47 results about "Neutral beam injection" patented technology

A negative ion-based neutral beam injector comprising a negative ion source, accelerator and neutralizer to produce about a 5 MW neutral beam with energy of about 0.50 to 1.0 MeV. The ions produced by the ion source are pre-accelerated before injection into a high energy accelerator by an electrostatic multi-aperture grid pre-accelerator, which is used to extract ion beams from the plasma and accelerate to some fraction of the required beam energy. The beam from the ion source passes through a pair of deflecting magnets, which enable the beam to shift off axis before entering the high energy accelerator. After acceleration to full energy, the beam enters the neutralizer where it is partially converted into a neutral beam. The remaining ion species are separated by a magnet and directed into electrostatic energy converters. The neutral beam passes through a gate valve and enters a plasma chamber.

A high performance field reversed configuration (FRC) system includes a central confinement vessel, two diametrically opposed reversed-field-theta-pinch formation sections coupled to the vessel, and two divertor chambers coupled to the formation sections. A magnetic system includes quasi-dc coils axially positioned along the FRC system components, quasi-dc mirror coils between the confinement chamber and the formation sections, and mirror plugs between the formation sections and the divertors. The formation sections include modular pulsed power formation systems enabling static and dynamic formation and acceleration of the FRCs. The FRC system further includes neutral atom beam injectors, pellet injectors, gettering systems, axial plasma guns and flux surface biasing electrodes. The beam injectors are preferably angled toward the midplane of the chamber. In operation, FRC plasma parameters including plasma thermal energy, total particle numbers, radius and trapped magnetic flux, are sustainable at or about a constant value without decay during neutral beam injection.

A high performance field reversed configuration (FRC) system includes a central confinement vessel, two diametrically opposed reversed-field-theta-pinch formation sections coupled to the vessel, and two divertor chambers coupled to the formation sections. A magnetic system includes quasi-dc coils axially positioned along the FRC system components, quasi-dc mirror coils between the confinement chamber and the formation sections, and mirror plugs between the formation sections and the divertors. The formation sections include modular pulsed power formation systems enabling static and dynamic formation and acceleration of the FRCs. The FRC system further includes neutral atom beam injectors, pellet or CT injectors, gettering systems, axial plasma guns and flux surface biasing electrodes. The beam injectors are preferably angled toward the midplane of the chamber. In operation, FRC plasma parameters including plasma thermal energy, total particle numbers, radius and trapped magnetic flux, are sustainable at or about a constant value without decay during neutral beam injection.

A non-resonance photo-neutralizer for negative ion-based neutral beam injectors. The non-resonance photo-neutralizer utilizes a nonresonant photon accumulation, wherein the path of a photon becomes tangled and trapped in a certain space region, i.e., the photon trap. The trap is preferably formed by two smooth mirror surfaces facing each other with at least one of the mirrors being concave. In its simplest form, the trap is elliptical. A confinement region is a region near a family of normals, which are common to both mirror surfaces. The photons with a sufficiently small angle of deviation from the nearest common normal are confined. Depending on specific conditions, the shape of the mirror surface may be one of spherical, elliptical, cylindrical, or toroidal geometry, or a combination thereof.

The invention discloses a neutral beam injection high voltage power supply output mechanical protection switch which comprises motors, a metal connecting rod, a metal shorting bar, relays, an epoxy board, an epoxy rod, a metal terminal strip, a positive and negative connecting wire metal terminal, wherein the metal connecting rod and the metal shorting bar are moving parts of the switch, and are connected with driving motors through the connection of the epoxy rod; the two independent driving motors control the opening and closing of the moving parts through insulating bars; and the control signals of the two motors are provided by the two independent relays. The short-circuiting and disconnection operations of a short-circuiting switch on the output end of a high voltage power supply are realized through the second motor, and the closing and disconnection operations of the short-circuiting switch on the output of the high voltage power supply and an electrical connection switch of a neutral beam injection system are realized through the first motor; the voltage class of the electrical isolation between the both achieves 100kV through the motors and the insulating bar of the moving parts of the switch; and two functions of electrical isolation switch and short-circuiting switch are combined integrally, so that the switch is convenient to control, and the efficiency of experiments and debugging is improved.

Systems and methods that facilitate forming and maintaining FRCs with superior stability as well as particle, energy and flux confinement and, more particularly, systems and methods that facilitate forming and maintaining FRCs with elevated system energies and improved sustainment utilizing neutral beam injection and high harmonic fast wave electron heating.

A high performance field reversed configuration (FRC) system includes a central confinement vessel, two diametrically opposed reversed-field-theta-pinch formation sections coupled to the vessel, and two divertor chambers coupled to the formation sections. A magnetic system includes quasi-dc coils axially positioned along the FRC system components, quasi-dc mirror coils between the confinement chamber and the formation sections, and mirror plugs between the formation sections and the divertors. The formation sections include modular pulsed power formation systems enabling static and dynamic formation and acceleration of the FRCs. The FRC system further includes neutral atom beam injectors, pellet or CT injectors, gettering systems, axial plasma guns and flux surface biasing electrodes. The beam injectors are preferably angled toward the midplane of the chamber. In operation, FRC plasma parameters including plasma thermal energy, total particle numbers, radius and trapped magnetic flux, are sustainable at or about a constant value without decay during neutral beam injection.

The invention relates to the technical field of high-power high-current ion source and neutral beam injection heating, and particularly relates to a long-pulse high-power ion source electrode grid cooling water circuit and vacuum sealing structure. The structure is formed by assembling multiple layers of water-cooled electrode grids and a support flange thereof in parallel. Each layer of water-cooled electrode plate is composed of two water-cooled electrode grids of the same structure lapped together. The structure further comprises cooling water circuits inside the support flange and cooling water circuits inside the water-cooled electrode grids. By using the structure, electrodes can be cooled instantaneously, and the uniformity of electric field distribution between electrode grid plates is ensured. Moreover, a water pipe connecting the electrodes and the flange is omitted, a connecting structure of the water pipe and the electrodes is omitted, space is saved, the size of the flange and the overall vacuum cavity including an insulating cavity is reduced, and the processing cost is lowered. The technical scheme is especially suitable for a compact ion source first electrode water circuit structure.