MAGNETIC PLASMA SHAPING · FUSION
ENERGY · STELLARATOR R&D
Current fusion R&D program
Explore a broader stellarator operating window.
We are developing a magnetic plasma-shaping concept for stellarator research. Current work examines whether localized external magnetic actuation can influence plasma flow, density profiles and transport without placing solid actuators inside the plasma. The near-term goal is to verify equilibrium compatibility, quantify the response and define direct validation tests.
DESC & VMEC++ equilibrium calculations ready for review
Simulation → linear test → curved-field validation
European research consortium building
Magnetic plasma shaping · stellarator integration
CORE IDEA
Localized magnetic shaping
We are testing whether external magnetic perturbations can create measurable changes in plasma flow, density profiles or transport without adding solid structures inside the plasma.
CURRENT STAGE
Simulation-led and validation focused
DESC and VMEC++ equilibrium calculations are ready for review, followed by transport analysis and staged validation.
CURRENT FOCUSFusion R&D · Magnetic plasma shaping
Flowmeasure local plasma response
Profilestrack density & pressure response
Transportquantify beneficial, neutral or adverse effects
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CURRENT PROGRAM
From equilibrium compatibility to measurable plasma-response tests.
Our focus is to establish three-dimensional equilibrium compatibility and determine whether a localized magnetic perturbation produces a measurable, reproducible plasma response.
Magnetic plasma shaping
Stellarator equilibrium, plasma response and staged validation.
DESC & VMEC++ review
Three-dimensional consistency, assumptions and operating bounds.
From model to test
Observable targets, null comparison and staged experimental checks.
Define a stellarator-relevant reference case with documented inputs and engineering bounds.
The reference case uses a several-metre-class stellarator geometry and parameter ranges comparable with published experimental practice. It is designed to test equilibrium compatibility and actuator requirements without assuming reactor conditions or extreme localized power.
A useful modeled regime would guide the next transport and engineering studies. Any later scaling claim must come from explicit confinement, power-balance and actuator assumptions.
Treat local shaping as a perturbation within established MHD and transport physics.
Our point of view at this stage is that local magnetic shaping should be evaluated inside the standard MHD and transport framework. We are studying whether a controlled perturbation can produce a useful plasma response while the stellarator equilibrium remains the primary confinement system.
Our goal is to map where the response is beneficial, neutral or adverse and connect those observations to equilibrium, transport and engineering limits before making device-level claims.
DESC & VMEC++ equilibrium calculations are ready for technical review.
The current simulation package is ready for review of three-dimensional equilibrium consistency and of the assumptions used to represent the local magnetic perturbation. The next step is to connect that work to transport analysis, actuator requirements and measurable observables.
Linear testbed → curved-field validation → stellarator-relevant integration.
Development progresses from lower-complexity experiments to more realistic magnetic geometries. A linear test isolates the local response, a curved-field configuration adds geometric effects, and later integration is considered only if the response remains reproducible and equilibrium-compatible.
MAGNETIC PLASMA SHAPING
A local magnetic perturbation studied inside a full stellarator equilibrium.
We are studying localized external magnetic actuation within stellarator-relevant configurations. The present objective is to determine whether the perturbation can change measurable plasma quantities without degrading equilibrium quality or creating impractical actuator requirements.
Measure whether local magnetic actuation changes plasma flow.
The first task is to quantify the sign, magnitude and spatial extent of any flow response relative to a controlled baseline, rather than assume that the response improves confinement.
- External magnetic actuation
- Baseline comparison
- Diagnostic observability
Track density and pressure response without assuming direct control.
We measure whether the applied magnetic perturbation changes local density or pressure profiles and whether those changes are consistent across diagnostics and repeated operating points.
Measure the transport response before assigning a benefit.
Fluctuation levels, profile changes and transport proxies are compared between baseline and shaped operation to determine whether the effect is beneficial, neutral or adverse.
Keep the perturbation compatible with the three-dimensional equilibrium.
Equilibrium calculations are used as an early gate: operating points that require unrealistic fields or degrade the modeled configuration do not move forward.
Vary the applied field systematically and preserve a clear baseline.
Independent actuation supports controlled parameter scans, sensitivity analysis and direct comparison between unperturbed and perturbed plasma states.
Identify where the response is useful, negligible or detrimental.
Only after the response is mapped against equilibrium, transport and actuator limits do we evaluate whether the concept justifies larger-scale integration.
SIMULATION & REVIEW
DESC and VMEC++ equilibrium calculations are the current technical review milestone.
Our immediate objective is to review the three-dimensional equilibrium calculations and use them to define the next transport, engineering and actuator studies. Equilibrium compatibility is a necessary first step, not evidence of improved confinement by itself.
CURRENT REVIEW MILESTONEDESC + VMEC++
Comparative three-dimensional equilibrium calculations ready for review.
The current package is intended to assess equilibrium consistency, boundary and profile assumptions, and representation of the applied magnetic perturbation. Transport response is evaluated separately.
REFERENCE REGIMENear-term target
Define a stellarator-relevant case with traceable assumptions.
The reference regime uses documented geometry, profiles, magnetic-field levels and actuator limits to establish a reviewable case for transport analysis and experimental follow-up.
NEXT ANALYSIS LAYERTransport + engineering
Move from equilibrium to transport and actuator requirements.
After equilibrium review, the next layer is transport analysis, sensitivity studies and engineering limits. Confinement improvement is treated as a result to be demonstrated, not an input.
FROM MODEL TO TESTEvidence-led
Define observables, uncertainties and a null comparison before testing.
Each predicted effect is translated into a measurable quantity with an expected range, diagnostic method and baseline case so the experiment can confirm, limit or reject the modeled response.
