Germany Fusion Strategy (Fusion 2040)

Overview

The Germany fusion strategy, formally outlined in the Federal Ministry of Education and Research (BMBF) position paper of September 2023, represents a significant policy shift towards the accelerated development of fusion energy. The strategy, often colloquially associated with a "Fusion 2040" timeline, establishes a national roadmap with the explicit goal of enabling the construction and operation of a fusion power plant in Germany by the 2040s. This marks a transition from a decades-long focus on fundamental plasma physics research to a mission-oriented, technology-driven program.

The strategy is built upon a dual-pillar approach. It reaffirms strong, continued support for Germany's world-leading public research institutions, primarily the Max Planck Institute for Plasma Physics (IPP) and the Karlsruhe Institute of Technology (KIT), which are central to the European fusion program and the ITER project. Concurrently, it introduces new mechanisms designed to cultivate a vibrant private fusion ecosystem. This includes dedicated funding programs to support startups and foster public-private partnerships, recognizing that commercial entities are becoming critical drivers of innovation in the field. The strategy aims to secure Germany's technological sovereignty and industrial competitiveness in a future global fusion energy market.

Core Pillars and Funding Mechanisms

The German fusion strategy is structured around three core technological pillars and a new funding framework to support them. The BMBF has committed over €1 billion to public fusion research for the period 2024-2028, separate from the new initiatives aimed at the private sector.

Pillar 1: Magnetic Confinement Fusion (MCF) This remains the central pillar, leveraging Germany's extensive expertise. It encompasses two primary device types:

Tokamaks: Support for the ASDEX Upgrade tokamak at IPP Garching continues, serving as a key testbed for ITER operational scenarios, plasma-wall interaction studies, and the development of advanced divertor concepts. Germany's contributions to ITER via EUROfusion are a cornerstone of this effort.
Stellarators: Germany is the global leader in stellarator research, centered on the Wendelstein 7-X (W7-X) device at IPP Greifswald. The strategy emphasizes capitalizing on the stellarator's potential for steady-state operation, a key advantage for a future power plant. Funding is directed towards upgrading W7-X to demonstrate high-performance, long-pulse plasma operation.

Pillar 2: Inertial Fusion Energy (IFE) Recognizing recent progress, particularly in the United States, the strategy elevates IFE as a viable alternative path. It calls for strengthening research into laser-based fusion, focusing on high-repetition-rate target delivery, efficient laser drivers, and the development of robust chamber and target technologies. This pillar aims to build a competitive German research community in IFE.

Pillar 3: Technology and Materials Research This cross-cutting pillar addresses the critical engineering challenges for a fusion power plant. Key areas include:

Tritium Breeding: Research at KIT on the tritium breeding ratio and the development of breeding blanket modules for ITER is central. The strategy supports the development of facilities to test tritium cycle components.
Materials Science: Developing materials that can withstand the extreme heat and neutron flux of a fusion environment. This includes work on reduced-activation steels and tungsten alloys.
Heating and Current Drive Systems: Advancing the technologies for plasma heating, such as gyrotrons and neutral beam injection.
Superconducting Magnets: Leveraging German industrial and research expertise in high-temperature superconductors (HTS) for more compact and efficient magnet systems.

Funding Mechanisms for Commercialization The most novel aspect of the strategy is the introduction of the "Fusion 2040 – Research towards the Fusion Power Plant" program. Announced in 2024, this program is designed to bridge the gap between public research and private industry. It will fund collaborative projects that bring together universities, research institutes, and private companies to solve specific technological hurdles on the path to a power plant. The program is technology-agnostic, supporting the most promising concepts regardless of their origin, and aims to create a robust supply chain for fusion components within Germany.

Historical Development

Germany has been a leading nation in fusion research since the 1960s. The foundation of this leadership was the establishment of the Max Planck Institute for Plasma Physics (IPP) in Garching in 1960. Early work focused on fundamental plasma physics and exploring various magnetic confinement concepts.

1960s-1980s: IPP developed a series of tokamaks under the ASDEX (Axially Symmetric Divertor Experiment) program. ASDEX, which operated from 1980 to 1990, was instrumental in discovering the H-mode (High-confinement mode) of plasma operation in 1982. This discovery was a major breakthrough for the tokamak concept and is the baseline operational scenario for ITER.
1990s: Following the success of ASDEX, IPP constructed and began operating ASDEX Upgrade in 1991. This device was designed with a divertor configuration and plasma shape similar to that planned for ITER, making it a crucial tool for preparing for the next generation of fusion machines.
1980s-2010s: In parallel, Germany pursued the stellarator line, an alternative to the tokamak. The Wendelstein 7-AS (Advanced Stellarator) operated at IPP Garching from 1988 to 2002, successfully demonstrating the viability of the modular coil concept. This paved the way for its much larger successor, Wendelstein 7-X, which was constructed in Greifswald and began operation in 2015. W7-X is the world's most advanced stellarator, designed to prove the reactor-relevance of the concept.
2020s: The global landscape began to shift with the rise of private fusion companies and milestones achieved at facilities like the National Ignition Facility (NIF) in the US. Recognizing this new dynamism, the German government, under Research Minister Bettina Stark-Watzinger, initiated a review of its national strategy. This culminated in the September 2023 position paper, which formally launched the new, accelerated, and commercially-oriented fusion program.

Current Status (as of 2026)

As of 2026, the German fusion strategy is in its early implementation phase. The BMBF has launched the first calls for proposals under the "Fusion 2040" program, with significant interest from both established research consortia and emerging startups. The program's initial focus is on component development, materials science, and simulation capabilities that can benefit multiple fusion concepts.

