Abstract: A self-shield open magnetic resonance imaging superconducting magnet comprises five pairs of coils: shim coils, first main magnetic coils, second main magnetic coils, third main magnetic coils, and shielding coils. The five pairs of coils are symmetric about the center. The shim coils are arranged closest to the center point; the first main magnetic coils, the second main magnetic coils, the third main magnetic coils, and the shielding coils are arranged in sequence outside. The first main magnetic coils are connected with reverse current. The second and third main magnetic coils are connected with positive current for providing the main magnetic field strength. The shim coils are connected with positive current for compensating the magnetic field in the central region. The shielding coils are connected with reverse current for creating a magnetic field opposite to the main magnetic field for compensating the stray magnetic field in the space.

Abstract: A superconducting magnet system for high power microwave source focusing and cyclotron electronic apparatus is provided, wherein, the superconducting magnet comprises an inner superconducting main coil, an outer superconducting main coil, two end compensation coils, a regulating coil and a central regulating coil. These coils are formed by coiling Nb3Sn/Cu superconducting wire. The superconducting magnet can operate off-line through solid nitrogen formed by a cryocooler and high-pressure nitrogen. The superconducting magnet and the superconducting switch constitute a closed loop, thereby achieving magnetic field stability, without outside electromagnetic interference. The superconducting magnet system can provide a magnetic field having special spatial distribution and high stability.

Abstract: A device and a method for inhibiting vibration of a superconducting magnetic suspension rotor. The device comprises a rotor cavity housing, lateral coils, a superconducting rotor with a rotor top plane, a copper plate, pole shoes, a z-axial vibration measuring sensor, an x-axial vibration measuring sensor, a y-axial vibration measuring sensor, and a copper ring, the pole shoes having a spherical inner surface and being arranged symmetrically up and down so as to form a rotor cavity; the annular lateral coils being closely adjacent to an outside cylindrical surface of the rotor cavity housing and fixed to the same; the z-axial vibration measuring sensor being fixed to a central region of the copper plate; the x-axial vibration measuring sensor being mounted along an x-coordinate axis and the y-axial vibration measuring sensor mounted on a on the copper ring which is mounted along an equatorial plane of the rotor.

Abstract: A high magnetic field superconducting magnet system with large crossing warm bore is disclosed, a superconducting coil thereof includes a low temperature superconducting coil and a high temperature superconducting coil. The superconducting coils are connected to a thermal shield and a flange of a low temperature container by a supporting drawbar, thus the superconducting coils as a whole are supported inside the low temperature container. A thermal switch is connected to a primary cold head and a secondary cold head of the cryocooler. The secondary cold head of the cryocooler is connected to a magnet-reinforced supporting flange at the two ends of the low temperature superconducting coil and the high temperature superconducting coil by a cold conduction strip. The superconducting magnet system has a room temperature bore in horizontal direction and a room temperature bore in vertical direction.

Abstract: A high magnetic field superconducting magnet system with large crossing warm bore is disclosed, a superconducting coil thereof includes a low temperature superconducting coil and a high temperature superconducting coil. The superconducting coils are connected to a thermal shield and a flange of a low temperature container by a supporting drawbar, thus the superconducting coils as a whole are supported inside the low temperature container. A thermal switch is connected to a primary cold head and a secondary cold head of the cryocooler. The secondary cold head of the cryocooler is connected to a magnet-reinforced supporting flange at the two ends of the low temperature superconducting coil and the high temperature superconducting coil by a cold conduction strip. The superconducting magnet system has a room temperature bore in horizontal direction and a room temperature bore in vertical direction.

