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Our Work

Fusion Energy

The potential for zero-carbon,
abundant energy

Fusion is an advanced energy source with the potential to produce abundant, zero-emissions power around the world. Paving the way for fusion commercialization could allow us to integrate this carbon-free, firm source into the energy mix, and potentially revolutionize how we power the global economy.

Fusion energy

How does fusion energy work?

Fusion energy is a natural phenomenon, the very process that powers the Sun and helps make life on the Earth possible. In a fusion reaction, two light nuclei merge to form a single heavier nucleus when the right temperature, density, and time length conditions are met. The process releases energy because the total mass of the resulting single nucleus is less than the mass of the two original nuclei. The leftover mass becomes energy following the famous Einstein equation (E=mc2).

Fusion energy has the potential to provide:

  • Always available, firm power with non-high-level radioactive waste or greenhouse gas emissions.
  • High energy outputs with a very small land footprint, and no meltdown risk, reducing siting barriers.
  • Accessibility worldwide, as it does not rely on regional natural resources.
  • Potential for highly competitive power, producing more energy per gram of fuel than any other generating process.

But challenges remain:

  • Technology Advancement: We do not currently have the technology commercialized to tap into this promising energy source. To make fusion a reality, we must advance a diversity of fusion technologies and develop and test fusion plants in real conditions.
  • Regulatory Certainty: We need clear, specific, and proportionate regulations that provide a reference framework for developers.
  • Industry and Market Cultivation: We must establish a global fusion industry with a global market. The fusion industry is flourishing as new companies and start-ups are being created worldwide, and international collaborations and contracts are evolving quickly.

Our vision

CATF envisions a world where fusion energy has a viable pathway to commercial development, with the potential to transform our global energy matrix and dramatically reduce greenhouse gas emissions.

Our fusion experts engage industry leaders, governments, technology companies, national laboratories, and potential investors to advocate for the creation of a global market for the fusion industry with proper regulation. We play the critical role of catalyst and coordinator to find existing gaps in the industrialization and regulatory process and to set up and lead strategies to fill those gaps.

We aim to create a network that facilitates international collaboration, early commercial connections, engages in policy advocacy, and interfaces with public communications efforts to commercialize fusion energy systems.

Through our analysis, we aim to:

  • Support increases in technology readiness levels (TRLs) and advance commercial demonstrations 
  • Highlight the need for reference schemes, regulatory frameworks, and infrastructure 
  • Contribute to the development of appropriate fusion energy policy 
  • Contribute to the development of a global fusion energy industry 
  • Propose solutions to overcome supply chain issues 
  • Add new tools and skills into the field for workforce development 
  • Explore alternate approaches to fusion 

The path forward

CATF is paving the way toward the global demonstration and establishment of a fusion energy industry this decade.

We are undertaking and commissioning fusion energy market studies, technology readiness assessments, and regulatory analysis, emphasizing areas for international collaboration. As an objective and independent resource for stakeholders in the fusion sector, we are raising awareness of the potential for fusion energy – educating lawmakers, industry, and the NGO community on its potential while emphasizing the sector as a potential career path and business opportunity for supply chain providers.

Technology development

Advance the technology readiness levels (TRL) of existing technologies, create international reference databases, facilitate the introduction of new tools into fusion development and support new fusion concepts. 


Provide guidance elements and resources that mitigate uncertainties in the deployment of fusion as a commercial source of energy. 

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Access industrial environments

Develop reference tools to analyze, develop, and integrate fusion within the energy mix prospect, including in net-zero emission scenarios and beyond. 


Position fusion as a climate technology needed in the net-zero industry while advocating for adequate policies that enable the development of fusion as a safe and commercially viable source of energy. 

Meet the experts

Meet our staff working on fusion energy.

Fusion energy FAQs

What is fusion energy?

Nuclear fusion occurs when one or more lighter atomic nuclei combine to form a heavier nucleus, while releasing energy. This reaction happens in nature: it is the process that powers stars like the Sun, and because of fusion’s net energy generation, life on the Earth is possible.

What are fusion energy’s benefits?

