Abstract: Provided is a beam diagnostic system for a neutron capture therapy system. The neutron capture therapy system includes a charged particle beam, a charged particle beam inlet for passing the charged particle beam, a neutron generating unit generating a neutron beam by a nuclear reaction with the charged particle beam, and a beam shaping assembly for adjusting flux and quality of the neutron beam generated by the neutron generating unit and a beam outlet adjoining to the beam shaping assembly. The charged particle beam inlet is accommodated into the beam shaping assembly and the neutron generating unit is accommodated in the beam shaping assembly. The beam diagnostic system includes a charged particle beam diagnostic device and a neutron beam diagnostic device, and the beam diagnostic system is used to simultaneously diagnose whether the neutron capture therapy system and/or the beam diagnostic system is malfunctioning.

Abstract: Provided herein are high energy ion beam generator systems and methods that provide low cost, high performance, robust, consistent, uniform, low gas consumption and high current/high-moderate voltage generation of neutrons and protons. Such systems and methods find use for the commercial-scale generation of neutrons and protons for a wide variety of research, medical, security, and industrial processes.

Abstract: Described herein are neutron generators that employ direct field ionization of ionizable fusion gases, as well as well-logging tools and methods that utilize such neutron generators. In various embodiments, the neutron generator includes a cylindrical field-ionization structure distributed around the inner surface of a tubular housing, and a cylindrical ion-accelerating grid disposed about the longitudinal axis concentrically to the field-ionization structure. Ions generated by the field-ionization structure may accumulate inside the ion-accelerating grid, from which they can be axially extracted and accelerated towards a fusion target. Additional tools, systems, and methods are disclosed.

Abstract: An exothermic reaction of hydrogen/deuterium loaded into a metal or alloy is triggered by controlling the frequency of a hydrogen/deuterium plasma in a reaction chamber. The plasma frequency is controlled by adjusting its electron density, which in turn is controlled by adjusting the pressure within the reaction chamber. An exothermic reaction is generated at certain discrete plasma frequencies, which correspond to the optical phonon modes of D-D, H-D, and H—H bonds within the metal lattice. For example, in palladium metal, the frequencies are 8.5 THz, 15 THz, and 20 THz, respectively.

Abstract: Systems, methods, and apparatuses to identify functional issues of a neutron radiation generator are described. In certain aspects, a method includes receiving an operation extractor signal from an extractor electrode of a radiation generator, determining a calculated extractor signal of the radiation generator, and comparing the operation extractor signal to the calculated extractor signal. The calculated extractor signal may be determined from an operation acceleration signal from an acceleration member of the radiation generator, an operation electron beam signal from electrons backstreaming in the radiation generator, an ion signal of an ion beam of the radiation generator, or a combination thereof.

Abstract: Systems, methods, and devices for inelastic gamma-ray logging are provided. In one embodiment, such a method includes emitting neutrons into a subterranean formation from a downhole tool to produce inelastic gamma-rays, detecting a portion of the inelastic gamma-rays that scatter back to the downhole tool to obtain an inelastic gamma-ray signal, and determining a property of the subterranean formation based at least in part on the inelastic gamma-ray signal. The inelastic gamma-ray signal may be substantially free of epithermal and thermal neutron capture background.

Abstract: A neutron generator includes an ion source disposed in a pressurized environment containing an ionizable gas. The ion source includes a substrate with a bundle of carbon nanotubes extending therefrom. The ends of the nanotubes are spaced from a grid. Ion source voltage supply circuitry supplies a positive voltage potential between the substrate and the grid of the ion source to cause ionization of the ionizable gas and emission of ions through the grid. An ion accelerator section is disposed between the ion source and a target. The ion accelerator section accelerates ions that pass through the grid towards the target such that collisions of the ions with the target cause the target to generate and emit neutrons therefrom. The ion source, accelerator section and target are housed in a sealed tube and preferably the carbon nanotubes of the bundle are highly ordered with at least 106 carbon nanotubes per cm2 that extend in a direction substantially parallel to the central axis of the tube.

Abstract: A betavoltaic power source. The power source comprises a source of beta particles, one or more regions for collecting the beta particles and for generating electron hole pairs responsive thereto, and a secondary power source charged by a current developed by the electron hole pairs.

Abstract: There is provided a liquid metal target forming apparatus, including a nozzle that forms a liquid metal target in space, which is irradiated with a proton beam, by ejecting liquid metal thereto. A portion where a region that receives a proton beam of the liquid metal target is formed in a discharge port of the nozzle has a concavo-convex shape.

