56 results about "Proton" patented technology

The utility model provides a kind of proton acceleration system, neutron generating device and isotope generating device.The proton acceleration system includes radio frequency quadrupole acceleration module, at least has radio frequency quadrupole accelerator;Drift tube linear accelerator module, at least has drift tube linear accelerator.Based on the above-mentioned proton acceleration system, first by radio frequency quadrupole acceleration module to proton beam is accelerated to handle, so that the energy of proton beam reaches first energy value;Further energy adjustment processing is carried out to the proton beam of first energy value by drift tube linear accelerator module, so that the energy of proton beam reaches the second energy value that meets requirements.

A radiation dose quantification method and system, the method comprising: detecting, with one or more detectors with respective sensitive volumes, gamma-rays emitted as a result of capture of neutrons by a composition in a subject subjected to an irradiation program, the composition comprising one or more thermal neutron capture agents, the neutrons having been generated by non-elastic collisions between a primary beam of particles and nuclei in the subject, wherein the particles consist of any one or more of protons, deuterons, tritons and heavy ions, the irradiation program comprises at least one period of irradiation with a beam duration that includes beam-on periods and beam-off periods; applying at least one predefined energy window or filter configured to accept only detection events in the one or more detectors resulting from gamma-rays with an energy indicative of selected gamma-rays arising from the capture of thermal neutrons by the one or more thermal neutron capture agents, wherein the thermal neutrons are neutrons with energies below approximately 0.4 eV; applying a timing window configured to reject or ignore detection events in the one or more detectors resulting from at least prompt gamma-rays produced in non-neutron capture events; and determining the radiation dose of neutron radiation received by the subject during the irradiation program from at least the accepted detection events or determining a dose map of the radiation received by the subject from at least the accepted detection events.

The application discloses a rapid detection method of paraffin in beeswax. The detection method comprises the following steps: dissolving the to-be-detected beeswax sample by using a deuterium solvent to perform nuclear magnetic resonance hydrogen spectrum test, and qualitatively and quantitatively analyzing the paraffin in the beeswax according to the nuclear magnetic resonance hydrogen spectrum result. Two conditions need to be met simultaneously when using the nuclear magnetic hydrogen spectrum to judge whether the paraffin is doped in the beeswax: (1) an ester characteristic proton peak appears near the chemical shift of 4.07 ppm; and (2) the relative integral intensity of the alkyl proton peak in the chemical shift range of 0.9-1.58 ppm is obviously enhanced compared with a standard spectrum. The detection method is simple and rapid, has good linear relationship, high accuracy and good repeatability.

The invention discloses a rapid analysis method for single event upset of an SRAM (Static Random Access Memory) caused by MeV energy region protons, which comprises the following steps: establishing a target geometric model according to a device structure of the SRAM; constructing a material parameter database; iteratively simulating the transportation process of protons in the target material geometric model and acquiring the total energy deposition of the protons in the sensitive volume based on a material parameter database by adopting a mixed algorithm combining a continuous energy loss model and a discrete scattering model; the total energy deposition of each proton in the sensitive volume is compared with a preset energy deposition threshold value, if the total energy deposition exceeds the threshold value, it is judged that a single event upset event occurs, and the total number of events is counted; and based on the total number of events, the total number of incident protons, the total number of bits of the SRAM and the surface area of the target geometric model, obtaining the single event upset cross section.

The application provides an integrated scanning magnet and a proton heavy ion treatment device, which can be applied to the technical field of particle accelerators. The integrated scanning magnet comprises a core, a first scanning coil, a second scanning coil group, a three-dimensional adjustable base and a water distributor. The first scanning coil is symmetrically arranged along a first horizontal direction perpendicular to the propagation direction of the beam, and is used for generating a first deflection magnetic field along the first horizontal direction. The second scanning coil group is symmetrically arranged along a second horizontal direction perpendicular to the propagation direction of the beam, and is used for generating a second deflection magnetic field along the second horizontal direction. The second scanning coil group comprises a first group of coils and a second group of coils, and the second group of coils is used for optimizing the excitation efficiency of the window frame core. The core adopts a window frame structure, and the end plate and the core body are communicated with a slot to reduce the eddy current loss. The X and Y direction scanning coils are integrated in the same core, the Z direction size of the treatment head is significantly shortened, and the weight of the rotating gantry is reduced.