Our point of view at this stage: equilibrium compatibility is necessary but not sufficient. The key question is whether a localized magnetic perturbation produces a measurable and reproducible plasma response after transport effects, actuator limits and diagnostic uncertainty are included. Our sequence is equilibrium review → transport analysis → linear test → curved-field validation → stellarator-relevant integration.
ENGINEERING STACK
Plasma physics, magnets, materials, vacuum, diagnostics and control must work as one system.
Set actuator requirements from the physics case, not the other way around.
Coil geometry, current range, bandwidth, stresses, cooling and power electronics are derived from the field perturbation required by the modeled and measured plasma response.
Design for heat, erosion and cyclic stress.
Plasma-facing materials, structural alloys, active cooling and maintainability must be evaluated together with the magnetic design so local shaping does not create unacceptable thermal or mechanical penalties.
Protect confinement from contamination and radiative losses.
Wall conditioning, pumping, material selection and direct monitoring of radiative losses help distinguish a real confinement benefit from an artifact caused by changing plasma purity.
Measure the response with independent diagnostics.
Density, temperature, flow, fluctuations, magnetic response, radiation and plasma position are measured with enough time resolution to compare baseline and shaped operation directly.
Start with deterministic control and a measured response map.
Initial control logic should remain transparent and physics-based. More advanced or data-driven control is considered only after actuator response, latency and plasma sensitivity are characterized.
Close the loop between simulation, hardware limits and experiment.
Electromagnetic, thermal, structural and plasma models are progressively linked so design choices can be tested against realistic actuator ceilings and experimental measurements.
SIMULATION & DIGITAL VALIDATION
Separate current calculations from planned analysis.
STELLARATOR INTEGRATION
Local magnetic actuation must remain compatible with the host equilibrium.
The stellarator magnetic configuration remains the primary confinement system. We study the local perturbation as an additional actuator whose effect must be evaluated against equilibrium quality, transport, coil geometry, access and power limits.
3D EQUILIBRIUM COMPATIBILITY
The perturbation must fit the stellarator equilibrium before performance is discussed.
Equilibrium firstCompare the perturbed and unperturbed three-dimensional equilibria under the same documented assumptions.
Transport secondEvaluate neoclassical and turbulent transport before interpreting an equilibrium change as a confinement benefit.
Engineering ceilingCoil current, bandwidth, heating, stresses, ports and diagnostic access define the practical envelope.
REFERENCE REGIME
Use a stellarator-relevant case with explicit physics and engineering bounds.
Traceable inputsDocument geometry, profiles, field strength and boundary assumptions used in every comparison.
Realistic actuationKeep field strength, power, bandwidth and thermal loads inside a plausible engineering range.
Performance from evidenceConfinement or transport benefit is quantified from analysis or measurement rather than prescribed as an input.
Reviewable evidenceExpose assumptions, uncertainties and failure criteria clearly enough for independent technical review.
VALIDATION ROADMAP
Equilibrium review, transport analysis, controlled plasma tests, then stellarator-relevant integration.
Equilibrium review
Review DESC / VMEC++ calculations, assumptions and cross-code consistency before using them to define later transport or hardware studies.
Transport & sensitivity
Evaluate whether the modeled perturbation is expected to create a measurable transport response and identify the parameters that dominate the result.
Controlled plasma test
Use a linear or curved-field test configuration with a clear unperturbed baseline, sufficient diagnostics and predefined uncertainty limits.
Stellarator-relevant integration
Consider larger integration only if the local effect remains reproducible, transport-consistent and compatible with realistic stellarator engineering limits.
EARLY VALIDATION CRITERIA
Define the decision rule before the experiment.
Each stage needs a baseline, an expected effect size, an uncertainty budget and a criterion for stopping or moving forward.
Effect sizeReport the measured change together with uncertainty, not only whether the trend points in the desired direction.
Baseline / null caseCompare shaped operation against matched unperturbed conditions and known diagnostic variation.
Cross-diagnostic consistencyRequire density, temperature, flow, fluctuation and radiation measurements to tell a physically consistent story.
ReproducibilityRepeat the result across shots and parameter scans before using it to justify a larger experiment.
EUROPEAN RESEARCH CONSORTIUM
Building the interdisciplinary team for the next validation milestone.
OUR NEXT STEP
Expanding a consortium around a testable plasma-physics question.
EIC Pathfinder supports early-stage, high-risk/high-gain research with grants. A core consortium is in place, and the next step is to add partners who strengthen equilibrium and transport analysis, magnetic engineering, diagnostics and experimental validation.
3D equilibrium & transport reviewExpert review of DESC / VMEC++ results, followed by neoclassical and gyrokinetic transport analysis.
Plasma physics & MHDEquilibrium, turbulence, stability, profile evolution and experimental interpretation.
Magnets, power electronics & controlsMagnetic actuator design, fast drive electronics, superconducting pathways and low-latency feedback.
Materials, vacuum & thermal engineeringPlasma-facing materials, cooling, pumping, erosion, fatigue and impurity control.
Diagnostics & experimental accessFacilities and instrumentation capable of testing magnetic shaping, plasma flow, turbulence and stellarator integration.
HOW WE WORK
Physics, engineering and validation move together.
3D equilibrium firstWe start from a stellarator-relevant magnetic configuration and evaluate local shaping inside that full geometry.
Transport nextConfinement, turbulence and plasma response are connected to equilibrium before selecting the next operating point.
Engineering from day oneMagnets, power electronics, materials, cooling, diagnostics and access are developed alongside the plasma model.
Evidence before scale-upEach larger step depends on a reproducible response, a consistent transport interpretation and realistic actuator requirements.
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