Abstract: A method of processing one or more surfaces is provided, comprising: providing a switchable ion gun which is switchable between a cluster mode setting for producing an ion beam substantially comprising ionized gas clusters for irradiating a surface and an atomic mode setting for producing an ion beam substantially comprising ionized gas atoms for irradiating a surface; and selectively operating the ion gun in the cluster mode by mass selecting ionized gas clusters using a variable mass selector thereby irradiating a surface substantially with ionized gas clusters or the atomic mode by mass selecting ionized gas atoms using a variable mass selector thereby irradiating a surface substantially with ionized gas atoms.

Abstract: A radiation generator includes at least three extractor electrodes, with an ion source upstream of the at least three extractor electrodes to emit ions in a downstream direction toward the at least three extractor electrodes. There is a target downstream of the at least three extractor electrodes. The at least three extractor electrodes have independently selectable potentials so as to allow direction of an ion beam, formed from the ions, by the independently selectable potentials, toward different longitudinal and lateral regions of the target.

Abstract: Systems, methods, and apparatuses to determine an operation gas pressure in a neutron radiation generator are described. In certain aspects, a method to determine the operation gas pressure includes receiving an operation radiation signal from a radiation generated by electrons backstreaming in a radiation generator, and determining from the operation radiation signal an operation gas pressure in a chamber of the radiation generator. An operation radiation signal may be received from a radiation detector associated with a neutron radiation generator. A radiation detector may detect radiation produced by particles (e.g., electrons) striking a portion (e.g., a cathode) of the neutron radiation generator.

Abstract: Short pulse neutron generators are described herein. In a general embodiment, the short pulse neutron generator includes a Blumlein structure. The Blumlein structure includes a first conductive plate, a second conductive plate, a third conductive plate, at least one of an inductor or a resistor, a switch, and a dielectric material. The first conductive plate is positioned relative to the second conductive plate such that a gap separates these plates. A vacuum chamber is positioned in the gap, and an ion source is positioned to emit ions in the vacuum chamber. The third conductive plate is electrically grounded, and the switch is operable to electrically connect and disconnect the second conductive plate and the third conductive plate. The at least one of the resistor or the inductor is coupled to the first conductive plate and the second conductive plate.

Abstract: A method for determining a bulk formation density using a neutron generator includes detected secondary gamma rays and evaluating the detected gamma rays according to pre-determined selection criteria. Selected gamma rays are then used to compute the formation density. The selection criteria may include, for example, a time delay between the detection of a neutron and an associated particle and/or a direction of propagation of the neutron.

Abstract: Aspects of the invention relate to several methods to deposit and regenerate target materials in neutron generators and similar nuclear reaction devices. In situ deposition and regeneration of a target material reduces tube degradation of the nuclear reaction device and covers impurities on the surface of the target material at the target location. Further aspects of the invention include a method of designing a target to generate neutrons at a high efficiency rate and at a selected neutron energy from a neutron energy spectrum.

Abstract: A neutron generator includes an ion source disposed in a pressurized environment containing an ionizable gas. The ion source includes a substrate with a bundle of carbon nanotubes extending therefrom. The ends of the nanotubes are spaced from a grid. Ion source voltage supply circuitry supplies a positive voltage potential between the substrate and the grid of the ion source to cause ionization of the ionizable gas and emission of ions through the grid. An ion accelerator section is disposed between the ion source and a target. The ion accelerator section accelerates ions that pass through the grid towards the target such that collisions of the ions with the target cause the target to generate and emit neutrons therefrom. The ion source, accelerator section and target are housed in a sealed tube and preferably the carbon nanotubes of the bundle are highly ordered with at least 106 carbon nanotubes per cm2 that extend in a direction substantially parallel to the central axis of the tube.

Abstract: An apparatus for the generation of neutron/gamma rays is described including a chamber which defines an ion source, said apparatus including an RF antenna positioned outside of or within the chamber. Positioned within the chamber is a target material. One or more sets of confining magnets are also provided to create a cross B magnetic field directly above the target. To generate neutrons/gamma rays, the appropriate source gas is first introduced into the chamber, the RF antenna energized and a plasma formed. A series of high voltage pulses are then applied to the target. A plasma sheath, which serves as an accelerating gap, is formed upon application of the high voltage pulse to the target. Depending upon the selected combination of source gas and target material, either neutrons or gamma rays are generated, which may be used for cargo inspection, and the like.

