76 results about "Quadrupole magnet" patented technology

An ion implantation apparatus with multiple operating modes is disclosed. The ion implantation apparatus has an ion source and an ion extraction means for forming a converging beam on AMU-non-dispersive plane therefrom. The ion implantation apparatus includes magnetic scanner prior to a magnetic analyzer for scanning the beam on the non-dispersive plane, the magnetic analyzer for selecting ions with specific mass-to-charge ratio to pass through a mass slit to project onto a substrate. A rectangular quadruple magnet is provided to collimate the scanned ion beam and fine corrections of the beam incident angles onto a target. A deceleration or acceleration system incorporating energy filtering is at downstream of the beam collimator. A two-dimensional mechanical scanning system for scanning the target is disclosed, in which a beam diagnostic means is built in.

The invention provides a continuous wave slow extraction synchronous accelerator. Multiple magnets used for synchronously accelerating heavy ions and/or protons comprise dipole magnets, quadrupole magnets and sextupole magnets, wherein the dipole magnets are used for turning of ion beam current, the quadrupole magnets are used for focusing of the ion beam current, and the sextupole magnets are used for matching of a phase space during slow extraction; each magnet is provided with at least one power unit electrically connected with the magnet, and each power unit comprises a voltage source andan energy storage capacitor; the voltage source is connected with the two ends of the energy storage capacitor and used for charging the energy storage capacitor; and multiple power units are connected in a series-parallel manner and then are electrically connected with the magnets and provide energy required in an ascent stage of a current waveform pulse for the magnets. By applying the continuous wave slow extraction synchronous accelerator provided by the invention, forward and reverse high pulsed power does not need to be extracted from a power grid, only forward constant power is needed,no interference is produced to the power grid, and power distribution capacity demand is reduced while beam current stability is improved.

An optical particle corrector with a straight optical axis for eliminating color and aperture aberrations in optical particle lenses includes multipole elements in the form of electric and/or magnetic quadrupole and octupole elements. There are at least twelve quadrupole elements and ten octupole elements, in which three quadrupole elements and two octupole elements are assembled into a group. These groups are arranged successively along the straight optical axis, in which a first symmetrical plane is defined between the first and second groups, a second symmetrical plane is defined between the second and third groups and a third symmetrical plane is defined between the third and fourth groups. The multipole elements from one group to another correspond to each other in pairs, in which the multipole elements of the corresponding following group are positioned in reverse order along the straight optical axis in comparison with the corresponding multipole elements of the preceding group. The structure and refractive powers of the multipole elements that correspond to each other are mirror-symmetrically configured relative to the corresponding symmetrical plane between the groups. At least two of the quadrupole elements generate electric-magnetic quadrupole fields, in which the quadrupole element are, preferably, arranged in a mirror-symmetrical manner relative to the second, or to all, symmetrical planes. An additional octupole element is arranged in the first and third symmetrical planes. The corrector enables the transmission of extremely large image fields, while the optical quality remains the same due to the fact image aberrations outside the axis can be corrected.

The invention relates to an operation method for eliminating a hysteresis effect influence of a synchronous accelerator. The operation method is used for solving the problem that the position and intensity of heavy ion beams in the synchronous accelerator under different energy conditions are inconsistent because a magnet has a hysteresis effect. The operation method of an accelerator in a magnetic field major cycle mode mainly comprises the following steps of: 1, determining the maximal energy value of a beam of the synchronous accelerator required for a tumor cell therapy; 2, calculating a power operation curve of a dipolar magnet, a quadrupole magnet and a sectupole magnet for controlling a beam track by using magnetism measuring parameters; 3, uploading an operation curve data packet of the magnets to a remote database connected with a power supply controller; 4, analyzing the data packet by the remote database and issuing data to corresponding control front-ends; and 5, trigging data by using a trigger to output the data to the power source of the related power supply and control the track of the heavy ion beam.

The invention discloses an enhanced learning method for calibrating the beam deviation of an accelerator. In an intermediate energy beam transmission section of the accelerator, the position of the beam deviates due to the influence of the installation accuracy of equipment and the surrounding complex environment, which seriously affects the energy level to which the beam can reach. According to the traditional method, the calibration voltage value is acquired through complex physical calculation, a script program is used to automatically input for continuously trying, and the process is complex and tedious. According to the invention, calibration coils integrated in three groups of horizontal and vertical quadrupole magnets in the intermediate energy beam transmission section are analyzed, and the accelerator environment is modeled by using the characteristic of interactive learning between the environment and an intelligent agent by relying on enhanced learning, thereby being a beam deviation calibration method which uses a deterministic strategy to explore the continuous large state space and motion space and approaches to the optimal calibration voltage value by using a neural network.

