focused on the substances to be separated thereby fully ionizing at least a portion of the substances and forming a plasma therefrom. Immediately following the focusing of the laser energy, a current is passed through the substances to be separated which causes further full ionization of the substances and thereby the formation of additional plasma. The ionized plasma is rotated and moved from the substances which are to be separated to a collector by the application of the magnetic field. At least a portion of the ionized substances are separated by the centrifugal force resulting from the rotation of the plasma by the magnetic field.

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Hamden, CT, United States of America

Jay L Hirshfield