A nuclear fusion device and a method for controlling nuclear fusion intensity are disclosed. The nuclear fusion device includes a nuclear beam generation unit that emits a nuclear beam, a reaction vessel filled with nuclear fusion material, a thermal energy output system and an electrical energy output system that convert the energy produced by the nuclear fusion reaction into thermal energy and electrical energy for output. The reaction vessel receives the nuclear beam, which reacts with the nuclear fusion material inside to produce neutrons, achieving a neutron nuclear fusion cycle reaction and releasing energy. The nuclear beam includes at least one of a triton beam with a single nucleus energy of 50 KeV-1 MeV, a deuteron beam with a single nucleus energy of 100 KeV-5 MeV, and a proton beam with a single nucleus energy of 2-10 MeV; the nuclear fusion material includes polyatomic molecules, which at least include 6LiD and 7LiD.

The invention provides a simulation method and system for analyzing material multi-scale evolution under proton and electron comprehensive irradiation, and belongs to the field of material irradiation effect simulation and performance evaluation. The problems that an existing entity irradiation experiment is high in cost, single in simulation method, incapable of equivalently integrating an irradiation environment and lack of defects-insufficient performance association are solved. The method comprises the following steps: calculating and screening PKA atom information of proton and electron irradiation; constructing a PKA spectrum corresponding to protons / electrons under a continuous energy spectrum; the PKA irradiation process is coupled with other atomic scale processes and is used for an equivalent comprehensive irradiation experiment; carrying out high-throughput PKA molecular dynamics calculation and material defect analysis; defect-performance correlation analysis and comprehensive irradiation performance evaluation are carried out. According to the method, the limitation of entity experiments is broken through, the research cost is greatly reduced, the research period is shortened, and irradiation parameters can be flexibly regulated and controlled; the multi-scale process accurate coupling can be realized, and the problem that the comprehensive irradiation effect cannot be reflected by single simulation is solved.

To provide an estimation device, an estimation method, and a program capable of estimating an SEU cross section with high accuracy.SOLUTION: A measurement unit 12 counts the number of SEUs generated when a semiconductor device 13 is irradiated with neutrons or protons emitted from a radiation source 11 to measure an SEU probability, a setting unit 21 sets an arithmetic expression for calculating the SEU probability based on a model function simulating an SEU cross section, a calculation unit 22 calculates an estimated value of the SEU probability based on the arithmetic expression, and a comparison unit 23 compares a measured value of the SEU probability with the estimated value and changes a model parameter included in the model function such that the measured value matches the estimated value. The setting unit 21 changes the model function using the model parameter changed by the comparison unit 23, corrects the model function based on the SEU probability measured by the measurement unit 12 when the radiation source 11 irradiates the semiconductor device 13 with protons, and estimates the corrected model function as the SEU cross section.SELECTED DRAWING: Figure 1

The application discloses a kind of proton, negative hydrogen ion, hydrogen atom three charge state beam extraction device, its characteristics are: in the trajectory of beam acceleration to extraction energy, there is proton, negative hydrogen ion, hydrogen atom three charge state beam extraction device;The three charge state or double-charge state beam extraction device is equipped with stripping target and / or electrostatic deflection plate combined by different thickness and different position stripping film, the different position stripping film is used to adjust the proportion of each component beam online, the different thickness refers to according to the demand of multi-charge state beam extraction, stripping film is set to different thickness;The different position refers to on the trajectory of beam extraction, the front and back position of the multiple stripping films is different and the radial position is different between each other.The application solves the problem that the prior art can only extract single-charge state beam, and can only adjust the total flow intensity of each charge state beam online, but cannot adjust the flow intensity of each charge state beam respectively.