Abstract: Disclosed herein is a high current solid target for radioisotope production at a cyclotron using a metal foam, and more specifically, a high current solid target for isotope production, which attaches a metal foam to the rear surface of the solid target plate. A high current solid target for isotope production including a metal foam according to the present invention may exhibit excellent cooling performances to increase the amount of proton beam current irradiated on the solid target compared to conventional planar-type solid targets. Because the irradiation of the increased proton beam current may increase the amount of an isotope produced per unit time and even an irradiation of proton beam in a short time may allow for production of a desired amount of an isotope, the solid target may be usefully used for production of medical cyclotron nuclides.

Abstract: Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation.

Abstract: Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation.

Abstract: An ion source includes a conductive substrate, the substrate including a plurality of conductive nanostructures with free-standing tips formed on the substrate. A conductive catalytic coating is formed on the nanostructures and substrate for dissociation of a molecular species into an atomic species, the molecular species being brought in contact with the catalytic coating. A target electrode placed apart from the substrate, the target electrode being biased relative to the substrate with a first bias voltage to ionize the atomic species in proximity to the free-standing tips and attract the ionized atomic species from the substrate in the direction of the target electrode.

Abstract: The disclosed embodiments relate to ion delivery mechanisms, e.g., for fusion power. Particularly, some embodiments relate to systems and methods for delivering ions to a fuel source in such a manner to initiate fast ignition. The ions may be accumulated into “microbunches” and delivered to the fuel with considerable energy and velocity. The impact may compress the fuel while delivering sufficient energy to begin the fusion reaction.

Abstract: A neutron generator and isotope production apparatus and method of using the same to produce commercially and medically useful neutrons. The gamma,n reaction produces neutrons in beryllium and deuterium and the spectrum of the neutrons generated is shaped to optimize capture of the neutrons in a gamma emitting isotope. The gammas interact with target materials to produce large quantities of neutrons.

Abstract: The invention provides methods and apparatus for extracting ions, and further for producing neutrons from the extracted ions. In an aspect, there is provided a method for extracting ions involving the following step: in a vacuum chamber applying voltages to a spark gap between two electrodes comprising coatings of a hydrocarbon, each voltage sufficient to trigger a spark discharge in the gap sufficient to dissociate the hydrocarbon and extract therefrom hydrogen ions, wherein the hydrocarbon is a nonvolatile liquid sufficiently non-viscous to flow and re-coat holes in the coatings between each spark discharge.

Abstract: A target is provided herein such that the radioactivation of a member thereof due to protons may be reduced. In order to reduce the radioactivation of the member due to protons, a novel target composed by compositing a beryllium material (or lithium material) and a nonmetal material is used.

Abstract: A method is provided for producing neutrons, comprising: providing a converter foil comprising deuterium clusters; focusing a laser on the foil with power and energy sufficient to cause deuteron ions to separate from the foil; and striking a surface of a target with the deuteron ions from the converter foil with energy sufficient to cause neutron production by a reaction selected from the group consisting of D-D fusion, D-T fusion, D-metal nuclear spallation, and p-metal. A further method is provided for assembling a plurality of target assemblies for a target injector to be used in the previously mentioned manner. A further method is provided for producing neutrons, comprising: splitting a laser beam into a first beam and a second beam; striking a first surface of a target with the first beam, and an opposite second surface of the target with the second beam with energy sufficient to cause neutron production.

Abstract: A dense plasma focus (DPF) to produce positron emitters is provided, where a pulsed device has an anode and a cathode arranged in a vacuum chamber, the anode and cathode being subjected to a high voltage. When the vacuum chamber is filled with a reaction gas and a high voltage generated is applied, a plasma sheath is created and a reaction between the electrodes take place to produce plasmoids resulting in an ion beam that interacts with a reactive gas to produce radio-isotopes.

Abstract: The present invention provides a target capable of reducing radioactivation of a member due to protons. The present invention uses a novel target configured by compositing a beryllium material or a lithium material and a carbon-series material for reducing the radioactivation of the member due to the protons.