Fusion energy provides distinct advantages as a net-zero, firm energy source:

  1. Zero Carbon Emissions: Unlike fossil fuels, fusion energy emits no greenhouse gases during the fusion process. By transitioning to fusion power, we can significantly reduce our carbon footprint, preserve natural resources, and foster a cleaner environment for future generations.
  2. Abundant Fuel Supply: Fusion fuel sources, such as deuterium and tritium, can be extracted from seawater and are virtually inexhaustible. With an ample supply of fuel, fusion energy offers long-term energy security and relief from concerns over resource scarcity.
  3. Safety and Waste Reduction: Fusion is self-limiting, making it inherently safe. Moreover, fusion machines are being tailored to not generate high level radioactive waste, making fusion a responsible and sustainable energy option.
  4. Minimal Land Requirements: Fusion offers higher energy output per land used with no significant space requirements for fuel or waste.
  5. Less Transmission Expansion: Fusion’s smaller footprint increases the suitability of locating plants near demand centers, thus reducing the expansion of long-distance transmission systems.

What are the different approaches to tapping into fusion energy?

There are many different approaches to harnessing the power of fusion energy – and CATF encourages advancement of all approaches that offer promise. Here are some of the most prominent approaches:

  1. Magnetic Confinement Fusion (MCF): The most prominent fusion research approach, MCF involves using powerful magnetic fields to confine and heat the plasma to the extreme temperatures required for fusion. Projects such as ITER and SPARC (a compact fusion machine being developed by MIT and Commonwealth Fusion Systems) aim to achieve sustained fusion reactions and pave the way for commercial-scale fusion power plants.
  2. Magnetized Target Fusion (MTF): Developed in the 1970’s by the U.S. Naval Reactors program, MTF relies on an imploding cylindrical metal liner that compresses a preheated and magnetized plasma configuration until thermonuclear conditions are achieved.
  3. Inertial Confinement Fusion (ICF): In ICF, high-energy lasers or particle beams compress and heat small fuel pellets to induce fusion. This approach, exemplified by the National Ignition Facility (NIF) in the United States, seeks to replicate the conditions found in the core of stars. While ICF faces technical challenges, progress is being made in achieving ignition and sustained fusion reactions.
  4. Field Reverse Configuration: Field reversed configurations, as well as related field-reversed mirrors, offer compact toroids with little or no toroidal magnetic field. This approach is characterized by high beta plasmas and their macroscopic stability.
  5. Other Fusion Categories: Magnetic or electric pinches, inertial electrostatic confinement, muon-catalyzed fusion and other forms of low-power fusion also exist, often at earlier stages of development when compared to more familiar categories.

What is the difference between nuclear fusion and nuclear fission?

Fusion and fission are different ways to convert energy into something useful, like heat or electricity. Both have the power to generate zero-carbon energy.

Energy is defined as the ability to do work. The categories of potential energy include kinetic, electrical, magnetic, nuclear, and gravitational. For each category, scientists have formulas to describe them. Fusion and fission both convert energy from atoms, but in opposite ways.

Fusion brings small nuclei so close that together that they fuse. Nuclei must be near enough that they can feel each other’s nuclear force. For fusion to occur, reacting nuclei must be very close to each other, within 10-10– 10-15 (a thousand trillionth) meter of one another. This is the same process that powers stars. The stars exploit their own gravity to create plasma conditions in their central regions where net fusion energy is generated. On Earth, fusion energy machines rely on other categories of energy to create similar conditions.

Fission breaks atoms apart, splitting up big nuclei into smaller ones. A neutron hits a larger atom, forcing it to split into two smaller atoms—also known as fission products. Additional neutrons are also released that can initiate a chain reaction. Energy is released when each atom splits.

Does nuclear fusion produce waste?

Fusion does produce waste. However, efforts are underway to minimize, circularize, or eliminate waste from the fusion energy cycle as much as possible. Most of the concepts being developed include materials affected by tritium. Tritium is a low beta energy emitter and low risk when outside the human body. As an isotope of hydrogen, it is highly mobile and can displace hydrogen in a range of organic compounds that can be inhaled or ingested (see Boyer, 2009). Tritium occurs naturally in the environment in very low concentrations and it was widely dispersed into the atmosphere during weapons testing in the 1950’s and 1960’s. Accordingly, tritium release limits to the environment are stringent. As it is short-lived, tritiated waste will be 99% decayed within 82 years.

Also, reduced activation materials will result in low-level radioactive waste after 100 years of operation shutdown. Fusiontailored Reduced Activation Ferritic Martensitic steels like EUROFER97 and F82H have been produced with this objective.

Is nuclear fusion safe?

Yes, fusion energy can be safely commercialized. Fusion is self-limiting, meaning the machine generating it turns off as soon as it is not in control – making it inherently safe. This characteristic results from the dependable physics of magnetically confined plasma. Additionally, fusion energy machines create their fuel as they operate, so unlike fossil and fission plants, no large stockpile of fuel exists on site. They are designed in a way that does not produce highly radioactive, long-lived nuclear waste.