To provide a superconducting magnet device enabling improved access to internal equipment. A superconducting magnet device includes: a superconducting coil; and a hollow tubular cryostat having an outer peripheral wall and an inner peripheral wall connected to each other so as to define a vacuum region where the superconducting coil is disposed. The cryostat has a tubular partition wall connecting the outer peripheral wall and the inner peripheral wall and a cavity partitioned from the vacuum region by the tubular partition wall is formed inside the tubular partition wall. The outer peripheral wall has an opening portion wide in the circumferential direction of the cryostat, and the opening portion communicates with the cryostat hollow portion radially inside the inner peripheral wall through the cavity.

A target carrier assembly includes a housing, a target, and a collimator. The housing includes a collimator compartment and a target compartment divided by a vacuum window foil, the collimator being removably disposed within the collimator compartment, and the target being disposed within the target compartment. The collimator compartment is attached to a cyclotron beam line in the irradiation position, and the target compartment is in fluid communication with a cooling fluid supply line and a cooling fluid return line in the irradiation position. The target is cooled by the cooling fluid from the cooling fluid supply line. The collimator directs a particle beam from the cyclotron beam line to irradiate the target and includes a beam entry diameter and a beam exit diameter. The collimator is in thermal contact with the collimator compartment.

Apparatuses and methods for accelerating electrons include an electron source configured to provide a beam of electrons and an accelerator that utilizes electron cyclotron resonance acceleration (eCRA). The accelerator includes a radio frequency (RF) cavity having a longitudinal axis, one or more inlets, and one or more outlets and a first electro-magnet substantially surrounding at least a portion of the cavity and configured to produce an axial magnetic field. The RF cavity is coupled to an RF source and configured to accelerate the beam of electrons axially entering the RF cavity with non-linear cyclotron resonance acceleration. A second electro-magnet located downstream of the one or more outlets of the RF cavity is configured to generate an inverse cusp in the axial magnetic field to manipulate the beam of electrons leaving the RF cavity from a helical orbit to a substantially linear path.

Apparatuses and methods for accelerating charged particles including a charged particle source configured to provide charged particles, an accelerator including: a cavity having one or more inlets and one or more outlets, an electro-magnet substantially surrounding at least a portion of the cavity, a conductor disposed longitudinally within the cavity configured to accelerate the charged particles entering the cavity through the one or more inlets via a radio frequency wave applied to the cavity, wherein the radio frequency wave operates in transverse electromagnetic mode, and a target configured to receive the accelerated charged particles via the one or more outlets.

In one embodiment of the invention, a method for irradiating a target is disclosed. A proton beam is generated using a cyclotron. A first information is provided to an energy selection system. An energy level for the protons is selected using an energy selection system based on the first information. The first information comprises a depth of said target. The proton beam is routed from the cyclotron through a beam transfer line to a scanning system. A second information is provided to the scanning system. The second information comprises a pair of transversal coordinates. The proton beam is guided to a location on the target determined by the second information using a magnet structure. The target is irradiated with the protons.

Disclosed is a high-frequency-tuning sliding electrical contact. The contact includes a tuning ring which is composed of an inner elastic piece, an upper base, an outer elastic piece and a lower base. Pull rods are welded to an upper side face of the upper base, and upper ends of the pull rods are driven to move up and down by a motor, so that the tuning ring slides up and down between the outer sleeve and the inner sleeve along the pull rods. The overall structure of the novel electrical contact is simple, compact and economical. The disclosure reduces joule heat produced by contact resistance and prevents contact surface fusion welding or conductive damage, and is especially suitable for tuning in a small gap range.

A charged particle beam treatment system includes a cyclotron that accelerates charged particles so as to emit a charged particle beam, an irradiation nozzle that irradiates a patient with the charged particle beam, a beam transport line along which the charged particle beam B emitted from the cyclotron is transported to the irradiation nozzle, profile monitors and that are provided in the beam transport line and detect a position of the beam, and steering electromagnets that are provided on an upstream side of the profile monitors, and adjust a position of the beam.

In various embodiments, a radiation therapy system can include a cyclotron that outputs a charged particle beam. In addition, the radiation therapy system can include an apparatus to receive the charged particle beam from the cyclotron. The apparatus decelerates or further accelerates the charged particle beam to produce a reduced or increased energy charged particle beam. The apparatus can include a radio frequency structure.

Disclosed is a beam energy dispersion adjusting mechanism for superconducting proton cyclotron. The adjusting mechanism includes a vacuum cavity, bases are symmetrically mounted on outer walls of four faces of the vacuum cavity in horizontal and vertical directions, an electric cylinder and a transmission mechanism are mounted on each of the four bases, a jaws block and a position fixing plate are correspondingly provided on an inner wall of the vacuum cavity at each face. The transmission mechanism includes an oil-free sleeve, a moving connecting rod onto which the position fixing plate is fixed, a corrugated pipe, and an electric cylinder connecting block whose both ends are screwed with the moving connecting rod and the electric cylinder, the jaws block is fixedly connected with the position fixing plate. The disclosure utilizes the electric cylinder to drive the jaws block to complete specified linear displacement, and satisfies back-end beam quality requirements.

Apparatuses and methods for accelerating electrons include a radio-frequency (RF) waveguide configured to couple an RF source to an accelerator that utilizes electron cyclotron resonance acceleration (eCRA). The RF waveguide includes a pair of parallel rectangular waveguides including a first waveguide and a second waveguide and a mode converter coupled to respective ends of the pair of parallel rectangular waveguides. The mode converter includes and outer body and two coaxial cylinders. An electron source is configured to provide a beam of electrons through an inner cylinder. An accelerator includes a RF cavity having a longitudinal axis, a cylindrical outer wall, an inlet, and an outlet and an electro-magnet surrounding the RF cavity and configured to produce an axial magnetic field. The mode converter is configured to excite a rotating TE-111 mode in the RF cavity.