A charged particle transport system and its installation method, both of which can readily and quickly adjust alignment, are provided. The charged particle transport system 10a includes: a frame 16 fixed to a base 15; a first plate 21 joined to an upper portion of the frame 16 with a height-adjustable first screw 11; a second plate 22 movably accommodated in a horizontal surface of the first plate; a second screw 12 screwed into a screw hole formed in a fixing member 25 around the first plate 21 such that its tip abuts on an outer peripheral surface of the second plate 22; a third screw 13 that fixes the second plate 21 to the first plate 21; and first engagement pins 31 inserted into respective engagement holes 17a, 17b formed in the second plate 22 and a supporting member 27 for engaging both.

A set of magnetic elements is used in the beamline of a charged particle-based radiation therapy machine instead of scattering foils. The set of magnetic elements is located between the exit of the linear accelerator and the isocenter or patient, and is used for shaping and defocusing a charged particle beam used for charged particle-based treatment modalities.

One or more embodiments of a device for generating a magnetic field. The device may include a chamber and a first magnetic field generator. The magnetic field generator may include a plurality of solenoid capsules. Each of the solenoid capsules may include a shell and a solenoid. Each shell may encapsulate the respective solenoid of the solenoid capsule of the shell. The first magnetic field generator may encircle a first portion of the chamber.

A synchrocyclotron for extracting charged particles accelerated to an extraction energy includes a magnetic unit comprising N valley sectors and N hill sectors, and configured for creating z-component of a main magnetic characterized by a radial tune of the successive orbits. The synchrocyclotron includes a first instability coil unit and a second instability coil unit configured for creating a field bump of amplitude increasing radially. The amplitude of the field bump may be varied to reach the value of the offset amplitude at the average instability onset radius. The offset amplitude may be the minimal amplitude of the field bump at the average instability onset radius required for sufficiently offsetting the center of the orbit of average instability onset radius to generate a resonance instability to extract the beam of charged particle at the average instability onset radius.

An example method includes: receiving, from a treatment planning process, information that is based on a dose distribution for an irradiation target; and performing at least one of the following operations: moving structures to trim spots of a particle beam so that the spots of the particle beam approximate pre-trimmed spots for which characteristics are obtained based on the information received; moving structures to produce a trimming curve for a layer of an irradiation target based on a specification of a trimming curve for the layer included in the information received; moving structures to produce a single trimming curve for all radiation fields of an irradiation target based on specifications of the single trimming curve included in the information received; or moving structures based on configuration information for the structures in the information received.

A device for concentrating ionizing radiation fluence is disclosed having a coupling structure linking the external radiotherapy device with linear accelerator to an external structure, whose central axis is hollow with an input window through which electrons enter attaching to the rotation device; a rotation system linking the coupling structure with a coupling flange rotating an inner structure; a deflection system in the inner structure, wherein the deflection system has first and second magnetic deflection devices; a system for controlling the focal point, which is in the electron deflection system, having an electronic control system controlling a set of motors that produce coordinated movements of the second magnetic deflection device, a correction element and a collimator, which change the position of the focal point; and at least two laser diodes on the edge of the collimator (25) pointing towards the focal point determining the position of the electron beam generated.

A synchrocyclotron for extracting charged particles accelerated to an extraction energy includes a magnetic unit comprising N valley sectors and N hill sectors, and configured for creating z-component of a main magnetic characterized by a radial tune of the successive orbits. The synchrocyclotron includes a first instability coil unit and a second instability coil unit configured for creating a field bump of amplitude increasing radially. The amplitude of the field bump may be varied to reach the value of the offset amplitude at the average instability onset radius. The offset amplitude may be the minimal amplitude of the field bump at the average instability onset radius required for sufficiently offsetting the center of the orbit of average instability onset radius to generate a resonance instability to extract the beam of charged particle at the average instability onset radius.

A charged particle transport system and its installation method, both of which can readily and quickly adjust alignment, are provided.

The charged particle transport system 10a includes: a frame 16 fixed to a base 15; a first plate 21 joined to an upper portion of the frame 16 with a height-adjustable first screw 11; a second plate 22 movably accommodated in a horizontal surface of the first plate; a second screw 12 screwed into a screw hole formed in a fixing member 25 around the first plate 21 such that its tip abuts on an outer peripheral surface of the second plate 22; a third screw 13 that fixes the second plate 21 to the first plate 21; and first engagement pins 31 inserted into respective engagement holes 17a, 17b formed in the second plate 22 and a supporting member 27 for engaging both.

A linear accelerator comprises a plurality of cyclotrons arranged axially in a cyclotron stack, each cyclotron having a set of dees and a central aperture passing through the set of dees. Each central aperture is axially aligned with one another in the stack, forming a central channel having an inlet and an outlet that passes through the stack. Magnets are positioned so as to generate a magnetic field perpendicular to the set of dees. A power supply applies an oscillating voltage to each set of dees of the stack. In operation, subatomic particles are ejected radially outwardly of the stack, creating a dead zone within the central channel that is void of particles and electromagnetic fields. A mass or light beam is accelerated as it passes through the central channel's dead zone, due to the absence of frictional forces acting on the mass or light within the dead zone.

The invention provides a charged particle irradiation apparatus including: a focusing magnet that deflects a charged particle beam to continuously change an irradiation angle of the beam to an isocenter; an irradiation nozzle that continuously moves along a shape on an exit side of an effective magnetic field region of the focusing magnet, wherein the beam exiting the focusing magnet is emitted to the isocenter through the irradiation nozzle; a power supply rail along the shape on the exit side of the region; and a collector shoe fixed to the irradiation nozzle and configured to slide along the rail to supply power from the rail to the irradiation nozzle. A surface of the collector shoe contacted with the rail has the same bend radius as or average bend radius of the rail, and/or the collector shoe slides along the rail in contact with a flat side surface of the rail.