5 results about "High energy accelerator" patented technology

The invention belongs to the field of accelerators, and discloses a high-energy accelerator X-ray liquid-cooled rotating target and an accelerator, the high-energy accelerator X-ray liquid-cooled rotating target comprises an upper shell and a lower shell; the upper shell and the lower shell are fixedly connected through the electronic impact piece, and a disc-shaped cooling medium cavity is formed among the upper shell, the lower shell and the electronic impact piece. The electronic impact part comprises a target area and a heat conduction part, the target area is used for generating X-rays, and the heat conduction part is fixed to the upper shell and the lower shell and used for conducting heat to the upper shell and the lower shell; a spacer is arranged between the upper shell and the lower shell and divides the cooling medium cavity into an inflow cavity and an outflow cavity, the inflow cavity is located on the side, close to the lower shell, of the spacer, and the outflow cavity is located on the side, close to the upper shell, of the spacer; the disc-shaped water path is adopted in the rotating target, so that the heat exchange efficiency of cooling and heat dissipation of the rotating disc is improved, the cooling and heat dissipation effect is improved, the uniform degree of contact between the disc-shaped circulating water path and the peripheral wall of the inner side of the electronic impact piece is high, and the heat dissipation effect on the electronic impact piece is effectively improved.

The invention discloses a method for preparing 67Ga, 67Cu and 64Cu through irradiation of a medium-high energy accelerator, the method is based on a composite target composed of a first target material 70Zn and a second target material 68Zn, and the method comprises the following steps: step 1, when protons react with the first target material 70Zn, the half-life period of impurity nuclide 66Ga is smaller than that of 67Ga, and the half-life period of 64Cu is smaller than that of 67Cu; therefore, the division of the medium-high energy region is based on the standard of ensuring the maximum yield of 67Ga and 67Cu; and 2, when protons penetrate through the first target material and the second target material 68Zn to react, because the half-life period of impurity nuclide 67Cu is greater than that of 64Cu, the division of a low-energy region, the irradiation time and the number of cooling days meet the standard that the proportion of 64Cu / (64Cu + 67Cu) is greater than 99%. According to the method, production of several nuclides is considered, the energy interval suitable for production of each nuclide is determined through Monte Carlo simulation and theoretical calculation methods in one-time production, production of multiple nuclides is considered at the same time, and the purity of the target nuclide is larger than 99%.

The application belongs to the technical field of superconducting materials, and particularly relates to a superconducting composite wire and a preparation method thereof. The application provides a superconducting composite wire, which comprises, from inside to outside, an inner tin method Nb3Sn sub-element, a thermal sensitive phase change barrier layer, a Cu-Mn-Ni high-damping copper alloy stabilizing layer, a thermochromic warning coating and an outer insulating sheath. The application can be widely applied to high-field magnets in fusion reactors, high-energy accelerators and advanced MRI systems, and can significantly improve the operation safety and state monitoring capability.

The invention provides a method for producing 47Sc by irradiation of a medium-high-energy accelerator, which comprises the following steps: producing 47Sc by using a medium-energy section and a low-energy section of a 50MeV high-current proton cyclotron and adopting an indirect production mode and a direct production mode, and forming a composite target by a target material for indirectly producing the 47Sc and a target material for directly producing the 47Sc; in the middle energy section, the target material for indirectly producing nuclide is adopted to produce 47Sc, and the indirectly produced target material is that after the target material reacts with protons, parent isotope nuclide is firstly produced, and then daughter isotope 47Sc is produced through parent isotope decay; in the low-energy section, the target material for directly producing nuclide is adopted to produce 47Sc, the direct production of the target material means that the 47Sc is produced by using the optimal energy interval of the target material, and the optimal energy interval means that the isotope impurity in the interval is relatively 0; the 47Sc is directly or indirectly produced, the energy of a medium-high energy accelerator is fully utilized, and the produced 47Sc has the advantages of high yield and high purity and can meet the requirements of future market products.

The application discloses a tuning method for a four-cavity high-energy accelerator, and comprises the following steps: arranging a tuning motor and an electronic ruler on the outer part of each cavity of the four-cavity resonant cavity, setting the initial positions of the four tuning motors and the initial positions of the electronic rulers respectively equipped on the four tuning motors; moving the tuning motor M1, and using the tuning motor M1 to complete the searching of the resonant point in the S1 state of the low-level control system, the amplitude climbing in the S2 state, and the amplitude stable closed loop in the S3 state; when reaching the thermal balance, entering the voltage deviation compensation stage: taking the capacitance variation as a step, alternately adjusting the capacitance variations of the tuning motors M1, M2, M3 and M4, so that the voltage deviations among the tuning motors M1, M2, M3 and M4 are close to 0; the method of "step" + "electronic ruler" + "contrast table" + "fitting curve" + "alternately adjusting" is adopted, and the problem of deviation compensation confusion caused by signal delay and mechanical transmission error during multi-motor tuning is solved.