37 results about "High energy accelerator" patented technology

A negative ion-based neutral beam injector comprising a negative ion source, accelerator and neutralizer to produce about a 5 MW neutral beam with energy of about 0.50 to 1.0 MeV. The ions produced by the ion source are pre-accelerated before injection into a high energy accelerator by an electrostatic multi-aperture grid pre-accelerator, which is used to extract ion beams from the plasma and accelerate to some fraction of the required beam energy. The beam from the ion source passes through a pair of deflecting magnets, which enable the beam to shift off axis before entering the high energy accelerator. After acceleration to full energy, the beam enters the neutralizer where it is partially converted into a neutral beam. The remaining ion species are separated by a magnet and directed into electrostatic energy converters. The neutral beam passes through a gate valve and enters a plasma chamber.

The invention belongs to the technical field of mechanics test devices, and specifically relates to a high-energy accelerator CT rock mechanics test system. The high-energy accelerator CT rock mechanics test provided by the invention comprises a mechanics test machine, a high-energy accelerator CT ray source and a detector, the mechanics test machine is arranged between the high-energy acceleratorCT ray source and the detector, the mechanics test machine comprises a fixed component, a rotary apparatus and a pressure chamber, the rotary apparatus is arranged on the fixed component, the pressure chamber is connected with the rotary apparatus, and when a test is executed, the pressure chamber can rotate relative to the fixed component under driving of the rotary apparatus. The test machine is provided with the rotary apparatus, and when the test is executed, the pressure chamber is driven by the rotary apparatus to rotate, namely, a test sample can be scanned in a process in which a loadtest is executed for the test sample, consequently, CT imaging can completely reflect a structural state of the test sample when the test sample is loaded, and scientific researches are facilitated more.

The invention relates to a preparation method for a nuclear pore filtering film and particularly relates to the nuclear pore filtering film with an hourglass type pore channel shape. The invention provides an hourglass type pore channel nuclear pore filtering film and a preparation method thereof. The preparation method comprises the following steps: radiating a PET (Polyethylene Terephthalate) or PC (Polycarbonate) thin film by heavy ions provided by a high-energy accelerator to form a latent trace; selecting a NaOH etching solution and carrying out pre-etching on a radiated polymer thin film; putting the film into a constant-temperature box with a certain temperature and annealed; finally, etching by using a NaOH solution. The hourglass type pore channel nuclear pore filtering film comprises a nuclear pore which is formed on the polymer thin film by radiating and etching through the heavy ions; the section of a pore channel of the nuclear pore is similar to an hourglass shape. The polymer thin film is the PET/PC thin film; the thickness is 10-30 microns; the range of the pore diameter of an outer pore is 2-10 microns and the range of the pore diameter of an inner pore is 0.2-3 microns. Compared with columnar and tapered pore shapes, an hourglass type pore channel can improve the filtering speed except the previous filtering precision is kept; meanwhile, the dirt containing capability of the nuclear pore filtering film is improved and the nuclear pore filtering film is not easy to block, so that the filtering performance of the nuclear pore filtering film is improved.

The invention relates to a directional wide-energy-range neutron monitor probe, which is suitable for directional neutron place monitoring and metering transmission of high-energy accelerators and reactors. The probe includes a detector sensitive to thermal neutrons (1), an inner-layer moderator (2), a propagation layer (3), a reflecting layer (4), an absorber (5), an outer-layer moderator (6), a cadmium cap (7), an outer package (8), and a unidirectional plane of incidence (9). A neutron monitor adopted by the invention helps to solve the problems about on-site monitoring and magnitude transmission of high-energy and wide-spectrum neutron radiation fields. The neutron monitor probe is designed in a directional and moderated manner. Fissionable metal materials are embedded into the moderators, so a (n, f) fission reaction is utilized to widen the measuring range of high energy neutrons. Neutron reflective materials are embedded into the moderators, so angular response and energy response can be improved. The directional wide-energy-range neutron monitor probe has the characteristics of novel structure, wide monitored neutron energy range, good angular response feature and the like.

The invention relates to a particle accelerator which generates high-velocity charged particles artificially. The particle accelerator comprises a high-voltage generator, a metal spray point, a glass vacuum tube, piezoelectric ceramic elements or natural ore particles of piezoelectric property and a metal target. The glass vacuum tube is filled with the piezoelectric ceramic elements or the natural ore particles of piezoelectric property, one end of the glass vacuum tube is provided with the metal spray point which is connected with the high-voltage generator through a wire, and the other end of the glass vacuum tube is internally provided with the metal target which is connected with a metal wire. The metal target is led out of the glass vacuum tube via the metal wire, and both ends of the glass vacuum tube flatten glass seals. The glass vacuum tube is provided with a vacuum outlet, which can be vacuumized through the vacuum outlet, and an external port of the vacuum outlet is roasted to be sealed.