Public research programs remain robust. At IPP Garching, ASDEX Upgrade continues to conduct experiments in direct support of the ITER research plan, particularly in the areas of tungsten divertor physics and mitigating plasma disruptions. At IPP Greifswald, Wendelstein 7-X is undergoing planned upgrades to its cooling systems and plasma-facing components. These enhancements are designed to enable it to achieve its primary mission objective: demonstrating 30 minutes of continuous, high-performance plasma operation, a critical milestone for the stellarator concept.

Karlsruhe Institute of Technology (KIT) is advancing its work on the tritium fuel cycle, constructing new test facilities for breeding blanket components and tritium processing systems. There is also a growing academic network focused on IFE, with universities beginning to establish research groups dedicated to laser-plasma physics and target engineering, supported by initial seed funding from the new strategy.

Notable Implementations

While the strategy is still new, several key entities are central to its implementation:

Max Planck Institute for Plasma Physics (IPP): As the operator of ASDEX Upgrade and Wendelstein 7-X, IPP remains the cornerstone of Germany's public fusion research. It is a primary recipient of core funding and a key partner in the new public-private initiatives.
Karlsruhe Institute of Technology (KIT): KIT is the national center for fusion technology, focusing on the engineering challenges of a power plant, including materials, magnets, and the critical tritium fuel cycle.
EUROfusion: Germany is a major contributor to and beneficiary of the EUROfusion consortium, which coordinates fusion research across Europe. German institutions play leading roles in EUROfusion's work packages, ensuring alignment with the broader European roadmap and maximizing the return on investment in ITER.
Private Companies: A small but growing number of German fusion startups are emerging. Companies like Gauss Fusion and Proxima Fusion are actively participating in the new funding programs. Gauss Fusion, an industrial consortium, focuses on a stellarator-based power plant, aiming to leverage Germany's unique expertise in this area. Proxima Fusion, a spin-off from IPP, is also developing a stellarator concept based on the W7-X design. The strategy is designed to support these and other new ventures.

Open Challenges

Despite the ambitious strategy and strong research foundation, Germany faces several significant challenges:

Regulatory Framework: A clear and efficient regulatory pathway for licensing and constructing a fusion power plant does not yet exist in Germany or the EU. The strategy calls for its development, but this will require complex coordination between scientific advisors, federal ministries, and international bodies like the IAEA. Establishing a framework that is robust yet streamlined is critical to meeting the 2040s timeline.
Industrial Scale-Up: Germany has a world-class manufacturing and engineering sector, but the supply chain for specialized fusion components (e.g., superconducting magnets, vacuum vessels, breeding blankets) is nascent. Scaling up industrial capacity to build a power plant will require substantial investment and long-term commitment.
Human Capital: While Germany has excellent physicists, there is a need to train a new generation of fusion engineers, technicians, and regulators. The strategy acknowledges this, but implementing effective education and training programs at scale is a long-term challenge.
Public-Private Integration: Effectively integrating the fast-paced, milestone-driven culture of private startups with the long-term, science-driven approach of public institutions is a key management challenge. Ensuring that intellectual property and collaboration models are beneficial for both sides will be crucial for the success of the new funding programs.
Funding Sustainability: The initial funding commitments are substantial, but building a fusion power plant will require tens of billions of euros. Securing a stable, long-term political and financial commitment across multiple election cycles will be essential.

Outlook

The credible 5-15 year trajectory for the German fusion strategy involves several key phases. In the near term (2026-2031), the focus will be on executing the first phase of the "Fusion 2040" program, funding a portfolio of technology projects and fostering the growth of the private fusion sector. During this period, W7-X is expected to complete its high-performance, long-pulse campaigns, providing critical data on the viability of the stellarator concept for a power plant. Success in these campaigns would significantly boost confidence in stellarator-based commercial ventures.

In the medium term (2031-2036), the strategy anticipates that results from ITER's first plasma and Deuterium-Tritium campaigns, combined with progress from national programs, will allow for a down-selection of the most promising power plant concepts. Germany aims to have one or more well-funded companies or consortia with a mature power plant design ready by this stage. A critical milestone will be the development and approval of a national regulatory framework for fusion energy.

Looking towards the late 2030s, the strategy's ultimate goal is to have a site selected and a decision made to construct a first-of-a-kind fusion power plant in Germany. The success of this final step will depend on achieving the necessary scientific and technological milestones, securing massive public and private investment, and maintaining broad political and public support. The strategy positions Germany to be a technology provider and a potential host for one of the world's first commercial fusion power plants.

References

Positionspapier des BMBF zur Fusionsforschung — Bundesministerium für Bildung und Forschung (BMBF) (2023)
Stark-Watzinger: We are kicking off the new 'Fusion 2040' research programme — Bundesministerium für Bildung und Forschung (BMBF) (2024)
Germany wants to build a nuclear fusion power plant by 2040 — Clean Energy Wire (2024)
IPP Annual Report 2022/2023 — Max Planck Institute for Plasma Physics (IPP) (2024)
Germany's new fusion energy strategy — EUROfusion (2023)
The German research landscape for inertial fusion — Matter and Radiation at Extremes (2022)
Gauss Fusion: A new European private fusion company with a stellarator focus — Nuclear Fusion (2024)
ASDEX Upgrade—a tokamak for ITER and DEMO — Fusion Science and Technology (2020)

Germany fusion strategy (Fusion 2040)