To provide a method for analyzing the higher-order structure of a nucleic acid.SOLUTION: Detecting a peak of imino proton within a range of chemical shift values of 10.0 to 16. 0ppm in a proton nuclear magnetic resonance spectrum; Determining the types of base pairs, optionally performing principal component and clustering analyses of the circular dichroism spectra, and optionally performing circular dichroism temperature shift measurements at single wavelengths in the range of 220 to 320nm; A step of performing curve fitting using a thermodynamic equilibrium model and performing evaluation, a step of performing ultraviolet temperature change measurement at a single wave length within a range of 290 to 300nm in some cases, and a step of determining that two or more types of nucleic acid higher-order structures including a guanine quadruplex structure are formed in a case where fitting to a state model indicating equilibrium of two or more states is shown, A step of determining that a guanine quadruplex structure is not formed when no fit to any state model indicating an equilibrium of two or more states is shown.SELECTED DRAWING: None

The invention discloses a solid-state target system for producing multiple nuclides by multiple particles, and relates to the technical field of radionuclides. The target cavity is arranged on the right side of the accelerator; a combined target is arranged in the target cavity, and various radionuclides are generated after the combined target is irradiated by the accelerator; the fixing device is arranged in the target cavity, connected with the combined target and used for fixing the combined target; and the cooling system is connected with the target cavity and is used for cooling the combined target. The invention solves the problem of single type of nuclides produced by an accelerator in the prior art, and provides a solid-state target system for producing multiple nuclides by multiple particles.

Disclosed herein are methods for producing a radium or barium target. The methods include providing an organic-aqueous electrolyte bath solution comprising radium or barium ions, exposing a deposition surface of a target substrate to the electrolyte bath solution, wherein the target substrate comprises at least one of copper and aluminum, and wherein the deposition surface comprises at least one of copper, aluminum, gold, platinum, rhodium or silver, and applying an electric potential between an anode and the target substrate for a deposition cycle time, thereby electrodepositing a layer of radium or barium containing material out of the bath solution and onto the deposition surface. Also disclosed are targets for subsequent exposure to an accelerated proton beam.

The application discloses a multi-charge-state beam extraction device for a negative hydrogen ion cyclotron, which comprises the following steps: arranging a three-charge-state beam extraction device of protons, negative hydrogen ions and hydrogen atoms on the track of the accelerated beam to an extraction energy; or arranging a double-charge-state beam extraction device of protons and negative hydrogen ions; or arranging a double-charge-state beam extraction device of protons and hydrogen atoms; and the three-charge-state or double-charge-state beam extraction device is provided with a stripping target and / or an electrostatic deflection plate which are combined by stripping films with different thicknesses and different positions, the different position stripping films are used for online adjusting the proportion of each component beam, and the different positions refer to the front and rear positions and the radial positions of the plurality of stripping films on the track of the beam extraction. The application solves the problem that the prior art can only extract a single-charge-state beam and can only online adjust the total flow intensity of each charge-state beam but cannot adjust the flow intensity of each charge-state beam.

The invention relates to the technical field of magnesium alloys, and discloses a high-strength, high-thermal-conductivity and high-radiation-shielding magnesium alloy and a preparation method thereof, and the magnesium alloy comprises the following chemical components in percentage by mass: 0.1-9.0 wt% of Gd, 3.0-10.0 wt% of Zn, 0.1-0.8 wt% of Zr, 0.1-0.8 wt% of Mn, and the balance of Mg and inevitable impurity elements. According to the invention, a given proton / electron / neutron protection index of a spacecraft key component is satisfied, and the lightweight advantage is obvious.