Abstract: A method is provided for producing neutrons, comprising: providing a converter foil comprising deuterium clusters; focusing a laser on the foil with power and energy sufficient to cause deuteron ions to separate from the foil; and striking a surface of a target with the deuteron ions from the converter foil with energy sufficient to cause neutron production by a reaction selected from the group consisting of D-D fusion, D-T fusion, D-metal nuclear spallation, and p-metal. A further method is provided for assembling a plurality of target assemblies for a target injector to be used in the previously mentioned manner. A further method is provided for producing neutrons, comprising: splitting a laser beam into a first beam and a second beam; striking a first surface of a target with the first beam, and an opposite second surface of the target with the second beam with energy sufficient to cause neutron production.

Abstract: A method and apparatus for producing heat is disclosed. The method involves the steps of accelerating one or more first particle(s) to a first velocity; colliding the accelerated particle(s) with one or more second particles in a collision zone located within a housing causing the first particle(s) and second particle(s) to form one or more collision mass(es) containing subatomic particles of the first and second particles; controlling the position of the collision mass(es) with electric and/or magnetic fields; and introducing one or more further particle(s) into the collision mass(es), the further particle(s) undergoing nuclear fusion with the one or more particles in the collision mass(es) producing fusion products and releasing heat.

Abstract: A method of impacting liquid droplets onto a surface includes providing a series of liquid droplets, and directing the liquid droplets at a non-planar target surface to cause a shockwave in the droplets upon impact. An apparatus for impacting liquid droplets onto a surface includes a mechanism to produce a series of liquid droplets, and a mechanism to direct the liquid droplets at a non-planar target surface to cause a shockwave in the droplets upon impact. The non-planar target surface is shaped to intensify the shockwave in the droplets.

Abstract: According to one embodiment, an apparatus includes a pyroelectric crystal, a deuterated or tritiated target, an ion source, and a common support coupled to the pyroelectric crystal, the deuterated or tritiated target, and the ion source. In another embodiment, a method includes producing a voltage of negative polarity on a surface of a deuterated or tritiated target in response to a temperature change of a pyroelectric crystal, pulsing a deuterium ion source to produce a deuterium ion beam, accelerating the deuterium ion beam to the deuterated or tritiated target to produce a neutron beam, and directing the ion beam onto the deuterated or tritiated target to make neutrons using a voltage of the pyroelectric crystal and/or an HGI surrounding the pyroelectric crystal. The directionality of the neutron beam is controlled by changing the accelerating voltage of the system. Other apparatuses and methods are presented as well.

Abstract: A generally concentric sealed reactor vessel defining a volume. A concentric target electrode 12 centered within a nonconductive vessel 24. This vessel is suspended in insulating and cooling medium 242 composed of transformer oil. Deuterium gas 235 is contained within the volume at a predetermined pressure. High voltage, high frequency potential 130 is connected between the target electrode and Earth ground 153, creating an alternating electrical field within the reaction chamber. This electric field is of sufficient intensity ionize the contained gases, and result in the alternately radial outward acceleration and alternately radial inward acceleration of these ionized gases. On inward acceleration the ions impact the target and with one another at fusion reactive velocities causing fusion reactions. In the second embodiment the reactor vessel is a conductive material connected to the power supply and the defined volume is free of tangible structure.

Abstract: Systems, methods, and devices with improved electrode configuration for downhole nuclear radiation generators are provided. For example, one embodiment of a nuclear radiation generator capable of downhole operation may include a charged particle source, a target material, and an acceleration column between the charged particle source and the target material. The acceleration column may include an intermediate electrode that remains floating at a variable potential, being electrically isolated from the rest of the acceleration column.

Abstract: A cyclotron that includes a magnet yoke that has a yoke body that surrounds an acceleration chamber and a magnet assembly. The magnet assembly is configured to produce magnetic fields to direct charged particles along a desired path. The magnet assembly is located in the acceleration chamber. The magnetic fields propagate through the acceleration chamber and within the magnet yoke. A portion of the magnetic fields escape outside of the magnet yoke as stray fields. The magnet yoke is dimensioned such that the stray fields do not exceed 5 Gauss at a distance of 1 meter from an exterior boundary.

Abstract: In FIG. 1 3CRC. A generally spherical sealed reactor vessel defining a volume. A target sphere shaped electrode 11 is centered within a nonconductive reactor vessel 21. The target sphere is insulated from and fixedly centered within the nonconductive reactor vessel by an insulated stalk 22. This vessel is suspended in an insulating and cooling medium 241 composed of transformer oil. Deuterium gas 235 is released into and contained within the volume at a predetermined pressure. A source of high voltage, high frequency potential 130 is connected to the target electrode by an electrical connection 13. The other terminal of the high voltage, high frequency potential source is connected to Earth ground 153. The applied alternating electrical potential creates an alternating electrical field within the reaction chamber. This an oscillating electric field is formed within the enclosed space of nonconductive reactor vessel 21, extending between target electrode 11 and heat absorbent container 238.