The invention provides a fast cycle synchrotron with a homogeneous transverse beam current. The fast cycle synchrotron comprises a plurality of magnets, a magnet power supply, a vacuum pipeline, a beam current diagnostic unit and an ion extraction unit, wherein the plurality of magnets are used for synchronously accelerating ions, and the plurality of magnets comprises a two-pole magnet, a quadrupole magnet and a six-pole magnet; the magnet power supply is electrically connected with the magnets; the vacuum pipeline is configured to connect the plurality of magnets and limit moving trajectories of the ions; the beam current diagnostic unit is configured to monitor operating states of the accelerator and the beam current; and the ion extraction unit is connected to the vacuum pipeline, is used for extracting the accelerated ions and comprises a nonlinear multi-pole magnet arranged on an ion beam line, and the nonlinear multi-pole magnet is used for homogenizing the extracted beam current. The synchrotron adopts a full-capacitance energy storage magnet power supply technology, combines a multi-pole magnet transverse beam current homogenization technology, shortens the cycle period and greatly improves the average beam current intensity.

A neutron polarization apparatus is provided that provides a neutron beam polarized by an interaction between a spin of a neutron in an incident neutron beam and a magnetic field. The apparatus includes a quadrupole magnet (2) disposed around a passage of a neutron beam, a tubular neutron absorber (3) provided in the quadrupole magnet (2) along am axial direction of the neutron beam, and a solenoid coil (4) disposed at an exit of the quadrupole magnet (2), adiabatically coupling the quadrupole magnetic field produced by the quadrupole magnet (2) and applying a bipolar magnetic field. The neutron polarization apparatus can polarize a neutron with a high polarization unavailable in the prior art.

The invention provides a wire positioning device based on a quadrupole magnet and the vibrating wire technology. The wire positioning device comprises a quadrupole magnet having a magnet hole in the center, a uniform gradient magnetic field being formed in the magnet hole, and the quadrupole magnet being externally provided with a plurality of reference members; a magnet position adjusting mechanism located at the bottom of the quadrupole magnet for position adjustment of the quadrupole magnet in horizontal and vertical directions; and a wire vibration monitoring system, which comprises two sensors for monitoring the amplitude and phase of a wire in the horizontal and vertical directions, a sensor position adjusting mechanism for carrying the two sensors and for position adjustment, a signal collecting device for collecting voltage signals output by the two sensors, and a wire vibration excitation device for providing the wire with an AC signal of a specific amplitude and frequency. The invention also provides a wire positioning method based on the quadrupole magnet and the vibrating wire technology, which uses the device to position the wire.

The method aims to solve the problems of an existing gradient integral measuring method during the rolling angle determining operation and the hall piece alignment operation. The invention provides anintegral measurement method and an integral measurement device for the magnetic field gradient of a quadrupole magnet. The method comprises the steps of 1) placing a to-be-tested quadrupole magnet onan optical platform and enabling the aperture direction of the quadrupole magnet to be in the Z-axis direction; 2) adjusting the hall piece to enable the normal line of the measuring plane of the hall piece to be perpendicular to the Z-axis direction; 3) moving the hall piece in the Y-axis direction, and observing the measurement reading change thereof; 4) adjusting the rolling angle of the to-be-tested quadrupole magnet around the Z-axis direction; 5) repeating the step 3) and the step 4) till the reading of the magnetic field measured during the movement of the hall piece along the Y-axis direction does not change again; 6) adjusting the hall piece to enable the hall piece in the aperture of the to-be-tested quadrupole magnet, carrying out measurement along the direction from (+d, 0, -L) to (+d, 0, +L), and recording the measurement value of the magnetic induction intensity B1; carrying out measurement along the direction from (-d, 0, -L) to (-d, 0, +L), and recording the measurement value of the magnetic induction intensity B2; 7) obtaining the gradient integral value (img file = 'DDA 0001503498900000000011.TIF 'wi = '851 'he = '166 ' ). According to the invention, the problemthat a conventional optical method depends on a mechanical reference is solved.

