48results about How to "Improve beam quality" patented technology

The invention relates to the fields of radioactive nuclear beam physics, heavy ion beam therapy of tumors, heavy ion irradiation materials and heavy ion irradiation breeding. A position-sensitive detector for high-energy heavy ion beam diagnosis, its main feature is that a beam probe is provided in a gas-sealed cavity, and the beam probe is fixedly connected to the fixed bracket of the port sealing flange assembly; The gas-tight chamber includes an incident window on one side of the gas box, and an exit window on the other side; the beam probe consists of two sets of beam measurement units, and each set of beam measurement units consists of a high-voltage pole, an insulating backing plate The port sealing flange assembly is composed of a fixed bracket and a port sealing flange; the multi-channel signal lead-out adapter board includes a multi-channel signal lead-out board and a multi-channel signal adapter board; the multi-channel signal adapter board One end is provided with a contact end inserted into the sealing port of the sealing flange to connect with the signal output end of the multi-channel signal lead-out board, and the other end is provided with a multi-core connector which is the signal output port of the beamline position sensitive detector, and the multi-channel signal lead-out board The signal input end of the sensor is connected to the signal pole of the beam probe.

A proton therapy system based on a compact superconducting cyclotron, including: a superconducting cyclotron system, an energy selection system, a beam transport system, a fixed therapy room subsystem and a rotating frame therapy subsystem; a fixed-energy proton beam extracted from a superconducting cyclotron of the superconducting cyclotron system is adjusted into a continuous and adjustable proton beam of 70 MeV to 200 MeV by the energy selection system, thus realizing a longitudinal adjustment for a proton range during treating a tumor, and the continuous and adjustable proton beam is respectively transmitted to the fixed therapy room subsystem and the rotating frame therapy subsystem by the beam transport system. The cooperative control of the superconducting cyclotron system, the energy selection system, the beam transport system and the therapy head realizes the transverse expansion of proton beams, thus realizing intensity modulated radiation therapy for the tumor.

The invention relates to an ion acceleration apparatus and belongs to the nuclear energy technology field. A high-frequency electric-focusing high-gradient ion acceleration apparatus is mainly characterized in that the high-gradient ion acceleration apparatus comprises four mutually-vertical T-shaped plates arranged in a vacuum cavity cylinder, a plurality of drift tubes are fixedly connected between the two T-shaped plates respectively by drift-tube support bars, the plurality of drift tubes and the vacuum cavity cylinder are on a same central line, vertical high-frequency electric quadrupole lenses are oppositely mounted between the drift tubes and are fixedly connected between the vertical T-shaped plates, and horizontal high-frequency electric quadrupole lenses are oppositely mounted between the drift tubes and are fixedly connected with the two horizontal T-shaped plates. The advantages of the apparatus provided by the invention in acceleration of high-intensity ion beams, a structure is compact, so that beam quality is excellent; an acceleration function and a transverse and longitudinal focusing function are combined in the same high frequency structure, cavity shunt impedance is high and high-frequency power consumption is greatly reduced; and zero phase is utilized to accelerate, acceleration efficiency is relatively high, length of the cavity can be effectively reduced and effective acceleration gradient is raised. The ion acceleration apparatus provided by the invention is mainly used for acceleration of high-intensity low-energy ion beams and can be used for application-type acceleration apparatuses such as injectors of high-intensity accelerators, industrial accelerators and treatment apparatus injectors.

The invention provides an irradiation device capable of producing a series of single-energy γ, which belongs to the technical field of nuclear technology application; the device includes a source storage well, a collimation diaphragm, a plurality of radiation sources, a scattering target, a scattering trap, a shutter and a shielding body. The invention improves the intensity of the radiation field, the radiation quality (good energy uniformity) and the economy of the device, and realizes the fixing of the detector, so that the precise experiment is feasible.

