The present invention discloses a compact integrated deuterium-deuterium (D-D) neutron generator. A hemispherical metal head is disposed inside a cylindrical ceramic shell of the generator and is provided therein with an ion source and an ion source power supply. An inner ceramic insulated cylinder and an outer ceramic insulated cylinder are disposed between a metal plate of the metal head and a baseplate of the generator, and an isolated power supply system and a high-voltage power supply are disposed between the inner ceramic insulated cylinder and the outer ceramic insulated cylinder. A rear end of an extraction accelerating electrode disposed inside the inner ceramic insulated cylinder protrudes from the generator and is then connected to a target holder disposed outside the baseplate. A target is disposed inside the target holder, the target is at ground potential, and a cooling water interface is disposed on the target holder.

System includes a particle accelerator configured to direct a particle beam of charged particles along a designated path. The system also includes an extraction device positioned downstream from the particle accelerator. The extraction device includes a stripper foil and a foil holder that holds the stripper foil. The foil holder is configured to position the stripper foil across the designated path of the particle beam such that the particle beam is incident thereon. The stripper foil is configured to remove electrons from the charged particles, wherein the stripper foil includes a backing layer and a conductive layer stacked with respect to one another. The backing layer includes synthetic diamond.

System includes a particle accelerator configured to direct a particle beam of charged particles along a designated path. The system also includes an extraction device positioned downstream from the particle accelerator. The extraction device includes a stripper foil and a foil holder that holds the stripper foil. The foil holder is configured to position the stripper foil across the designated path of the particle beam such that the particle beam is incident thereon. The stripper foil is configured to remove electrons from the charged particles, wherein the stripper foil includes a backing layer and a conductive layer stacked with respect to one another. The backing layer includes synthetic diamond.

An irradiation method and system for irradiating a target volume, the method comprising: providing thermal neutron absorbing nuclides (such as in the form of a high neutron cross-section agent) at the target volume; and producing neutrons by irradiating nuclei in or adjacent to the target volume with a beam of particles consisting of any one or more of protons, deuterons, tritons and heavy ions, thereby prompting production of the neutrons through non-elastic collisions between the atoms in the path of the beam (including the target) and the particles. The neutron absorbing nuclides absorb neutrons produced in the non-elastic collisions, thereby producing capture products or fragments that irradiate the target volume.

An irradiation method and system for irradiating a target volume, the method comprising: providing thermal neutron absorbing nuclides (such as in the form of a high neutron cross-section agent) at the target volume; and producing neutrons by irradiating nuclei in or adjacent to the target volume with a beam of particles consisting of any one or more of protons, deuterons, tritons and heavy ions, thereby prompting production of the neutrons through non-elastic collisions between the atoms in the path of the beam (including the target) and the particles. The neutron absorbing nuclides absorb neutrons produced in the non-elastic collisions, thereby producing capture products or fragments that irradiate the target volume.

An accelerator includes: a main magnetic field magnet that has a plurality of magnetic poles and excites the main magnetic field in a space interposed between the magnetic poles; a magnetic channel that extracts the ion beam from an inside of the main magnetic field magnet toward an outside of the main magnetic field magnet; a displacement unit that displaces the ion beam circulating in a main magnetic field region to an outer side of the main magnetic field region; and a disturbance magnetic field region that is provided in an outer peripheral portion of the main magnetic field region and excites a magnetic field which disturbs the ion beam displaced to the outer side and guides the ion beam to the magnetic channel, the magnetic channel including a predetermined mechanism that suppresses a magnetic field gradient generated radially inward in the circulating ion beam region.

An accelerator includes: a main magnetic field magnet that has a plurality of magnetic poles and excites the main magnetic field in a space interposed between the magnetic poles; a magnetic channel that extracts the ion beam from an inside of the main magnetic field magnet toward an outside of the main magnetic field magnet; a displacement unit that displaces the ion beam circulating in a main magnetic field region to an outer side of the main magnetic field region; and a disturbance magnetic field region that is provided in an outer peripheral portion of the main magnetic field region and excites a magnetic field which disturbs the ion beam displaced to the outer side and guides the ion beam to the magnetic channel, the magnetic channel including a predetermined mechanism that suppresses a magnetic field gradient generated radially inward in the circulating ion beam region.

An electromagnetic field control member includes an insulating member constituted of a cylindrical ceramic and having a plurality of through holes along an axial direction, a conductive member constituted of metal and closing the through holes so as to provide an opening that opens in an outer periphery of the insulating member, and a power supply terminal connected to the conductive member. The power supply terminal is located away from an inner wall of the insulating member forming the through holes, and has a first end and a second end in the axial direction, and at least one of the first end and the second end is located farther away from the inner wall than a central portion of the power supply terminal.

Ion beams are efficiently extracted with an accelerator that includes a circular vacuum container including a pair of circular return yokes facing each other. Six magnetic poles are radially disposed from the injection electrode at the periphery thereof in the return yoke. Six recessions are disposed alternately with the respective magnetic poles in the circumferential direction of the return yoke. In the vacuum container, a concentric trajectory region, in which multiple beam turning trajectories centered around the injection electrode are present, is formed, and an eccentric trajectory region, in which multiple beam turning trajectories eccentric from the injection electrode are present, is formed around the region. In the eccentric trajectory region, the beam turning trajectories are dense between the injection electrode and the inlet of the beam extraction path. Gaps between the beam turning trajectories are wide in a direction 180 opposite to the inlet of the beam extraction path.

Ion beams are efficiently extracted with an accelerator that includes a circular vacuum container including a pair of circular return yokes facing each other. Six magnetic poles are radially disposed from the injection electrode at the periphery thereof in the return yoke. Six recessions are disposed alternately with the respective magnetic poles in the circumferential direction of the return yoke. In the vacuum container, a concentric trajectory region, in which multiple beam turning trajectories centered around the injection electrode are present, is formed, and an eccentric trajectory region, in which multiple beam turning trajectories eccentric from the injection electrode are present, is formed around the region. In the eccentric trajectory region, the beam turning trajectories are dense between the injection electrode and the inlet of the beam extraction path. Gaps between the beam turning trajectories are wide in a direction 180 opposite to the inlet of the beam extraction path.