The application discloses a kind of proton, hydrogen atom double-charge state beam extraction device, its characteristics are: in the trajectory of beam acceleration to extraction energy, there is proton, hydrogen atom double-charge state beam extraction device;The double-charge state beam extraction device is provided with stripping target and / or electrostatic deflection plate combined by stripping film of different thickness and different position, the different position stripping film is used to adjust the proportion of each component beam online, the different thickness refers to according to the demand of multi-charge state beam extraction, stripping film is set to different thickness;The different position refers to the trajectory of beam extraction, the front and rear position of the multiple stripping films is different and the radial position is different between each other.The application solves the problem that the prior art can only extract single-charge state beam, and can only adjust the total flow intensity of each charge state beam online, but cannot adjust the flow intensity of each charge state beam respectively.

The application discloses a kind of electrochemical reaction driven proton conduction simulation method, it relates to molecular simulation technical field.The application includes: constructing PEM solution structure model and bipolar plate structure model;PEM solution structure model, bipolar plate structure model is sequentially arranged along the height direction of simulation box, and BPP / / PEM sandwich structure model is obtained;Annihilation region and generation region are set in the region of proton exchange membrane close to cathode and anode respectively;Delete proton in annihilation region and randomly generate equivalent proton in generation region, to simulate the charge transfer process of bipolar plate structure model and external circuit;The occurrence number of proton hopping molecular simulation process and the distribution state of proton in system are counted, and the conduction performance of proton under different conduction paths is evaluated based on the statistical result.The application not only reproduces the proton conduction phenomenon, but also reveals the internal correlation between transmission characteristics and structural characteristics from nanometer level.

The invention discloses a single-source multi-beam boron neutron capture therapy system, and relates to the field of radiotherapy equipment. The system comprises a set of low-energy proton accelerator, an electromagnetic field steering part and two or more treatment rooms, wherein each treatment room is provided with a corresponding target material and a neutron moderation device. The method comprises the following steps of: guiding proton beams to respectively bombard a plurality of target materials to generate fast neutrons through an electromagnetic field steering part by utilizing the electrification characteristic of protons, moderating the fast neutrons into thermal neutrons (suitable for superficial tumors) or epithermal neutrons (suitable for deep tumors) through a neutron moderating device made of a hydrogen-containing or fluorine-containing moderating material, and guiding the thermal neutrons or epithermal neutrons to a corresponding treatment room. Through a single-source multi-beam architecture, multi-energy neutron beam output and multi-patient parallel treatment are realized on the basis of one set of accelerator, the treatment adaptation disease range is greatly expanded, the equipment cost and the occupied area are reduced, and the treatment flexibility and the equipment utilization rate are improved.

To obtain deuterium in a gas state from a mixed gas of hydrogen and deuterium at a low cost.A first electrode 11 is an electrode made of a metal allowing hydrogen (H component and D component) to permeate therethrough (hydrogen permeable metal), and the hydrogen permeable metal is Pd, for example. H ions and D ions having permeated through the first electrode 11 flow to the side of a second electrode 12 in a proton conduction layer 20. When the first electrode 11 is used as an anode and the second electrode 12 as a cathode, H ions and D ions flow in the proton conduction layer 20 from the left to the right in the drawing. In that case, hydrogen component in an input gas is more likely to flow into an atmosphere on the cathode side than deuterium component, and an H / D composition ratio accordingly becomes higher in a product gas than in the input gas. In an exhaust gas extracted after H and D components in the input gas are thus consumed, D component has been enriched.

This invention discloses a trapezoidal RFQ-IH DTL resonant-coupled radio-frequency proton linear accelerating cavity for a vehicle-mounted accelerator neutron source. The particle exit end of the RFQ is connected to the particle inlet end of the DTL; a coupling gap exists between the particle exit of the RFQ and the particle inlet of the DTL; the last RFQ support rod is configured as a semi-support rod, which is the structure retained after removing the portion of the RFQ support rod located on the RFQ electrode side of the RFQ; the length of the semi-support rod satisfies the condition that the RFQ and DTL can be coupled at the same frequency. By configuring the last RFQ support rod as a semi-support rod and determining the synchronous phase of the coupling gap, this invention achieves resonant coupling between the RFQ and DTL, thereby eliminating the need for the traditional MEBT transition section between the RFQ and DTL. Power is fed through a single power source, simplifying the power feeding system and significantly reducing weight.