The invention relates to a damage control method for ultraprecision turning of a crystal material. The damage control method for ultraprecision turning of the crystal material comprises the steps that a multi-layer amorphous system is designed according to the to-be-machined material and cutting parameters, the number, the depth and the thickness of amorphous layers are determined, the ion irradiation process is simulated through the Monte Carlo numerical method, and an ion source, implantation energy and the dosage combination are worked out; ion irradiation is conducted through an ion implanter or a high-energy accelerator according to the worked-out implantation parameters, and a multi-layer amorphous structure in the material is prepared; the allowable maximum feed rate for turning is determined according to the arc radius of a tool, the cutting depth, geometrical parameters of the amorphous layers, and the brittleness-plasticity conversion thickness of the workpiece material; and planar machining is conducted on a modified crystal according to the turning parameters.

The invention provides a detection device for the uniformity of a light field and a radiation field. A square flat board serves as a main body and comprises the upper portion, the middle body and the lower portion. The upper portion and the lower portion are respectively an organic glass shell. The upper portion is provided with at least one light field frame. The upper shell is provided with symmetry axes and a direction marking hole, wherein the symmetry axes are perpendicular to each other. The middle body is a flat board provided with symmetry axes, a dimension marking hole and a direction marking hole, wherein the symmetry axes are perpendicular to each other. According to the detection device for the uniformity of the light field and the radiation field, as the dimension marking hole is formed in the middle marking board, the error of the light field and the radiation field of an exposed film can be directly read out from the middle marking board provided with the dimension marking hole, then the problem that time is consumed and labor is wasted when the light field and the radiation field are detected in the prior art can be solved effectively, and the accuracy of detection results is improved. Meanwhile, the detection device for the uniformity of the light field and the radiation field is simple in structure, practical and free of maintenance, and the defects that marks made for film exposure in the prior art are difficult to distinguish, errors occur easily, a high-energy accelerator CR sheet cannot be used, and a two-dimension ionization chamber is poor in matrix accuracy, high in price and high in maintenance cost can be overcome effectively.

The invention belongs to the field of geotechnical engineering tests, particularly relates to a visual test system and a rock mass heating method, and aims to solve problems that uniform heating of arock mass test piece and visual detection of a crack propagation process of the rock mass test piece in a high confining pressure state cannot be realized in a simulation test. The system comprises atest chamber system, a heating system, a pressure control system and a high-energy accelerator CT detection system used for scanning and detecting seepage migration of magnetofluid in a test piece crack. The test chamber system comprises a pressure chamber and a test piece packaging device arranged in the pressure chamber in an oil immersion mode. The heating system comprises a magnetofluid heating device, a resistance wire heating device and a temperature detection device. The magnetofluid heating device comprises a magnetofluid loading pump for supplying magnetofluid injected into the test piece packaging device, and an alternating magnetic field control device for providing an alternating magnetic field for heating the magnetofluid; and the resistance wire heating device is used for heating hydraulic oil. According to the invention, visual simulation detection of a crack connectivity change in the rock mass fracture process is realized.

The invention belongs to the technical field of tunnel engineering, discloses a visual device for simulating tunnel excavation, and aims to solve the problem that tunnel excavation real simulation andstress deformation state visual detection cannot be realized in a simulation test. The visual device comprises a high-energy accelerator CT scanning system, a turntable system, a tunnel model system,an excavation system and a vibration system. The vibration system is arranged on the upper side of the tunnel model system and is used for simulating construction blasting borne by tunnel surroundingrock or the seismic environment. Tunnel drilling is simulated through a drilling device arranged in the excavation system. A moving device arranged in the excavation system controls the propelling movement of the drilling device. The high-energy accelerator CT scanning system cooperates with the turntable system to achieve visual detection of stress deformation of the tunnel surrounding rock. According to the excavation system and the vibration system, tunnel excavation and stress deformation of the surrounding rock can be truly simulated, and the visual stress deformation state is obtained through the scanning system and the turntable system.

A phase switch (energy switch) comprising a three-cavity system (an end-coupled cavity+side-passed accelerate cavity+an end-coupled cavity) and a separate single couple cavity is disclosed. The phase shift between the adjacent accelerate cavities is π when the three-cavities system is disordered (state ‘0’); and a microwave pass through the three-cavities system to the adjacent accelerate cavities, the phase between the adjacent accelerate cavities is change to 2π (or 0) when the single couple cavity is disordered (state ‘1’). When the state 0changes to state 1, the field phase in the structure behind the system is changed to π, thereby to switch the phase. In the two states, the entire structure operates in π/2 mode, that is very stable. That is very important for the medical accelerator. The detaining components have been moved outside the cavity when the single couple cavity or the three-cavity system is in the operate state, without warring about high frequency breakdown. By changing couple between the two end-coupled cavities in the three-cavity system and the adjacent accelerate cavities and between the cavities in the system, the relative field-strength in the acceleration section besides the switching is changed while the phase reverses. It can be used for 6 Mev accelerator middle-energy or high-energy accelerator.

