Abstract

Beam monitors, methods of use and fabrication are provided herein. Beam monitors can include a rounded beam cavity with one or more waveguide connected thereto, from which a signal can be used to determine one or more beam characteristics. Such monitors can include a beam intensity monitor that includes a cylindrical beam cavity with a rectangular waveguide extending from a periphery, from which beam intensity can be determined. An advanced beam monitor can include a multi-moded beam cavity having multiple waveguides connected at distinct locations, each corresponding to a differing excitation mode. Such monitor can include an elliptical beam cavity and five waveguides connected thereto, signals from which can be used to determine beam charge, beam position and beam size in both the x-direction and y-directions. Beam monitors can be stand-alone devices or integrated within linear accelerators. Accelerators can include off-axis beam monitor coupling ports and on-axis tuning features.

IPC Classes  ?

• H05H 7/22 - Details of linear accelerators, e.g. drift tubes
• H05H 9/00 - Linear accelerators

Abstract

Beam monitors, methods of use and fabrication are provided herein. Beam monitors can include a rounded beam cavity with one or more waveguide connected thereto, from which a signal can be used to determine one or more beam characteristics. Such monitors can include a beam intensity monitor that includes a cylindrical beam cavity with a rectangular waveguide extending from a periphery, from which beam intensity can be determined. An advanced beam monitor can include a multi-moded beam cavity having multiple waveguides connected at distinct locations, each corresponding to a differing excitation mode. Such monitor can include an elliptical beam cavity and five waveguides connected thereto, signals from which can be used to determine beam charge, beam position and beam size in both the x-direction and y-directions. Beam monitors can be stand-alone devices or integrated within linear accelerators. Accelerators can include off-axis beam monitor coupling ports and on-axis tuning features.

IPC Classes  ?

• G01T 1/29 - Measurement performed on radiation beams, e.g. position or section of the beamMeasurement of spatial distribution of radiation

Abstract

A linear accelerator having multiple cavities along a beamline that is powered by a pair of distribution waveguide manifolds with a sequence of feed arms connecting the manifolds to the cell sections and a single RF feed is described herein. The distribution waveguide manifolds are connected to the cell sections so that alternating pairs of cell sections are connected to opposite distribution waveguide manifolds. The individual cavities are individually optimized according to the electron speed along the beamline. The geometry of the cell junctions and connecting channels between the manifolds and cavities can be individually optimized along the beamline as well and can include a serpentine configuration to provide a consistent RF channel length between the manifolds and differing cavities. Methods of designing the linear accelerator and fabricating the accelerator are also provided.

IPC Classes  ?

• H05H 7/22 - Details of linear accelerators, e.g. drift tubes
• H05H 9/04 - Standing-wave linear accelerators

Abstract

A linear accelerator having multiple cavities along a beamline that is powered by a pair of distribution waveguide manifolds with a sequence of feed arms connecting the manifolds to the cell sections and a single RF feed is described herein. The distribution waveguide manifolds are connected to the cell sections so that alternating pairs of cell sections are connected to opposite distribution waveguide manifolds. The individual cavities are individually optimized according to the electron speed along the beamline. The geometry of the cell junctions and connecting channels between the manifolds and cavities can be individually optimized along the beamline as well and can include a serpentine configuration to provide a consistent RF channel length between the manifolds and differing cavities. Methods of designing the linear accelerator and fabricating the accelerator are also provided.

IPC Classes  ?

• H05H 9/04 - Standing-wave linear accelerators
• H05H 7/02 - Circuits or systems for supplying or feeding radio-frequency energy
• H01J 23/36 - Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
• H01P 3/12 - Hollow waveguides
• H05H 7/18 - CavitiesResonators

Abstract

Waveguide devices, associated components and methods. Waveguide devices can include a rectangular waveguide having first and second rectangular ports at one end, and first and second circular waveguides extending from opposing broad sides of the waveguide to provide either full isolation or full transmission between first and second ports. The waveguide can include a fixed short at one circular waveguides and a short with adjustable biasing structure at the other circular waveguide to accommodate broader ranges of high-power capabilities. The waveguide device can be stacked by connecting circular waveguides of adjacent structures to provide an isolator with additional ports or an adjustable directional coupler. The adjustable shorting structure can include plunger or screw-type threads. The waveguide can include a rectangular waveguide in a four-port network with a circular waveguide extending to a fifth port supporting two modes of operation, and can be shorted with a contoured disc of non-reciprocal material.

IPC Classes  ?

• H01P 3/123 - Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides

Abstract

Waveguide devices, associated components and methods. Waveguide devices can include a rectangular waveguide having first and second rectangular ports at one end, and first and second circular waveguides extending from opposing broad sides of the waveguide to provide either full isolation or full transmission between first and second ports. The waveguide can include a fixed short at one circular waveguides and a short with adjustable biasing structure at the other circular waveguide to accommodate broader ranges of high-power capabilities. The waveguide device can be stacked by connecting circular waveguides of adjacent structures to provide an isolator with additional ports or an adjustable directional coupler. The adjustable shorting structure can include plunger or screw-type threads. The waveguide can include a rectangular waveguide in a four-port network with a circular waveguide extending to a fifth port supporting two modes of operation, and can be shorted with a contoured disc of non-reciprocal material.

IPC Classes  ?

• H01P 5/12 - Coupling devices having more than two ports
• H01P 1/16 - Auxiliary devices for mode selection, e.g. mode suppression or mode promotionAuxiliary devices for mode conversion
• H01P 3/127 - Hollow waveguides with a circular, elliptic, or parabolic cross-section
• H04B 1/40 - Circuits

Abstract

A photoinjector system containing modularly-structured waveguide-mode launcher, which is reversibly connected to the RF gun (containing a tubular construction formed with disattachably-affixed to one another structurally-complementary halves); and a solenoid magnet in operation enclosing such tubular structure in a central hollow. The resulting quality, power, and frequency rate of operation as well as cost of manufacturing and operation of the system are superior as compared with those of a related art system.

IPC Classes  ?

• H01J 29/48 - Electron guns
• H01J 1/34 - Photo-emissive cathodes
• H01J 3/02 - Electron guns

Abstract

A photoinjector system containing modularly-structured waveguide-mode launcher, which is reversibly connected to the RF gun (containing a tubular construction formed with disattachably-affixed to one another structurally-complementary halves); and a solenoid magnet in operation enclosing such tubular structure in a central hollow. The resulting quality, power, and frequency rate of operation as well as cost of manufacturing and operation of the system are superior as compared with those of a related art system.

IPC Classes  ?

• H01J 29/48 - Electron guns
• H01J 1/34 - Photo-emissive cathodes
• H01J 3/02 - Electron guns