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.

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 0 changes 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 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 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.

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 provides a Faraday cylinder for a high-energy high-current accelerator. The Faraday cylinder is mainly characterized in that the head portion of the Faraday cylinder is connected with a driving device through an adapter flange and a loose flange, and the head portion of the Faraday cylinder and the driving device are mutually independent. According to the Faraday cylinder for the high-energy heavy-current accelerator, a water inlet pipe, a water outlet pipe, a high-voltage cable and a signal cable on the head portion of the Faraday cylinder pass through the adapter flange and the loose flange and pass through the support cylinder of the driving device to extend to an atmosphere end. The adapter flange and the loose flange are each provided with a cutting edge, a copper pad is additionally arranged between the two flanges, and the two flanges are connected and sealed through a bolt, such that an atmosphere is isolated from a vacuum. According to the invention, the direction of the head portion of the Faraday cylinder can be conveniently adjusted, the head portion of the Faraday cylinder can be conventionally replaced, and convenience is brought to installation and maintenance. The interception surface of the Faraday cylinder and a water cooling body are in surface contact with each other, such that the water cooling effect is effectively enhanced. The conic node of the interception surface is easy to process, and the processed conic node is a point; and the field angle at the bottom of a cone effectively reduces the axial length of the cone.

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.