High-temperature superconducting (HTS) devices and methods are disclosed. An HTS cable subassembly has a rectangular shaped cross section. The subassembly includes a stack of tapes formed of a superconducting material, and a cable subassembly wrapper wrapped around the stack of tapes. The tapes in the stack are slidably arranged in a parallel fashion. A cable assembly is formed of a cable assembly wrapper formed of a second non-superconducting material disposed around an n×m array of cable subassemblies. Within a cable assembly, a first cable subassembly of the array of subassemblies is oriented substantially perpendicular to a second cable subassembly with regard to the plurality of tapes. A compound-cable assembly is formed by joining two or more cable assemblies. A high-temperature superconducting magnet is formed of a solenoidal magnet as well as dipole and quadrupole magnets wound of a cable subassembly, a cable assembly, and/or a compound cable assembly.

A heavy ion synchroaccelerator comprises an annular vacuum pipeline, the annular vacuum pipeline has a plurality of linear ion beam sections and a plurality of curve ion beam sections, the linear ionbeam sections and the curve ion beam sections are alternately arranged, heavy ions are injected from a first linear ion beam section and are led out from another linear ion beam section, each curve ion beam section comprises one first dipole magnet and one second dipole magnet which are connected in series, the heavy ions are moved from the first dipole magnets to the second dipole magnets, vertical correcting magnets and vertical focusing quadrupole magnets are arranged in order between the first dipole magnets and the second dipole magnets, the linear ion beam sections at the downstreams ofthe second dipole magnets are provided with horizontal correcting magnets, hexapole magnets and horizontal correcting quadrupole magnets in order. The heavy ion synchroaccelerator is simple in structure, can save processing cost, facilitate installation and debugging of the device, is easier to achieve high accumulation flow intensity, and can fully utilize transverse acceptability of the synchroaccelerator.

The invention discloses a high-temperature superconduction four-pole magnet structure applicable to a particle medical transportation technology. The high-temperature superconduction four-pole magnetstructure comprises a yttrium barium copper oxide high-temperature superconduction coil, a low-temperature conduction cooling structure, a coil connector design, an iron core and coil external vacuumheat insulation structure and an epoxy plate support assembly, wherein a yttrium barium copper oxide strip is embedded into a coil matrix groove, each high-temperature superconduction coil of the magnet is connected in series, the high-temperature superconduction connector is pressed and connected by an indium sheet, the coil is conducted and cooled by a refrigerating machine, a cold screen and atile are further arranged outside the iron core and the coil and are used as the vacuum heat insulation structure, and an iron core assembly in the magnet and the cold screen are fixed by the epoxy plate support assembly. By the high-temperature superconduction four-pole magnet structure, the focusing function of particle beams in a particle transportation system can be achieved, and the size, theweight and the cost of the magnet are effectively reduced; and the requirements such as low-temperature conduction cooling, structural strength, leakage heat reduction and quench protection of a superconduction wire stably running at a temperature zone of 40K are met, and the miniaturization, the lightness and the low cost of the magnet structure are achieved.

The invention discloses a beam transmission system, which comprises a beam jetting device and a target workpiece as a beam transmission terminal. A pair of parallel first rod-shaped quadrupole magnets positioned on the two sides of a beam path respectively is arranged between the beam jetting device and the target workpiece, the sum of the current values in the coils of the two first rod-shaped quadrupole magnets is kept at a first preset value, and the current value in the coil of each first rod-shaped quadrupole magnet constantly changes between a preset upper limit and a preset lower limit. The invention also discloses a beam transmission method realized by utilizing the beam transmission system. According to the invention, the intensity distribution and the angle distribution of the beam can be controlled by controlling the current values of one or two pairs of rod-shaped quadrupole magnets, so as to improve the beam utilization efficiency and further facilitate the optimization of the dose uniformity and the angle uniformity of the beam. Meanwhile, because of the focusing effect of the rod-shaped quadrupole magnets, the beam transmission efficiency is improved, and the beam intensity when the beam is transmitted to the workpiece is increased.

The invention discloses a quadrupole mass-spectrometer which comprises an ion generation mechanism, a quadrupole rod filtering mechanism, an ion detection mechanism and a supporting connection mechanism. Gaseous ions are generated in the ion generation mechanism, guided out, accelerated, focused and then emitted into a quadrupole rod. Direct voltage and alternating voltage are overlapped on the quadrupole rod, so that ions with corresponding mass-to-charge ratios penetrate and are detected by a Faraday cup; accordingly, the components and residual amount of gas are obtained; compared with other mass-spectrometers, the structure and circuit of the quadrupole mass-spectrometer is simpler and lower in cost.