83 results about "Pulse forming line" patented technology

A bipolar pulse forming transmission line module for linear induction accelerators having first, second, third, fourth, and fifth planar conductors which form an interleaved stack with dielectric layers between the conductors. Each conductor has a first end, and a second end adjacent an acceleration axis. The first and second planar conductors are connected to each other at the second ends, the fourth and fifth planar conductors are connected to each other at the second ends, and the first and fifth planar conductors are connected to each other at the first ends via a shorting plate adjacent the first ends. The third planar conductor is electrically connectable to a high voltage source, and an internal switch functions to short a high voltage from the first end of the third planar conductor to the first end of the fourth planar conductor to produce a bipolar pulse at the acceleration axis with a zero net time integral. Improved access to the switch is enabled by an aperture through the shorting plate and the proximity of the aperture to the switch.

A bipolar pulse forming transmission line module for linear induction accelerators having first, second, third, fourth, and fifth planar conductors which form an interleaved stack with dielectric layers between the conductors. Each conductor has a first end, and a second end adjacent an acceleration axis. The first and second planar conductors are connected to each other at the second ends, the fourth and fifth planar conductors are connected to each other at the second ends, and the first and fifth planar conductors are connected to each other at the first ends via a shorting plate adjacent the first ends. The third planar conductor is electrically connectable to a high voltage source, and an internal switch functions to short a high voltage from the first end of the third planar conductor to the first end of the fourth planar conductor to produce a bipolar pulse at the acceleration axis with a zero net time integral. Improved access to the switch is enabled by an aperture through the shorting plate and the proximity of the aperture to the switch.

A charged particle beam transport system and method for linear accelerators includes a lens stack having two electrodes serially arranged along an acceleration axis between a charged particle source, and a linear accelerator. After producing and extracting a bunch of charged particles (i.e. particle beam) from the particle source, a voltage difference between the two electrodes is ramped in time to longitudinally compress the particle beam to be shorter than the pulsewidth of acceleration pulses produced in the accelerator. Additional electrodes may be provided in the lens stack for performing transverse focusing of the charged particle bunch and controlling a final beam spot size independent of the current and energy of the particle beam. In a traveling wave accelerator embodiment having a plurality of independently switchable pulse-forming lines, beam transport can also be controlled by triggering multiple adjacent lines simultaneously so that the physical size of the accelerating electric field is longer than the charged particle bunch, as well as by controlling trigger timing of the pulse-forming lines to perform alternating phase focusing.

The invention provides a novel high-pressure square-wave pulse generating system, comprising a primary charging power supply, a control system, a triggering power supply, a multilevel pulse forming line high pressure generating system and a load system, wherein the primary charging power supply is connected with the control system, the control system is connected with the triggering power supply, the multilevel pulse forming line high pressure generating system comprises a plurality of parallel pulse forming lines, the pulse forming lines are connected to two electrodes of the primary charging power supply through inductors, one electrode of one pulse forming line is grounded, and the opposite electrode of the other pulse forming line is connected with the load system and is grounded, gas spark clearance switches are arranged between the pulse forming lines, two switches are connected with the triggering power supply, and the two extraction electrodes of the pulse forming lines are in flat panel output structures. The multilevel of forming lines are serially overlapped to output high pressure pulse square waves, which reduces a level of pulse compression process and simplifies the system.

Methods and apparatus are provided for fabricating and constructing solid dielectric “Coiled Transmission Line” pulse generators in radial or axial coiled geometries. The pour and cure fabrication process enables a wide variety of geometries and form factors. The volume between the conductors is filled with liquid blends of monomers, polymers, oligomers, and / or cross-linkers and dielectric powders; and then cured to form high field strength and high dielectric constant solid dielectric transmission lines that intrinsically produce ideal rectangular high voltage pulses when charged and switched into matched impedance loads. Voltage levels may be increased by Marx and / or Blumlein principles incorporating spark gap or, preferentially, solid state switches (such as optically triggered thyristors) which produce reliable, high repetition rate operation. Moreover, these Marxed pulse generators can be DC charged and do not require additional pulse forming circuitry, pulse forming lines, transformers, or an a high voltage spark gap output switch. The apparatus accommodates a wide range of voltages, impedances, pulse durations, pulse repetition rates, and duty cycles. The resulting mobile or flight platform friendly cylindrical geometric configuration is much more compact, light-weight, and robust than conventional linear geometries, or pulse generators constructed from conventional components. Installing additional circuitry may accommodate optional pulse shape improvements. The Coiled Transmission Lines can also be connected in parallel to decrease the impedance, or in series to increase the pulse length.

