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NEXT STEP FUSION
Simulation Software, Control Systems, and Digital Twins for tokamaks, future fusion reactors and power plants
About Us

We're a Luxembourg-based deep tech startup enabling fusion energy through precise tokamak simulations and reliable plasma control.


At Next Step Fusion, we believe that recent and upcoming scientific and technological advancements will soon give birth to the fusion power plant industry, providing humanity with safe and cheap energy.


As plasma confinement and control appear to be the most sophisticated and challenging problems, we pursue the opportunity to apply Machine Learning (ML) to plasma simulation and control for tokamaks and future fusion reactors, as well as other relevant tasks such as monitoring and analysis, disruption predictions, maintenance planning, personnel training, and more.

Our Work

Get in touch to discover how our technologies and products can benefit your work.


We collaborate with public institutions and provide reliable services to private companies.

Next Step Fusion Simulator
Our simulator, NSFsim, is foundational to everything we do. Our teams leverage it for myriad purposes, including simulation, experiment planning, analysis, and research. Beyond these applications, NSFsim plays a crucial role in training ML models for plasma control and behavior prediction. By simulating complex plasma behaviors and dynamics, it provides an essential environment for developing advanced control systems.

Very soon, NSFsim will be available as part of the fusion data analysis and simulation SaaS. Stay tuned!
BLOG POST
Fusion Twin Platform (SaaS)
Designing and executing fusion experiments is highly complex and inefficient, requiring skilled multidisciplinary teams, complex software, and competition for limited experimental time on a small number of accessible fusion devices.

Our Platform democratizes access to precise digital replicas of tokamaks, simplifies the design and execution of simulations, and assists in the analysis of experimental and simulation data. We aim to make it a hub for fusion experiments and collaboration among players in the fusion industry.

Let's accelerate the development of fusion energy together!
COMING SOON
Control Systems
Our journey began with the DIII-D tokamak. As a registered user of the DIII-D facility, we had all the necessary information, experimental data, and support to create and validate the DIII-D configuration for NSFsim. This allowed us to train the plasma shape and position control ML model, integrate it into the DIII-D Plasma Control System (PCS) as a real-time module, and even test it in real tokamak discharges. Details are coming soon!

Our long-term goal is to create a comprehensive PCS for current and future generations of fusion devices, and eventually an Integrated Control System for future fusion power plants.
NT Tokamak Design
Our project with Columbia University aims to design a Negative Triangularity (NT) tokamak. NT plasmas reduce turbulent transport, minimizing heat and particle losses, and improve confinement times while maintaining ELM-less L-mode operation, lowering thermal loads on reactor walls. The design includes a Low Field Side (LFS) divertor for easier maintenance access and reduced heat loads, ensuring efficient maintenance and stability.

This initiative aims to master designing tokamaks from scratch, establishing a supply chain, constructing the facility, and operating a mid-size device. It offers a valuable learning opportunity for our designers and engineers, helping them develop the skills and knowledge needed for advanced tokamak systems.
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Our Partners
We collaborate closely with fusion research institutions and private companies around the world.