A5056467557- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Physics of Superconductivity and Magnetism
- Magnetic confinement fusion research
- Advanced Algorithms and Applications
- Spacecraft and Cryogenic Technologies
- Magnetic Properties and Applications
- Frequency Control in Power Systems
- Antenna Design and Optimization
- Gyrotron and Vacuum Electronics Research
- Electromagnetic Launch and Propulsion Technology
- Electromagnetic Compatibility and Measurements
- Advanced Mathematical Modeling in Engineering
- Advanced Sensor and Control Systems
- Advancements in Photolithography Techniques
- Industrial Technology and Control Systems
- Advanced X-ray Imaging Techniques
- Minerals Flotation and Separation Techniques
- Distributed and Parallel Computing Systems
- Antenna Design and Analysis
- Superconductivity in MgB2 and Alloys
Huazhong University of Science and Technology
2022-2024
Wuhan National Laboratory for Optoelectronics
2022-2023
Jilin Electric Power Research Institute (China)
2021
Supercon (United States)
1992-1994
Superconducting Systems (United States)
1994
Fermi National Accelerator Laboratory
1993
Superconductor Technologies (United States)
1992
Abstract No-insulation (NI) REBCO ((RE)Ba2Cu3Oy (RE = Rare Earth)) magnets show great potential in producing ultra-high magnetic field due to their excellent self-protection behaviors, high current density, and compact structure. However, the complexity of fabrication process, along with intrinsic screening induced coated layer, poses challenges for large-scale applications. The not only generates an unwanted irregular overstress, but also leads a non-uniform distribution within winding,...
Passive shimming technology can make the uniformity of diameter spherical volume (DSV) region magnetic resonance imaging (MRI) system meet requirements. In this article, we introduce dichotomy method to improve optimal target field (OTMF) algorithm, so that it quickly get minimum sheet laying scheme under lowest inhomogeneity and greatly reduce iteration time. Based on improved OTMF algorithm by dichotomy, article continues study influence number trays, pockets in each tray, size pieces,...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation A. Devred, T. Bush, R. Coombes, J. DiMarco, C. Goodzeit, Kuzminski, M. Puglisi, P. Radusewicz, Sanger, Schermer, G. Spigo, Thompkins, Turner, Z. Wolf, Y. Yu, H. Zheng, Ogitsu, Anerella, Cottingham, Ganetis, Garber, Ghosh, Greene, Gupta, Herrera, S. Kahn, E. Kelly, Meade, Morgan, Muratore, Prodell, Rehak,...
This paper presents a quench protection design of head-only 1.5 T MRI superconducting magnet with bath-cooling in Wuhan National High Magnetic Field Center (WHMFC). The consists 9 coaxial solenoid coils fabricated NbTi wire copper to non-copper ratio 8. It operates at around 510A total storage energy 0.59 MJ. A passive circuit heater network is employed protect the from damage during event. set diodes and network. diode assembly composed two groups connected series then reverse-parallel. 18...
Abstract A superconducting magnet system is developed for the application of high-frequency gyrotrons at Wuhan National High Magnetic Field Center, China. The operating cost dominated by refrigeration power. To reduce heat load cryogenic systems, a pair YBCO binary current leads designed consideration industrial concentration type II high-temperature material. In this paper, simulation model proposed to perform electromagnetic-thermal coupling analysis these under different conditions...
This paper presentsa new hybrid global optimization method to design a 25 T All YBCO solenoid superconducting magnet with warm-bore diameter of 52 mm for high-frequency gyrotrons in Wuhan National High Magnetic Field Center, China. includes 3 main routines: linear programming (LP) code get the non-rectangular coil design, coil-picking rectangular and nonlinear (NLP) final integer by using as initial input. The designed Inner, Middle Outer coils which consist 34, 56 68 double pancakes (DP)...