The invention discloses a coaxial two-stage reentrant pulse forming line so as to solve the technical problem of structural complexity of an existing pulse forming line. The technical scheme includes that the coaxial two-stage reentrant pulse forming line comprises a reentrant forming line segment, a main switch segment and a load segment. The reentrant forming line segment comprises four metal cylinders identical in length, a rear end cover and an insulated filling dielectric, the diameters of the four metal cylinders decrease gradually, and the four metal cylinders include an external forming line cylinder, a middle forming line cylinder, a fourth forming line cylinder and an internal forming line cylinder, are sleeved together to form an integrated coaxial structure and form three pulse forming lines including an external line, a middle line and an internal line. The coaxial two-stage reentrant pulse forming line has the advantages that output pulse width of the coaxial two-stage reentrant pulse forming line is three times of that of a coaxial line in the background art, and matched output impedance of the coaxial two-stage reentrant pulse forming line is three times of external line wave impedance, so that energy transmission efficiency of a high-resistance load can be improved; in order to achieve the same output pulse width, the length of the coaxial two-stage reentrant pulse forming line is one third of that of each of a coaxial single line and a coaxial Blumlein line; the coaxial two-stage reentrant pulse forming line is simple in structure.

The invention discloses a rolled strip pulse forming line based on a high energy storage density liquid medium, which is designed to solve the problems of small output pulse width, large volume and weight, irrecoverability after breakdown, etc. The invention comprises the high energy storage density liquid medium, metal strips, a retaining plate, and an insulation encapsulation part. The metal strips are in the slots of the retaining plate. The retaining plate is in the insulation encapsulation part. The high energy density liquid medium is poured into the insulation encapsulation part, which surrounds all the metal strips and fills the entire inner space of the insulation encapsulation part. The metal strips are consisted of three swirly convoluted metal strips. The shape of the slots of the retaining plate is swirl lines. In the invention, long conductor length is obtained in a small geometric space with excellent electromagnetic shielding being guaranteed. The energy density is increased. Moreover, the pulse width of the output quasi square wave pulse is increased effectively. Besides, the device is easy to build and maintain with low cost. The invention is appropriate for a high voltage electrical pulse generating system.

The invention provides a Brew Rayne pulse-forming line voltage multiplier. The voltage multiplier is formed by stacking of a plurality of single-stage flat-plate Brew Rayne pulse-forming lines in a crossed mode, and each single-stage flat-plate Brew Rayne pulse-forming line comprises a ceramic solid-state flat-plate transmission line, a GaAs photoconductor switch, a laser diode triggering system and a non-inductive resistance load. The single-stage flat-plate Brew Rayne pulse-forming lines are compactly distributed on a platform to form a multi-stage stacking flat-plate Brew Rayne pulse-forming line voltage multiplier. According to the Brew Rayne pulse-forming line voltage multiplier, short pulse high voltage output several times higher than the amplitude of output voltage of each ingle-stage flat-plate Brew Rayne pulse-forming line and with a nanosecond pulse width can be obtained, and through the fact that multiple groups of multi-stage stacking flat-plate Brew Rayne pulse-forming line voltage multiplier can be formed by multiple groups of multi-stage flat-plate Brew Rayne pulse-forming line voltage multipliers or multi-stage stacking flat-plate Brew Rayne pulse-forming line with more stages are designed, short pulse high voltage with a higher voltage amplitude and higher peak power can be obtained.

The invention provides a pulse modulator, belonging to the technical field of high voltage, the pulse modulator comprises a power supply, a control unit, an energy storage unit, an accurate triggeringunit and a TESLA transformer with a built-in pulse forming line, and a main switch, and a diode. The energy storage unit is used for electric energy storage and first-stage energy compression, the TESLA transformer with the built-in pulse forming line is used for pulse boosting and energy transmission, and the main switch is used for second-stage energy compression. By optimizing the internal circuit structure and systematically integrating integrated components, the pulse modulator has the advantages of being small in number of separated components, small in size, light in weight and the like, miniaturization and compactness of the high-voltage large-current pulse modulator are truly achieved in engineering, and a foundation is laid for practical application in multiple fields and occasions.