WE-IVC-6X-300MT
Coil Array – Water-Cooled, In-Vacuum
In-Vacuum High-Field Generation for Fusion Plasma & Beam Applications
Woodruff Engineering’s In-Vacuum Coil Array System delivers 0.3 Tesla magnetic field generation within ultra-high vacuum environments, making it ideally suited for fusion plasma confinement research, neutral beam ion source development, and vacuum-compatible diagnostic systems where direct magnetic field coupling to plasma or high-energy particle beams is essential. Built around six water-cooled copper coil assemblies with welded stainless steel 301 vacuum-compatible forms, the system generates highly stable magnetic fields from individually controlled coil sections while maintaining vacuum integrity under pulsed high-current operation. Each coil features 92 precision-wound turns of square copper conductor with internal 6mm diameter cooling channels, rated for 800 amperes per turn to achieve the full 300 mT field strength required for plasma shaping, beam steering, and magnetic confinement experiments where external field coils cannot provide sufficient coupling or where space constraints demand in-vessel field generation.
Technical Specifications
0.3 Tesla
Field Strength per Coil
< 0.5% ∆
Field Stability
≤ 10⁻⁸ Torr
UHV-Rated
800 A
Operating Current
The WE-IVC-6X-300MT is designed from the ground up for the demanding requirements of fusion energy research and advanced physics applications. This robust coil array is built to withstand ultra-high vacuum environments. Powerful liquid cooling allows stable and uniform field generation over long time scales. Configurable coil spacing gives you full control over field characteristics. View our comprehensive spec sheet below or send us a message to find out how we can magnetize your project.
Key Features
Ultra-High Vacuum Compatibility
All-welded stainless steel 301 construction with vacuum-qualified materials achieves ≤10⁻⁸ Torr operation. Electropolished surfaces and low-outgassing insulation ensure compatibility with fusion plasma vessels, ion sources, and particle beam vacuum systems.
High-Field Generation
0.3 Tesla (3000 Gauss) per coil with 92 precision-wound turns carrying 800 amperes per turn. Total 76.8 kA per coil enables strong magnetic field generation for plasma confinement, beam steering, and diagnostic applications requiring in-vacuum field coupling.
Integrated Internal Cooling
Square copper conductors with 6mm internal water cooling channels provide direct thermal management of high-current windings. Parallel cooling manifold architecture enables independent thermal control of each coil while series electrical connection simplifies power delivery and reduces vacuum feedthrough count.
Field Configuration Flexibility
Coil spacing adjustable from direct contact (zero separation) to Helmholtz configuration (separation = radius) enables uniform field zones, gradient fields, or custom magnetic topologies. Mechanical design accommodates reconfiguration for different experimental requirements while maintaining structural integrity under Lorentz forces.
Lorentz Force Management
Structural design validated for operation from zero coil separation to Helmholtz configuration. Inter-coil bracing distributes attractive and repulsive forces across the array, while welded stainless construction provides mechanical rigidity under worst-case Lorentz loads during pulsed high-current operation
Series-Parallel Hybrid Architecture
Series electrical connection of six coils requires only a single 800A power supply and minimizes high-current vacuum feedthroughs (critical for leak-free UHV operation). Parallel water cooling ensures balanced thermal management across all coils, preventing hot spots and thermal drift during extended operation.
Why Choose THE WE-IVC-6X-300MT?
CUSTOM-MADE • At Woodruff Engineering, we work with you to design a coil array perfectly suited to your needs.
HIGHLY CONFIGURABLE • Adjustable coil positions and customizable dimensions give you the precise field control you need. Control coils individually or in parallel depending on your application.
RELIABLE PERFORMANCE • Our water-cooled coil arrays are built to last. Even after thousands of thermal cycles, your array will continue to generate a precise, uniform field.
LARGE-VOLUME WORKING FIELD • Ideal for testing full-scale components that smaller systems simply can’t accommodate.
ULTRA-HIGH VACUUM • We build our coil arrays with materials and processes specifically for UHV exposure, ensuring compatibility with fusion plasma vessels, ion sources, and particle beam vacuum systems.
Target Applications
Diagnostic Calibration & Component Testing
High field strength (0.2-0.3 T) enables magnetic diagnostic calibration, neutral beam ion source development, and plasma-facing component exposure testing. Compact size allows benchtop integration or small vacuum chamber installation for R&D laboratories and university tokamak programs.
Research Tokamak Auxiliaries
Moderate field strength (0.1-0.15 T) suitable for university and mid-size tokamak fringe field generation, FRC formation coils, and edge field control. Weight range (350-900 kg) allows crane installation without requiring specialized heavy-lift equipment.
Major Tokamak Correction & Control
Field strengths (0.05-0.08 T) optimized for error field correction, plasma position control, and resistive wall mode stabilization in large tokamaks (DIII-D class and above). Weight range (1.5-5.5 tons) requires facility crane infrastructure but remains manageable for installation in existing vessels.
ITER-Class In-Vessel Coils
Field strengths (0.03-0.04 T) designed for in-vessel correction coil systems in ITER, JT-60SA, and DEMO program devices. Weight range (8.5-16.5 tons) requires dedicated installation procedures and vacuum vessel modifications for integration. Lead times reflect extensive engineering, FEA validation, and mock-up testing.
Commercial Fusion Reactor Scale
Field strengths (0.02-0.025 T) represent the practical limit for in-vacuum coil systems at commercial fusion power plant scale. Weight range (22-35 tons) requires specialized installation equipment and facility modifications. These systems are custom-engineered for specific fusion reactor designs and require extensive collaboration with facility engineering teams.
Other Scientific Applications
Magnets are our specialty. We’ve built them for many industries and applications – too many to list here! Contact our engineering team using the form below to discuss your project’s requirements. We work with you to design and build a custom coil array to meet your needs.