Open research questions in Magnetic confinement fusion research
110 gap statements mined from Magnetic confinement fusion research papers in our 4.5M-paper local library, which holds 1,992 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.
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What the literature leaves open
Pure Ne seeding leads to a narrow operational window constrained by core impurity accumulation and H-mode to L-mode back transitions, while pure solid B injection (SBI) is insufficient for effective divertor cooling.
Simultaneous ELM suppression and divertor detachment via synergistic boron powder and neon injection in EAST · 2026 · DOIThe study discusses the need for shielding against neutron and γ-ray irradiation.
The study suggests future research on the development of CO2 laser interferometers for electron density measurements. The study recommends further study on the operation of the interferometers in harsh radiation environments. The study proposes the application of the interferometers to future fusion reactors.
The lack of understanding of the stationarity, ergodicity, and time-symmetry of test-particle dynamics. The development of accurate models of plasma behavior.
The study is limited to the Cyclone Base Case. The simulations assume a specific initial distribution of particles. The study does not consider other physical regimes.
Heat conduction in weakly collisional, magnetised plasma is challenging to model accurately. Experimental constraints are needed to improve understanding of thermal transport.
Design of experiments characterising heat conduction in magnetised, weakly collisional plasma · 2026 · DOIThe majority of negative structures resulting from data pre-processing are artefacts. The analysis is limited to a single L-mode discharge. The high acquisition rate of the camera is only possible due to the simplicity of the optical system.
Comparative blobs and holes dynamics in a tokamak plasma: deep learning analysis of fast imaging data · 2026Further study of the dynamics of blobs and holes is needed. The development of new plasma control strategies based on the findings of this paper. The application of deep learning analysis to other plasma physics problems.
Comparative blobs and holes dynamics in a tokamak plasma: deep learning analysis of fast imaging data · 2026Future research should focus on addressing the limitations identified in the study. Thermal management and low-thrust trajectory integration should be prioritized. Reconnection valve controllability and structure-pulse coupling should be investigated.
Prior work has focused on momentum-only models, neglecting energy sources. The gap is addressed by deriving a thrust formula from energy conservation and momentum theory.
Transient broadening of the SOL density profile can modify main-chamber first-wall particle fluxes and divertor loading, yet its control parameters remain debated between divertor-regime transitions, neutral dynamics and changes in cross-field transport.
Post-puff SOL broadening on MAST-U under high-recycling conditions: evidence consistent with cross-field transport changes · 2026 · DOIFuture research should focus on improving the understanding of the EGAM frequency transition. The development of new devices and the improvement of existing devices require a better understanding of energetic particle driven instabilities.
There is a need for better understanding of the EGAM frequency transition. Previous research has made significant progress, but there are still gaps in our understanding.
These results were largely consistent with previous works concerning FPP-relevant plasma conditions and provide a model for the plasma conditions that should be studied in SPARC to improve ARC projections.
The need for a commercially viable fusion power plant. The lack of understanding of key model uncertainties and physics risks in fusion power plant design.
The need to simulate the core and scrape-off layer simultaneously. The need to improve the accuracy and efficiency of tokamak simulations.
Constructing field-aligned coordinate systems for gyrokinetic simulations of tokamaks in X-point geometries · 2026 · DOIWhile our wavenumber-conditioned architecture leverages physics structure through wavenumber decomposition, the current implementation does not explicitly enforce fundamental conservation laws (energy, momentum, particle conservation) as hard constraints in the neural network architecture.
TGLF-WINN: Data-efficient deep learning surrogate for turbulent transport modeling in fusion · 2026 · DOIThe QITE Core SDK itself remains proprietary. The paper does not discuss the scalability of the QITE policy to larger plasma control problems.
Quantum-Inspired Thermal Equilibrium: Integration of Collective Dynamics into Real-Time Stabilization of Magnetically Confined Fusion Plasmas — Extended Edition with External Validation on the Gym-TORAX Reinforcement-Learning Environment · 2026 · DOITo investigate the scalability and robustness of the QITE policy.
