Moxtek, Inc.

Motek, Inc.

Dongbing Wang

Dave Reynolds

Brian Taylor

William H Hansen

An x-ray source for improved electron beam control, a smaller electron beam spot size, and a smaller x-ray spot size with reduced power supply size and weight. A method for improved electron beam control, a smaller electron beam spot size, and a smaller x-ray spot size with reduced power supply size and weight. Grid(s) may be used in an x-ray tube for improved electron beam control, a smaller electron beam spot size, and a smaller x-ray spot size. Control circuitry for the grid(s) can be disposed in electrically insulative potting. Light may be used to provide power and control signals to the control circuitry.

Grid voltage generation for x-ray tube

A high voltage device includes a circuit boardsurrounded by an enclosure, pottingto provide electrical insulation between the circuit boardand the enclosure, and a layer of material, having a different resistivity than a resistivity of the potting, dividing the potting into separate and discrete sections. The layer of materialcan be multiple layers. Each layercan have a voltage applied, and a voltage of any layercloser to the circuit boardcan have a higher absolute value than any layerfarther from the circuit board

Electric potential control of high voltage insulation

A transformer network circuit utilizing multiple smaller transformer cores, instead of a single, relatively larger core, for transferring electrical power while maintaining a smaller overall core mass.

Transformer network

A compact x-ray source can include a circuit () providing reliable voltage isolation between low and high voltage sides () of the circuit while allowing AC power transfer between the low and high voltage sides of the circuit to an x-ray tube electron emitter (). Capacitors () can provide the isolation between the low and high voltage sides of the circuit. The x-ray source () can utilize capacitors of a high voltage generator () to provide the voltage isolation. A compact x-ray source () can comprise a single transformer core () to transfer alternating current from two alternating current sources () to an electron emitter () and a high voltage generator (). A compact x-ray source () can comprise a high voltage sensing resistor (R) disposed on a cylinder () of an x-ray tube ().

Compact X-ray source

An electrical circuit for alternating current generation comprising a direct current control box, a first inductor, a second inductor, a first capacitor, and dual load connections. The direct current control box can alternately provide positive direct current to the first inductor then negative direct current to the second inductor. A second end of each inductor can be electrically connected together and electrically connected to a first load connection. A common connection on the control box can be electrically connected to a second load connection. The first load connection and the second load connection can be configured to be electrically connected across a load. A first capacitor can be electrically connected between the first load connection and the second load connection and configured to be electrically connected in series or parallel parallel with the load.

Inductor switching LC power circuit

A high voltage sensing resistor disposed on a cylinder that at least partially surrounds an evacuated enclosure of an x-ray tube.

X-ray tube high voltage sensing resistor

A high voltage circuit with arc protection comprises a circuit board, having a top surface and a bottom surface, and includes at least two electronic components in a circuit. An enclosure substantially surrounds the circuit board. A voltage differential of at least 5000 volts can exist between the enclosure and at least one of the electronic components. At least one electrically conductive plate is disposed between the top surface of the circuit board and the enclosure, disposed between the bottom surface of the circuit board and the enclosure, electrically insulated from the circuit board and the enclosure, and provides arc protection between at least one electronic component on the circuit board and the enclosure.

High voltage circuit with arc protection

An x-ray source can include an x-ray tube and a power supply. The x-ray tube can be removably affixed to the power supply in a rigid manner with the x-ray tube movable and holdable along with the power supply when affixed thereto. A releasable coupling between the x-ray tube and the power supply can create an interface defining a potential arc path. A means, such as a non-linear plug and socket junction, a gasket, or an electrically conductive sleeve, can be used for resisting arcing along the potential arc path.

X-ray tube to power supply connector

A reduced power consumption x-ray source comprising:

Reduced power consumption X-ray source

A high voltage sensing circuit with temperature compensation comprises a first series of resistors in parallel with a second series of resistors. The first series includes a material with a different temperature coefficient of resistance than in the second series. A voltage measurement circuit calculates a high voltage by use of a voltage across a resistor in the first series and a voltage differential between the series.

Thermal compensation signal for high voltage sensing

A cold electron number amplifier device can provide a greater number of electrons at lower electron emitter temperature. The cold electron number amplifier device can comprise an evacuated enclosure, a first electron emitterattached to the evacuated enclosure, and an electrically conductive second electron emitteralso attached to the evacuated enclosure. The first electron emittercan be configured to emit electronswithin the evacuated enclosure. The second electron emittercan have a voltage Vgreater than a voltage Vof the first electron emitter(V&#x3e;V). The second electron emittercan be positioned to receive impinging electronsfrom the first electron emitter. Electronsfrom the first electron emittercan impart energy to electrons in the second electron emitterand cause the second electron emitterto emit more electrons

Cold electron number amplifier

A circuit providing reliable voltage isolation between a low and high voltage sides of a circuit while allowing AC power transfer between the low and high voltage sides of the circuit to an x-ray tube filament. Capacitors provide the isolation between the low and high voltage sides of the circuit.

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Lathrop, CA, United States of America

Dongbing Wang