The invention relates to a compact superconducting cyclotron for isotope production. The high-current ion beam generator comprises a high-charge-state ECR ion source and a high-current proton source, the high-charge-state ECR ion source generates a milliampere-level high-charge-state heavy ion beam, and the high-current proton source generates a milliampere-level proton beam and a hydrogen molecule ion beam. An inlet of the injection beam line is connected with the high-charge-state ECR ion source and the high-current proton source. And a low-energy high-current ion mixed beam generated by the high-current ion beam generator is transmitted to the accelerator through the injection beam line. And the accelerator is connected with two symmetrical lead-out beam lines through a lead-out channel of the accelerator, and the two lead-out beam lines are positioned on the two sides of the accelerator so as to lead out a high-energy strong-current heavy ion beam and a high-energy strong-current proton beam. The advantages of the heavy ion beam and the proton beam are considered, and the medical TAT isotope is produced more efficiently and safely.

Provided herein are high energy ion beam generator systems and methods that provide low cost, high performance, robust, consistent, uniform, low gas consumption and high current / high-moderate voltage generation of neutrons and protons. Such systems and methods find use for the commercial-scale generation of neutrons and protons for a wide variety of research, medical, security, and industrial processes.

The application discloses a kind of strong current proton cyclotron production 225 Ac- 22 Na- 68 Method for producing Ge isotopes, comprising the following steps: selecting a plurality of target nuclides capable of fully utilizing the accelerator energy interval; each nuclide produces an energy interval corresponding to the production of two target nuclides, and the reaction cross-section peak region of one of the target nuclides corresponds to the reaction cross-section valley region of the other target nuclide; selecting target materials and shells for producing different target nuclides in different nuclide production energy intervals, in the same nuclide production energy region, the reaction cross-section peak region of the target nuclide produced by the target material corresponds to the reaction cross-section valley region of the target nuclide produced by the shell; or in the same nuclide production energy region, the reaction cross-section peak region of the target nuclide produced by the shell corresponds to the reaction cross-section valley region of the target nuclide produced by the target material; The present application converts the original radioactive waste into valuable products, reduces the production and processing cost of radioactive waste, and realizes the recycling of resources.

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.

The invention relates to the technical field of particle physical detection and high-energy density physical diagnosis, in particular to an electron positron ion spectrometer, which comprises a collimation unit, an aiming unit and a shell, and is characterized in that a magnetic field dispersion unit, an electric field separation unit and a detection unit are arranged in the shell; a magnetic field area is formed on one side, opposite to the collimation unit, of the magnetic field dispersion unit so as to perform energy expansion on incident charged particles along a first direction; the electric field separation unit is orthogonally arranged with the first direction and distinguishes particle types along the second direction; the detection unit adopts a curved surface structure conformal with dispersion geometry, so that particles are incident approximately vertically and aberration is suppressed, and a two-dimensional pattern representing energy in an arc length direction and representing particle types in an arc height direction is obtained. Through the synergistic effect of the magnetic field dispersion unit and the electric field separation unit, clear spatial separation of positive electrons, protons and electrons in a wide energy region can be realized; and the detection unit adopts a curved surface structure conformal with dispersion geometry, so that the accuracy of wide-energy-region energy spectrum data can be ensured.

