On a mission to accelerate fusion companies by bridging world-class science with deployable, industry-ready solutions.
Fusion Industry Partner
We cover fusion I&C end to end — Integrated Modeling for tokamak design, engineering, and operations; Fusion Diagnostics from feasibility study to the Modular Diagnostics Platform; and Plasma Control from individual controllers to a complete control system.
T-10 · JET · DIII-D · COMPASS · MAST · WEST · ST40 · T-15MD · JT-60SA · ITER
UC San Diego · Columbia University · UCLA · University of Tuscia · IST Lisbon · RFX Padua · and more
Pranos Fusion · DANTE Fusion · Cosylab · FEInn · Fusion Industry Association · European Fusion Association
What We Do
We work at the core of Instrumentation and Control (I&C) for the fusion industry — bringing together plasma simulations, diagnostics, and control into reliable, fully integrated solutions.
Integrated Modeling
We design and simulate tokamaks and other MCF devices for fusion builders — from feasibility study to design and engineering, powered by NSFsim, our validated simulator. Hundreds of simulations, 10+ feasibility studies, 5 tokamak startups supported.
Learn moreFusion Diagnostics
We design, build, and support plasma diagnostics for MCF devices and future power plants — standalone instruments or a full integrated platform, physics-enabled at every step. Magnetic, microwave, and neutron diagnostics, design software, and the Modular Diagnostics Platform.
Learn morePlasma Control
We build plasma controllers for next-generation devices — combining conventional robustness with AI/ML flexibility — plus discharge scenarios, a controller testing environment, and a plasma control system. Demonstrated live at DIII-D and other tokamaks.
Learn moreFusion Experts
Our team comprises plasma physicists, fusion engineers, software developers, and machine learning specialists. Based across the EU and UK, with headquarters in Luxembourg.
Meet our leadership team →
Tokamak assembly hall
At the tokamak
ITER model
Team workshop
Visiting ITER
Made in Luxembourg award
Why Next Step Fusion?
Deep expertise across the full fusion I&C stack — plasma science, engineering, diagnostics, software, control, and machine learning — all under one roof.
Fully fusion-focused
100% of our work is dedicated to fusion energy. No diluted priorities — just deep, sustained expertise in the field.
Proven plasma scientists
Our physicists come from leading public research organizations with hands-on experience at JET, DIII-D, MAST, ITER, JT-60SA, ST40, COMPASS, and more.
Experienced fusion engineers
Real device experience across tokamak operations, diagnostics development, design and engineering, and control system deployment.
Advanced integrated modeling
State-of-the-art simulation workflows for tokamak design and scenario development, built on deep expertise with tools like NSFsim, TGLF, TRAVIS, ASCOT5, and others.
Fusion diagnostics
End-to-end diagnostics solutions for next-generation fusion devices — from concept and design through commissioning and real-time data acquisition.
Plasma control
Advanced plasma control systems combining physics-based modeling, reinforcement learning, and real device experience at DIII-D and other tokamaks.
Partners & Collaborators
Get in Touch
Whether you're exploring a collaboration, planning a new device, or looking for a quote — we'd like to hear from you.
Contact information
Email
[email protected]
Address
33 Rue Du Puits Romain
L-8070 Bertrange
Luxembourg