Quantum-Inspired Thermal Equilibrium: Integration of Collective Dynamics into Real-Time Stabilization of Magnetically Confined Fusion Plasmas — Extended Edition with External Validation on the Gym-TORAX Reinforcement-Learning Environment · 2026 · DOIThe KDMC method breaks some assumptions in Eiron's domain-decomposition algorithm, - The method is limited to a single domain, - The simulation is performed in a two-dimensional setting, - The test-case is a two-dimensional slab with ionizing…
Extending the KDMC method to multiple domains, - Improving the parallelization strategies for KDMC simulations, - Applying the KDMC method to more complex geometries, - Investigating the convergence rate of KDMC simulations in different…
Experimental verification of the results. Investigation of the effects of almost-rational q values on turbulent momentum transport in different tokamak configurations.
The need to avoid large type-I edge-localised modes (ELMs), - The requirement for experimental validation on SPARC, - The potential impact of magnetic and first-wall geometry on detachment stability, impurity enrichment and neutral…
Experiments on SPARC to select an integrated scenario which avoids or mitigates type-I-ELMs, - Finalisation of ARC’s divertor design by studying the impact of magnetic and first-wall geometry on detachment stability, impurity enrichment and neutral baffling, - Investigation of the benefits of total flux expansion and baffling for stabilising a detachment…
Calculation of non-Maxwellian distribution of heated particles with fast-ion tails, - Power redistribution during slowing down of heated particles, - Future ARC design iterations to address the difference in separatrix…
Most-cited papers in Magnetic confinement fusion research
- Magnetic control of tokamak plasmas through deep reinforcement learning · Nature · 2022 · 676 citations
- Achievement of Target Gain Larger than Unity in an Inertial Fusion Experiment · Physical Review Letters · 2024 · 380 citations
- A simple facility for the teaching of plasma dynamics and plasma nuclear fusion · American Journal of Physics · 1988 · 234 citations
- The JOREK non-linear extended MHD code and applications to large-scale instabilities and their control in magnetically confined fusion plasmas · Nuclear Fusion · 2021 · 223 citations
- 3.0 - MOOSE: Enabling massively parallel multiphysics simulations · SoftwareX · 2024 · 155 citations
- Modeling radiation belt electron dynamics during GEM challenge intervals with the DREAM3D diffusion model · Journal of Geophysical Research Space Physics · 2013 · 143 citations
- Avoiding fusion plasma tearing instability with deep reinforcement learning · Nature · 2024 · 139 citations
- Kinetic analysis of the energy transport of bursty bulk flows in the plasma sheet · Journal of Geophysical Research Space Physics · 2012 · 114 citations
- LLM Fine-Tuning: Concepts, Opportunities, and Challenges · Big Data and Cognitive Computing · 2025 · 97 citations
- A high-density and high-confinement tokamak plasma regime for fusion energy · Nature · 2024 · 92 citations
Most recent work
- Numerical study of the ITER divertor plasma with the B2-EIRENE code package · Dokumentenrepositorium der RUB (Ruhr University Bochum) · 2026
- Design scoping and systems modelling of ST-E1 using the PyTok power plant simulation code · Nuclear Fusion · 2026
- Tokamak Energy’s pre-concept design for a fusion power plant: an overview of ST-E1 · Nuclear Fusion · 2026
- Equilibrium optimization of the Helios planar coil stellarator power plant · Fusion Engineering and Design · 2026
- Spherical tokamak physics research in preparation for the operation of NSTX-U · Nuclear Fusion · 2026
- Integrated physics and magnet design for the ST-E1 fusion power plant · Nuclear Fusion · 2026
- First global gyrokinetic profile predictions of ITER burning plasma · Nuclear Fusion · 2026
- Overview of ST40 results and future: expanding the physics basis of high-field spherical tokamaks · Nuclear Fusion · 2026
- On FIRE mode in KSTAR · Nuclear Fusion · 2026
- Performance and transport in the ARC tokamak · Journal of Plasma Physics · 2026
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