The invention discloses a method for generating nuclear energy by using pressure, which is called temperature nuclear energy, and comprises the following steps: S1, generating heat by friction, namely, from a macroscopic view, enabling relative movement of two objects to be relative displacement of two contact surfaces; from microscopic particles, the relative displacement of the two particle clusters occurs, the contact surface of the particle clusters is uneven, and the friction is the essence of mutual collision between atoms of the convex parts of the contact surface and the collision is the mutual pressure generated by the particles at the contact part, so that the friction is considered to be the friction between the particles at the contact part. The essence of friction is the pressure generated by mutual collision of particles between the convex parts of the two contact surfaces in relative movement, just like the principle of a proton collision machine and the effect of splitting generated by proton collision, the invention completes the imagination of a key stage of cold polymerization, and knows that the material is a complete universe cycle from radiation to polymerization, so that the method has the advantages of being simple in structure, convenient to operate and the like. Because the starting point is cold polymerization of substances, the method is substantially different from the mainstream of thermal polymerization in the current science.

The invention relates to the field of nuclear technology, and more particularly to technology for producing radioactive isotopes for medicinal purposes, especially actinium-225, as well as other radionuclides, formed during the charged-particle (proton) irradiation of thorium in an accelerator. A key issue for achieving a high yield of radionuclides during proton irradiation of a target is that of manufacturing the target from sufficiently thick metallic thorium enclosed in a hermetic metallic niobium casing which is resistant at high temperature to chemical and radiation damage. Effective water cooling during irradiation is achieved by assuring good contact of a niobium foil (proton beam entrance and exit windows) with the thorium, as well as with other niobium parts of the casing. For this purpose, during production of the target, diffusion welding is carried out at a temperature of 1250-1430°С and a pressure of 30-150 kg / cm2 on the surface area of the target, wherein a hollow channel is formed in advance in the niobium body of the target to compensate for greater expansion of the thorium during welding. The target may be additionally coated from the outside with a protective layer of from 40 to 100 μm of another metal resistant to water during irradiation.

The invention relates to a method, a system and equipment for acquiring a proton single event effect cross section curve, and the method comprises the steps: carrying out a proton single event effect experiment of an electronic device, building an RPP simulation model of the electronic device through a Monte Carlo simulation program according to the data of the proton single event effect experiment, and obtaining the proton single event effect cross section curve. The method comprises the following steps: simulating an RPP simulation model of a proton incidence electronic device with energy of E, counting the number of units generating a single event effect, calculating a proton single event effect section when the energy is E, and changing the proton incidence energy to obtain a proton single event effect section curve of a corresponding energy region. According to the method, the accuracy of the obtained proton SEE section curve is improved, and the method has an important value for guaranteeing the reliability of in-orbit error rate estimation of aerospace electronic devices.

A method of producing a radioisotope, includes irradiating a proton target with a beam of protons to produce a beam of neutrons and irradiating at least one neutron target with the beam of neutrons to produce a specified radioisotope. In some embodiments, the proton target is beryllium, the neutron target is radium-226 and the specified radioisotope is radium-225. The proton beam may be produced with a charged particle accelerator or a medical cyclotron.

The application discloses a minimum energy step-based electrostatic field micro-step jump detection method, which comprises the following steps: preparing an experimental device, wherein the experimental device comprises a scanning tunneling microscope, a piezoelectric ceramic displacement table and a Kelvin probe force microscope; the probe needle tip curvature radius of the scanning tunneling microscope is less than 2 nm; the extreme short-range ranging of the scanning tunneling microscope probe is 0.5 nm-5 nm; and the displacement precision of the piezoelectric ceramic displacement table is 0.0001 nm; preparing a single-charge quantum dot as a point charge to simulate a proton electric field; and fixing the single-charge quantum dot on a substrate. The purpose of the application is to provide the minimum energy step-based electrostatic field micro-step jump detection method, which can measure the field strength change of an electrostatic field under an extremely short range and extremely weak field strength, can observe whether the electric field can only jump and cannot slide, can verify that the point charge electric field is a minimum energy integer step, the field strength cannot continuously change, can further determine the hydrogen atom energy level and the existence of the step of the proton electric field.