Abstract: A neutron generator and isotope production apparatus and method of using the same to produce commercially and medically useful neutrons. The gamma,n reaction produces neutrons in beryllium and deuterium and the spectrum of the neutrons generated is shaped to optimize capture of the neutrons in a gamma emitting isotope. The gammas interact with target materials to produce large quantities of neutrons.

Abstract: A method for producing heavy electrons is based on a material system that includes an electrically-conductive material is selected. The material system has a resonant frequency associated therewith for a given operational environment. A structure is formed that includes a non-electrically-conductive material and the material system. The structure incorporates the electrically-conductive material at least at a surface thereof. The geometry of the structure supports propagation of surface plasmon polaritons at a selected frequency that is approximately equal to the resonant frequency of the material system. As a result, heavy electrons are produced at the electrically-conductive material as the surface plasmon polaritons propagate along the structure.

Abstract: A man made method, utilizing particles bombardment technique, is used to produce Silver. The particles bombardment technique uses particle accelerator to accelerate Boron particles to high speed. These high speed Boron particles contain high energy. These high energy Boron particles are used to bombard Molybdenum elements. Then elements Boron and Molybdenum undergo cold fusion process that they are combined to produce Silver.

Abstract: By firing ionized reactant particles into a solid block of reactant, fusion reactions occur. As these particles are fired longitudinally into a thin sheet of reactant, fusion products are ejected laterally into a series of charged collectors. Unfused reactant ions that prematurely exit the solid reactant are recirculated by electric fields within the invention, boosting efficiency. Through the use of several collectors, charged particles of many energies are efficiently collected and converted to electric potential. The use of a solid sheet of reactant greatly increases the probability of fusion events taking place. The shape of the sheet acts to isolate the incoming reactant ions from the outgoing fusion products. Fusion products are not generally converted to heat by virtue of the small amount of material present in a typical product trajectory. Singly and together, these improvements act to greatly increase the efficiency of the reactor over prior art.

Abstract: A neutral particle generator is disclosed that includes a container which holds a material in at least a partial plasma state, for example a Deuterium plasma. In one form, a first cathode is positioned within the container and produces a first beam of neutral particles directed away from the first cathode. Optionally, a second cathode is also positioned within the container and produces a second beam of neutral particles directed away from the second cathode, and/or a target is also positioned within the container. In one form, the first cathode and the second cathode are linearly opposed so that the first beam interacts/collides with the second beam resulting in fusion reactions of at least some of the neutral particles, which thereby results in generation of emitted neutrons.

Abstract: A neutron generator includes a sealed envelope providing a low pressure environment for a gas. One end of the envelope defines an ion source chamber. A target electrode is disposed at the other end of the envelope. An extracting electrode is spaced apart from the target electrode by an accelerating gap. The extracting electrode bounds the ion source chamber. A dispenser cathode electrode and grid electrode are disposed in the ion source chamber for inducing ionization in the ion source chamber. The dispenser cathode electrode, the grid electrode and the extracting electrode operate at a positive high voltage potential and the target electrode operates at or near ground potential. This configuration provides an electric field gradient that accelerates ions towards the target electrode to induce collisions of ions with target material, thereby causing fusion reactions that generate neutrons. High voltage power supply circuit means supplies a positive high voltage signal to the electrodes of the ion source.

Abstract: A neutron generator includes an ion source disposed in a pressurized environment containing an ionizable gas. The ion source includes a substrate with a bundle of carbon nanotubes extending therefrom. The ends of the nanotubes are spaced from a grid. Ion source voltage supply circuitry supplies a positive voltage potential between the substrate and the grid of the ion source to cause ionization of the ionizable gas and emission of ions through the grid. An ion accelerator section is disposed between the ion source and a target. The ion accelerator section accelerates ions that pass through the grid towards the target such that collisions of the ions with the target cause the target to generate and emit neutrons therefrom. The ion source, accelerator section and target are housed in a sealed tube and preferably the carbon nanotubes of the bundle are highly ordered with at least 106 carbon nanotubes per cm2 that extend in a direction substantially parallel to the central axis of the tube.