Abstract: A low resistance superconducting joint with high shielding characteristics, manufactured by: corroding copper on the outer surface at the end of a NbTi/Cu superconducting wire to form terminal NbTi superconducting filaments; inserting same number of NbTi superconducting filaments into each through hole of the niobium layer of a Nb/NbTi/Cu multilayer composite rod; pressing at the outside of the Nb/NbTi/Cu multilayer composite rod to combine the Nb/NbTi/Cu multilayer composite rod and NbTi superconducting filaments together to form a joint; and inserting the joint into a YBCO tube, and then filling the YBCO tube with molten bismuth-lead-tin-cadmium (BiPbSnCd) alloy solder to form a superconducting joint with high shielding and low resistance characteristics.

Abstract: A superconducting magnet system for high power microwave source focusing and cyclotron electronic apparatus is provided, wherein, the superconducting magnet comprises an inner superconducting main coil, an outer superconducting main coil, two end compensation coils, a regulating coil and a central regulating coil. These coils are formed by coiling Nb3Sn/Cu superconducting wire. The superconducting magnet can operate off-line through solid nitrogen formed by a cryocooler and high-pressure nitrogen. The superconducting magnet and the superconducting switch constitute a closed loop, thereby achieving magnetic field stability, without outside electromagnetic interference. The superconducting magnet system can provide a magnetic field having special spatial distribution and high stability.

Abstract: A superconducting magnet system for generating high homogeneity and high magnetic field consists of a main coil, an outer coil, a quench protection circuit, a quench heater and a power supply. The main coil is composed of many concentric solenoid coils which are arranged from inside to outside. The outer coil out of the main coil includes a first back roll coil, a second back roll coil, a first superconducting coil for compensating sixth harmonic component, a second superconducting coil for compensating sixth harmonic component, a shielding ring and a shielding coil from inside to outside. Every loop circuit of the quench protection circuit is composed of a corresponding protection resistor, a diode and coil which is connected in series each other, and each coil has a corresponding quench protection heater. The classification linear diameter difference of the superconducting coils which contact each other in main coil is less than 0.05 mm.

Abstract: A braille printing device is disclosed. The device comprises a paper picking-up mechanism, a paper feeding mechanism, a printing mechanism, a curing light source (8) and a paper discharging mechanism. The paper picking-up mechanism, the printing mechanism, the curing light source and the paper discharging mechanism are arranged above a base (6) in turn. The paper feeding mechanism is installed in an X-direction guide on the base (6) and moves to and fro along the X-direction guide under the paper picking-up mechanism, the printing mechanism, the curing light source (8) and the paper discharging mechanism. The printing mechanism is fixed to two posts (16) at two sides of the middle of the base (6). The curing light source (8) and a glue jet valve (10) of the printing mechanism are disposed at two sides of the posts (16) respectively. Electromagnetic clamps (7) of the paper discharging mechanism are mounted at the end of the base (6). The device can simultaneously perform printing and curing operations.

Abstract: A superconducting magnet system for generating high homogeneity and high magnetic field consists of a main coil, an outer coil, a quench protection circuit, a quench heater and a power supply. The main coil is composed of many concentric solenoid coils which are arranged from inside to outside. The outer coil out of the main coil includes a first back roll coil, a second back roll coil, a first superconducting coil for compensating sixth harmonic component, a second superconducting coil for compensating sixth harmonic component, a shielding ring and a shielding coil from inside to outside. Every loop circuit of the quench protection circuit is composed of a corresponding protection resistor, a diode and coil which is connected in series each other, and each coil has a corresponding quench protection heater. The classification linear diameter difference of the superconducting coils which contact each other in main coil is less than 0.05 mm.

Abstract: This is an evaporative cooling electromagnetic separator. It includes a shell and an iron core installed inside the shell. A set of wire coil is winded around the iron core. Inside the shell is cooling medium, which is evaporative cooling medium or mixture of evaporative cooling medium and transformer oil. A condenser is installed on the top of the shell. On one side of the condenser is a steam gathering pipe, which joints with the shell from its top, and on the other side of the condenser is a liquid gathering pipe, which connects with the shell from its flank. The present invention will help to enhance the security, reliability and cooling capability of the electromagnetic separator, and possesses broad application perspective.