Jay L Hirshfield

US Patent:

6914396, Jul 5, 2005

Filed:

Jul 31, 2001

Appl. No.:

09/921529

Inventors:

Robert Spencer Symons - Los Altos CA, US
Jay L. Hirshfield - Hamden CT, US
Changbiao Wang - New Haven CT, US

Assignee:

Yale University - New Haven CT
L-3 Communications Corporation - San Carlos CA

International Classification:

H05H013/00

US Classification:

315500, 315501, 315502, 250292

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.

US Patent:

7786675, Aug 31, 2010

Filed:

Apr 13, 2007

Appl. No.:

11/785058

Inventors:

Vyacheslav P. Yakovlev - Hamden CT, US
Sergey Y. Kazakov - Ibaraki-ken, JP
Jay L. Hirshfield - Hamden CT, US

Assignee:

Omega-P, Inc. - New Haven CT

International Classification:

H05H 7/22

US Classification:

315 539, 315 541, 315505

Abstract:

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.

US Patent:

7816870, Oct 19, 2010

Filed:

Nov 17, 2006

Appl. No.:

11/600920

Inventors:

Vyacheslav P. Yakovlev - Hamden CT, US
Sergey Y. Kazakov - Ibaraki-ken, JP
Jay L. Hirshfield - Hamden CT, US

Assignee:

Omega-P, Inc. - New Haven CT

International Classification:

H05H 7/22

US Classification:

315 539, 315 541, 315505

Abstract:

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.

US Patent:

8324810, Dec 4, 2012

Filed:

Jan 22, 2010

Appl. No.:

12/692204

Inventors:

Sergey Yu Kazakov - Batavia IL, US
Sergey V. Kuzikov - Nizhny Novgorod, RU
Jay L. Hirshfield - Hamden CT, US
Vyachesav Yakovlev - Batavia IL, US
Yong Jiang - New Haven CT, US

Assignee:

Omega-P, Inc. - New Haven CT

International Classification:

H05H 9/00
H05H 25/50

US Classification:

315 3951, 315505

Abstract:

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.

US Patent:

44581483, Jul 3, 1984

Filed:

Jun 22, 1981

Appl. No.:

6/276087

Inventors:

Jay L. Hirshfield - Hamden CT
Mahadevan Krishnan - New Haven CT

Assignee:

Omega-P, Inc. - New Haven CT

International Classification:

H01J 4926
H01J 2724
H01J 124

US Classification:

250284

Abstract:

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.

US Patent:

20160071681, Mar 10, 2016

Filed:

Sep 4, 2015

Appl. No.:

14/846151

Inventors:

- New Haven CT, US
Vladimir Teryaev - Protvino, RU
Jay Hirshfield - Orange CT, US

International Classification:

H01J 23/027
H01J 25/10

Abstract:

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.