Abstract: A neutron generator and method of constructing the same. The generator includes a grid configured to produce an ionizable gas when heated by electrons impinging thereon. A cathode emits electrons to heat the grid and to collide with produced ionizable gas atoms to generate ions. Neutrons are generated from a collision of ions impinging on a target in the generator. A tool for subsurface use incorporating the neutron generator.

Abstract: An apparatus for the generation of neutron/gamma rays is described including a chamber which defines an ion source, said apparatus including an RF antenna positioned outside of or within the chamber. Positioned within the chamber is a target material. One or more sets of confining magnets are also provided to create a cross B magnetic field directly above the target. To generate neutrons/gamma rays, the appropriate source gas is first introduced into the chamber, the RF antenna energized and a plasma formed. A series of high voltage pulses are then applied to the target. A plasma sheath, which serves as an accelerating gap, is formed upon application of the high voltage pulse to the target. Depending upon the selected combination of source gas and target material, either neutrons or gamma rays are generated, which may be used for cargo inspection, and the like.

Abstract: Radionuclides are produced with a pulsed neutron flux from a multiple repetition rate staged Z-pinch machine, the pulsed neutron flux is moderated, an activatable radionuclide precursor is exposed to the moderated pulsed neutron flux, and a corresponding radionuclide from the activatable radionuclide precursor is produced. High current pulses are passed through a target plasma of fusible material enclosed in a cylindrical liner plasma composed of a high-Z plasma to generate a magnetic field that compresses the liner plasma, and generates shock waves. The shock implodes the target plasma. The shock front propagates between an outer shock front and an axis of the target plasma so it is heated through shock dissipation and by adiabatic compression due to an imploding shock front produced in the outer liner plasma to fuse light nuclei and generate alpha particles and neutrons. Alpha particles trapped within the magnetic field further heat the target plasma.

Abstract: To generate neutrons, a nuclei fusible material is placed between opposed anvils of a mechanical pressing device. Force is applied to an anvil face to compress the fusible material to a high pressure. A laser light pulse is then directed through the anvil face and into the compressed fusible material. This laser light pulse is focused by an optical system to a focal spot in the compressed fusible material, to cause a small portion of the compressed fusible material at the focal spot to be further locally compressed and heated to a temperature whereby a micro plasma is formed in which fusing of nuclei takes place. This fusion reaction of the nuclei in the fusible material thus generates neutrons. In a preferred embodiment, the mechanical pressing device is a diamond anvil, and the fusible material is one of deuterium, tritium, or a combination thereof.

Abstract: A neutron generating apparatus includes an ion generating device. The ion generating device includes an ion generating tube to which deuterium gas or tritium gas is supplied, a magnet arranged outside of the ion generating tube for generating a magnetic field in the ion generating tube, a plasma generating antenna arranged outside of the ion generating tube for generating an electric field in the ion generating tube, and an RF power source that supplies high frequency power to the plasma generating antenna. The RF power source supplies the high frequency power to the plasma generating antenna by controlling the pulse thereof so that an unsteady state of plasma is generated repetitively in the ion generating tube.

Abstract: A non-radio-isotopic radiological source using a dense plasma focus (DPF) to produce an intense z-pinch plasma from a gas, such as helium, and which accelerates charged particles, such as generated from the gas or injected from an external source, into a target positioned along an acceleration axis and of a type known to emit ionizing radiation when impinged by the type of accelerated charged particles. In a preferred embodiment, helium gas is used to produce a DPF-accelerated He2+ ion beam to a beryllium target, to produce neutron emission having a similar energy spectra as a radio-isotopic AmBe neutron source. Furthermore, multiple DPFs may be stacked to provide staged acceleration of charged particles for enhancing energy, tenability, and control of the source.

Abstract: An apparatus and method for a beam target fusion neutron generator comprising a closed cycle flow generator having a continuous liquid phase flowing stream liquid target containing hydrogen isotopes where said stream has a continuously refreshed exposed surface and where said liquid target is high vacuum compatible at cryogenic temperatures; and an ion beam generator adapted to produce an ion beam and focused to direct said beam to bombard said flowing stream liquid target. The flowing stream liquid target can be a thin film curtain and said closed cycle flow generator can be a cryogenic liquid handling system having a heat exchanger adapted to maintain said liquid target at cryogenic temperatures and having a collection reservoir position to capture use target material for recycling.