The invention belongs to the technical field of geotechnical engineering tests and provides a visual test system for simulating grouting and seepage processes of a fractured rock mass. The system aimsto solve a problem that visual detection of rock mass grouting and seepage migration processes under high and low temperature conditions cannot be realized in a simulation test. The system comprisesan experiment cabin system, a grouting system, a temperature control system, a water permeation control system, a rotary bearing system and a detection scanning system. The grouting system is used forinjecting grout to simulate the grouting process of a test piece; the temperature control system is used for controlling the temperature of a circulating bath lotion; the water permeation control system is used for conveying a seepage liquid; and the detection scanning system comprises a high-energy accelerator CT detection system and a PET detection system which are used for detecting slurry seepage migration and liquid fluid migration respectively. By means of the temperature control system, the grouting system and the water permeation control system, rock mass grouting simulation under thehigh and low temperature conditions can be achieved, and meanwhile real-time visual detection of the rock mass grouting and seepage migration process can be achieved through the detection scanning system.

The invention discloses a true triaxial real-time scanning CT (Computed Tomography) test device and method for a high-pressure hard rock fracture process. The device comprises a rigid frame, a rigid cross beam, a cross beam lifting guide vertical column, a a cross beam lifting driving oil cylinder, upper and lower loading bases, upper and lower base rotary driving platforms, a high-energy accelerator CT ray source, a high-energy accelerator CT detection source, and four actuators, wherein the upper loading base and the lower loading base are each provided with two actuators, the four actuatorsare integrally distributed in a 45-degree inclined mode, a supporting cylinder is matched between the upper loading base and the lower loading base to form a pressure chamber, the pressure chamber islocated between the CT ray source and the detection source, and the pressure chamber can horizontally rotate by 360 degrees. The method comprises the following steps of: preparing a sample assembly,scanning the vacant pressure chamber through CT equipment, and providing reference data for subsequent image processing; placing the sample assembly in the pressure chamber, and controlling the rigidcross beam to descend until the pressure chamber is closed; centering and clamping the sample assembly, rotating the pressure chamber, and acquiring a three-dimensional image of the sample through theCT equipment; and applying a true triaxial stress, rotating the pressure chamber, and acquiring three-dimensional images of the sample under various stress conditions through the CT equipment.

The invention discloses a method for plant radiating mutagenesis. Seeds are sewed and screened to gain mutants after wave rays are utilized to radiate peripheral cells of the stem apex meristem of seeds of plants which are damaged. The invention has the advantages that firstly, the penetration of a shallow layer of wave rays has relatively little damage to fetus of seeds, thereby death rate of seeds is very low, which is equal to improving the mutagenesis base, secondly, wave ray functions of different varieties and different energy can generate small molecules of different signals which are conducted to the stem apex meristem area and arouse bond breaking of corresponded DNA molecules, and mutation varieties which are numerously generated have the characteristic of directional mutation, thirdly, the process time is short and the mutation efficiency is high, fourthly, toxic substances are not involved in the invention, and the invention has no toxicity and harm, is safe and protects the environment, fifthly, a high-energy accelerator is not needed, which greatly reduces cost.

The invention provides a method and apparatus for efficiently operating an ion implantation apparatus including a charged particle accelerator in high energy mode and low energy mode. A charged particle accelerator includes a high voltage power supply, an accelerator column coupled to the high voltage power supply, and a switch assembly. The accelerator pillar includes a multitude of accelerator electrodes. The high voltage power supply is disabled in low energy mode to energize the accelerator pillars to release energy. The switch assembly includes a switch element that electrically connects the accelerator electrode to the reference potential in the low energy mode and electrically isolates the accelerator electrode from the reference potential in the high energy mode. In the low energy mode, the switch assembly prevents positive potentials on the accelerator electrodes while delivering the positive ion beam, and thus minimizes space charge expansion of the ion beam.

The invention discloses single-stage and multi-stage pulse forming lines based on a glass fiber plate and an induction superposition device of the single-stage and multi-stage pulse forming lines. Thesingle-stage and multi-stage pulse forming lines comprise an MOSFET driving circuit, an MOSFET switch, a glass fiber plate base material and a plurality of layers of copper-clad electrodes. The MOSFET driving circuit and the MOSFET switch are welded on the upper surface of the glass fiber plate substrate; the MOSFET driving circuit is connected with the MOSFET switch and is used for driving the MOSFET switch; the MOSFET switch and the Blumlein pulse forming line generate a pulse voltage with MHz repetition frequency and an ns-level pulse width amplitude of hundreds of volts; pulse voltage output of MHz repetition frequency, ns-level pulse width and tens of kV amplitude values of a superposition device is realized by utilizing a cascading Blumlein pulse voltage superimposing technology andan induced voltage superimposing technology means; the induced voltage superposition device can generate high-amplitude superimposed voltage output with MHz repetition frequency and ns-level pulse width, is used for driving a resistor load, can generate a high-gradient electric field in a diode region, and is used for leading out an electron beam of a high-energy accelerator.