A high voltage pulse generator is disclosed. The high voltage pulse generator comprises a pulse generating transformer having a primary coil with a first side and a second side, and a secondary coil with a first side and a second side. A direct current (DC) voltage source connection is at the first side of the primary coil. A first high frequency power driver transistor is coupled between the second side of the primary coil and a ground connection. The first high frequency power driver transistor is configured to operate in an on-mode for a selected time period to charge the primary coil for the selected time period based on a switching frequency of the first high frequency power driver transistor, and switch the first high frequency power driver transistor to an off-mode at the switching frequency to release the charge from the primary coil to the secondary coil. A diode is coupled between the first side of the secondary coil and a pulsed voltage output that is configured to be connected to a high voltage device. The diode configured to direct a flow of charge from the secondary coil to charge a capacitance of the high voltage device to a rising pulse leading edge of a voltage pulse.

A method is for closed-loop control of an X-ray pulse chain generated via a linear accelerator system. In an embodiment, the method includes modulating a first electron beam within a first radio-frequency pulse duration, wherein the first multiple amplitude X-ray pulse is produced on modulating the first electron beam; measuring time-resolved actual values of the first multiple amplitude X-ray pulse; adjusting at least one pulse parameter as a function of a comparison of the specified multiple amplitude X-ray pulse profile and the measured time-resolved actual values; and modulating a second electron beam within a second radio-frequency pulse duration as a function of the at least one adjusted pulse parameter for production of the second multiple amplitude X-ray pulse, so the X-ray pulse chain is controlled.

The present application provides a combined machine head and a ray imaging device, wherein the combined machine head comprises: a housing, having an enclosed cavity; a ray tube, arranged in the enclosed cavity; and a pump and a pipe, arranged in the enclosed cavity; wherein the pump is arranged on one side away from an anode of the ray tube, the pipe has a first end connected with an outlet of the pump and a second end extending to be near the anode of the ray tube; or the pump is arranged near the anode of the ray tube, the pipe has a first end connected to an inlet of the pump and a second end extending to one side away from the anode of the ray tube.

The present application provides a combined machine head and a ray imaging device, wherein the combined machine head comprises: a housing, having an enclosed cavity; a ray tube, arranged in the enclosed cavity; and a pump and a pipe, arranged in the enclosed cavity; wherein the pump is arranged on one side away from an anode of the ray tube, the pipe has a first end connected with an outlet of the pump and a second end extending to be near the anode of the ray tube; or the pump is arranged near the anode of the ray tube, the pipe has a first end connected to an inlet of the pump and a second end extending to one side away from the anode of the ray tube.

A voltage-multiplier can be more compact by arrangement in a stack of separate voltage-multiplier-stages. Each of the voltage-multiplier-stages can include electronic-components on a planar-face of a circuit-board. The planar-face of each circuit-board can be parallel with respect to other circuit-boards in the stack. The electronic-components on each voltage-multiplier-stage can be configured to multiply an input-voltage to provide an output-voltage with a higher voltage than the input-voltage. Each voltage-multiplier-stage in the stack can be electrically coupled to two adjacent voltage-multiplier-stages, except that two outermost voltage-multiplier-stages of the stack can be electrically coupled to only one adjacent voltage-multiplier-stage of the stack.

A voltage-multiplier can be more compact by arrangement in a stack of separate voltage-multiplier-stages. Each of the voltage-multiplier-stages can include electronic-components on a planar-face of a circuit-board. The planar-face of each circuit-board can be parallel with respect to other circuit-boards in the stack. The electronic-components on each voltage-multiplier-stage can be configured to multiply an input-voltage to provide an output-voltage with a higher voltage than the input-voltage. Each voltage-multiplier-stage in the stack can be electrically coupled to two adjacent voltage-multiplier-stages, except that two outermost voltage-multiplier-stages of the stack can be electrically coupled to only one adjacent voltage-multiplier-stage of the stack.

A high voltage power system is disclosed. In some embodiments, the high voltage power system includes a high voltage pulsing power supply; a transformer electrically coupled with the high voltage pulsing power supply; an output electrically coupled with the transformer and configured to output high voltage pulses with an amplitude greater than 1 kV and a frequency greater than 1 kHz; and a bias compensation circuit arranged in parallel with the output. In some embodiments, the bias compensation circuit can include a blocking diode; and a DC power supply arranged in series with the blocking diode.

A high voltage power system is disclosed. In some embodiments, the high voltage power system includes a high voltage pulsing power supply; a transformer electrically coupled with the high voltage pulsing power supply; an output electrically coupled with the transformer and configured to output high voltage pulses with an amplitude greater than 1 kV and a frequency greater than 1 kHz; and a bias compensation circuit arranged in parallel with the output. In some embodiments, the bias compensation circuit can include a blocking diode; and a DC power supply arranged in series with the blocking diode.

There is provided voltage switching circuitry (100) for an X-ray tube (10). The voltage switching circuitry comprises a plurality of waveform generators (102) connectable to an output (14) of a voltage generator (12) for supplying an operating voltage to the X-ray tube. Each waveform generator is configured to generate a waveform. At least a first said waveform generator is configured to generate a first sinusoidal waveform having a first frequency and at least a second said waveform generator is configured to generate a second sinusoidal waveform having a second frequency. The second frequency differs from the first frequency by at least a factor of two. The voltage switching circuitry is configured to combine the waveforms at the output to switch the operating voltage between at least two different voltage levels. A plurality of the waveform generators (102) further comprise resonators (202, 204) and amplifiers (206) configured to excite resonance in the respective resonators, wherein the voltage switching circuitry (100) is further configured to switch at least one of the amplifiers which is not being used to excite resonance to generate harmonics for reducing over- or undervoltage when switching the opening voltage between the at least two different voltage levels. The voltage switching circuitry further comprises control circuitry configured to control the switching of the amplifiers.

There is provided voltage switching circuitry (100) for an X-ray tube (10). The voltage switching circuitry comprises a plurality of waveform generators (102) connectable to an output (14) of a voltage generator (12) for supplying an operating voltage to the X-ray tube. Each waveform generator is configured to generate a waveform. At least a first said waveform generator is configured to generate a first sinusoidal waveform having a first frequency and at least a second said waveform generator is configured to generate a second sinusoidal waveform having a second frequency. The second frequency differs from the first frequency by at least a factor of two. The voltage switching circuitry is configured to combine the waveforms at the output to switch the operating voltage between at least two different voltage levels. A plurality of the waveform generators (102) further comprise resonators (202, 204) and amplifiers (206) configured to excite resonance in the respective resonators, wherein the voltage switching circuitry (100) is further configured to switch at least one of the amplifiers which is not being used to excite resonance to generate harmonics for reducing over- or undervoltage when switching the opening voltage between the at least two different voltage levels. The voltage switching circuitry further comprises control circuitry configured to control the switching of the amplifiers.