The quench performance and ramp rate sensitivity of 18 5-cm-aperture, 15-m-long Superconducting Super Collider (SSC) dipole magnet prototypes are discussed. All the magnets appear to reach a plateau near their extrapolated short sample current limit well in excess operating with very little training. Most magnets, however, exhibit dramatic degradation as function rate, which, for most part, can be attributed large cable eddy currents.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Eighteen 5-cm-aperture, 15-m-long Superconducting Super Collider (SSC) dipole magnet prototypes have been produced and cold tested. On each prototype, the dependence of harmonic field coefficients on magnetic current was measured as part a study quality. For most magnets, observed behavior conforms to what can be expected from effects persistent magnetization currents iron yoke saturation. A few prototypes, however, exhibited anomalies during ramp at 4 A/s which attributed large cable eddy...
Tests have recently been performed at Fermilab in order to measure the energy losses due eddy currents and iron superconductor magnetization. These measurements were on six 1.5-m-long model magnets eight 15-m-long full-scale collider dipole magnets. AC measured as a function of ramp rate using sawtooth ramps from 500 5000 A for both types magnets, while bipolar studies additionally some short The magnet voltage current complete cycle digitally integrated yield loss per cycle. Measurement...
A systematic series of measurements the time decay sextupole component magnetic field in a full-length SSC (Superconducting Super Collider) dipole magnet prototype was carried out order to characterize mechanisms involved. At least two have been isolated. The first is slow logarithmic which independent excitation history magnet. This stopped by decrease temperature and identified with flux creep. second component, not yet fully understood, only appears when pre-cycled high level current,...
A 1.5 T head-only magnetic resonance imaging (MRI) superconducting magnet with liquid helium (LHe) bath-cooling using NbTi wire has been designed and is being constructed in Wuhan National High Magnetic Field Center (WHMFC). The consists of 9 discretized coils, including five main coils two bucking wound on separate stainless steel 304 formers. to operate at 510 a peak field below 3.0 T, load line controlled 50%, temperature margin above 1 K. It critical accurately evaluate the thermal...
This paper presents the operation test results of a new type YBCO binary current leads with cryostat designed for no-insulation (NI) REBCO magnet at Wuhan National High Magnetic Field Center (WHMFC). Multi-physical signals including current, voltage, temperature, pressure, and liquid helium level from are recorded through data acquisition software developed by Labview. The is composed cooling, vaporizing, charging processes. have been introduced analyzed, which show that tapes can enter into...
The authors summarize the mechanical performance of most recent 5-cm-aperture, 15-m-long SSC dipole magnet prototypes. magnets were produced at Brookhaven National Laboratory (BNL) and Fermi Accelerator (FNAL) under contract with Superconducting Super Collider (SSCL). BNL rely on a horizontally split yoke collared ends, while FNAL vertically collet-style end clamps. Magnets both designs are equipped strain gauges enabling measurement azimuthal pressures exerted by coils against collar poles...
Magnetic field measurements have been made on twelve 17-m-long, 40-mm-aperture R&D superconducting dipoles. Data dipole strength, multipole coefficients, and alignment obtained. The data indicate that the magnets as built are generally within expectations for this design.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Eleven 17-m-long, 40-mm-aperture SSC (Superconducting Super Collider) R&D superconducting collider dipole magnets, built at BNL (Brookhaven National Laboratory), have been extensively tested and Fermilab during 1990-1. Quench performance of these magnets details their mechanical behavior are presented. Although the quench most recent shows slightly more quenches than expected, there is now a better understanding magnets. The baseline design leads to reasonable performance. DC series seems...
This paper describes a design of Vertical-ring High Gradient Superconducting Magnetic Separation (VHGMS) system for recovery the magnetic ore and purification non-metallic minerals. Compared to conventional which uses copper wires, using superconducting magnet can help reduce energy consumption increase field. The first part this introduces operation margin magnet. is wound with NbTi wires its temperature designed be higher than 1 K. It generates an average field above 2 T in filtering area....