Single-Turn High-Field Magnet Structure for Repetitive Pulsing
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Solution Overview
Problem
Existing high-field magnet technologies are not suitable for repetitively pulsing intense magnetic fields due to coil deformation and motion during pulses, leading to component failure and instability in plasma confinement and acceleration systems.
Innovation Solution
A non-destructive, single-turn magnetic coil design with low inductance is developed, featuring a solid core with a cavity and support structures to restrain outward motion, allowing for repeated production of intense magnetic fields up to 50 Tesla without replacing the core, with a radial thickness configuration to sustain at least 1,000 pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional multi-turn coils are used to generate intense magnetic fields, then the magnetic field strength is improved, but the coil deformation and motion during pulses worsen, leading to component failure
Solution Approach 1:
The coil is divided into discrete turns with independent support structures, allowing each turn to be restrained separately. This segmentation enables the support structures to effectively counteract magnetic pressures without causing overall coil deformation, resolving the contradiction between achieving high magnetic field strength and maintaining component stability during pulsing operations
Solution Approach 2:
Support structures are pre-installed and positioned to restrain coil turns before the magnetic field pulse is applied. These structures are designed in advance to counteract the expected outward magnetic pressure, preventing coil deformation and motion during the pulse, thus maintaining both high magnetic field strength and component reliability
2Illumination intensity
If high electrical currents are delivered to generate intense magnetic fields, then the magnetic field peak value is improved, but the magnetic pressure on the core worsens, causing outward motion and potential failure
Solution Approach 1:
Support structures are designed to provide counteracting forces against the outward magnetic pressure generated by high electrical currents. These structures act as mechanical counterweights that balance the intense magnetic pressure, enabling the system to achieve high magnetic field peak values (10-50 Tesla) while preventing core deformation and failure through repeated pulsing
3Duration of action of stationary object
If the core is designed to withstand high magnetic pressure, then the durability is improved, but the radial thickness increases, leading to larger device size
Solution Approach 1:
The core support function is segmented between the core itself and separate support structures. This allows the core to maintain a reasonable radial thickness for electrical performance while the support structures provide the additional mechanical strength needed to withstand high magnetic pressure, achieving both durability (1,000+ pulses) and compact device size without excessive radial thickness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves repeated generation of intense magnetic fields with peak values between 10 to 50 Tesla, extending the lifespan of the magnetic coil assembly and preventing component failure, enabling thousands of firings without replacement, and maintaining stress below the yield strength of the materials used.
Implementation Method 1
a pulse of electrical current delivered to the core to create a magnetic field in the cavity
Implementation Method 2
magnetic pressure on the core resulting from a pulse of electrical current delivered to the core to create a magnetic field in the cavity
Data Source
AI summary
A single-turn coil and supporting structure for producing intense magnetic fields are described. Magnetic field and mechanical stress analyses aid in designing a magnetic coil assembly that can produce peak magnetic fields in excess of 10 Tesla in large cavities for more than 1,000 pulses.