The invention discloses a method for measuring accelerator mass spectrometry using super halogen anions of beryllium, which is characterized in that it comprises the following steps: preparing BeF capable of producing super halogen anions 3 - target sample; bombardment target sample with PbF 2 Powder mixing target cone produces BeF 3 - beam current; BeF 3 - The beam is crushed in the tandem accelerator; after passing through the main analysis magnet 9 be 2+ into the removable Faraday cup for measurement, 10 be 2+ passing along the main beamline; 10 be 2+ Directly through the main electrostatic analyzer and the second magnet at the high energy end, and finally into the gas detector for analysis. The benefit of the present invention is that: with BeF 3 - as 10 The extraction beam measured by Be-AMS effectively suppresses the 10 The interference of B makes it unnecessary to use the energy-reducing film for secondary stripping at the high-energy end of the small AMS, resulting in 10 The transmission efficiency of the Be beam is guaranteed (up to 100% transmission at the high-energy end), and the original good beam quality is maintained without the membrane; it effectively avoids the high toxicity of BeO as airborne dust to the experimenters. risks of.

The invention relates to a hybrid accelerating focusing super-conduction cavity. Four liquid helium cooling grooves are formed in a super-conduction resonant cavity cylinder and are in parallel to one another, two opposite liquid helium cooling grooves are communicated by a plurality of conical cylinders, a circular ring-shaped accelerating tube is arranged between two conical cylinders, the central lines of the plurality of accelerating tubes and the central line of the super-conduction resonant cylinders are in the same central line, four focusing box are arranged among the accelerating tubes, are perpendicular to one another and are symmetrically fixed on the liquid helium cooling grooves, the conical cylinders communicates with the liquid helium cooling grooves, and liquid helium in the conical cylinders communicates with liquid helium in the liquid helium cooling grooves. The hybrid accelerating focusing super-conduction cavity has the advantages that the hybrid accelerating focusing super-conduction cavity is in a super-conduction state when working in a low-temperature state, the resistance is small, and the high-frequency loss is small; the beam acceleration function and the beam focusing function are combined in the same high-frequency structure, the structure is compact, and the beam quality is excellent; and the length of an accelerator is effectively reduced, and the construction cost of the accelerator is reduced.

The invention discloses a broad beam uniformity adjusting device of an ion implanter. The broad beam uniformity adjusting device aims to solve the problem that the broad beam uniformity is difficult to control. The broad beam uniformity adjusting device comprises a multi-filament ion source, a multi-slit extraction electrode plate, a vertical mass analyzer, an analysis diaphragm, a beam blocking diaphragm, a substrate and a fixed Faraday array; plasmas are extracted and fed into the vertical mass analyzer by the multi-slit extraction electrode plate and are fed into the analysis diaphragm after being sorted by the vertical mass analyzer, the analysis diaphragm is provided with a plurality of analysis slits, the beam blocking diaphragm is arranged at an outlet of the analysis diaphragm, and broad ion beams are completely fed into a Faraday body of the fixed Faraday array by the aid of the fixed Faraday array; the substrate which horizontally reciprocates is positioned between the beam blocking diaphragm and the fixed Faraday array. The broad beam uniformity adjusting device has the advantages that light paths are simple in structure, broad beam uniformity adjustment operation is simple and convenient, and the broad beam uniformity adjusting device is high in reliability and can be used on low-temperature polycrystalline OLED (organic light emitting diode) device production lines.

The invention belongs to the field of high-power microwave technology, and discloses a method for reducing the radial oscillation phase difference of electron beams. The method is based on improving the consistency of the initial phase of electrons emitted by cold cathode explosions, and partly solves the problem of explosive emission under low guiding magnetic field conditions. Radial oscillation problem caused by electron velocity dispersion. The method for reducing the radial oscillation phase difference of the electron beam can be realized by loading a non-uniform magnetic field near the cold cathode explosion emission surface. The loading of the non-uniform magnetic field can adjust the configuration of the guiding magnetic field near the surface of the cold cathode, improve the consistency of the emission direction and movement path of the emitted electrons, and further suppress the radial violent oscillation caused by the velocity dispersion between the electrons. Applying this technology to the development of low-guiding magnetic field high-power microwave generator devices can improve the beam quality of the explosively emitted electron beam and improve the working efficiency and reliability of the high-power microwave generator.