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News & Media

Latest ITER Newsline

  • Central solenoid assembly | First sequences underway

    What does it take to assemble the magnet at the heart of ITER? Heavy lifting, unerring accuracy, and a human touch. The central solenoid will be assembled from [...]

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  • Assembly | The eyes of ITER

    Supervisors ensure compliance and completion as machine and plant assembly forges ahead. In Greek mythology, Argus was considered an ideal guardian because his [...]

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  • Component repairs | Removing, displacing and disassembling

    A good repair job starts with a cleared workbench, the right tools on hand and a strong vise. This axiom, true for odd jobs in a home workshop, is also true for [...]

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  • Assembly | Set of handling tools for in-vessel installation finalized

    Inside of a test facility that reproduces the volume and geometry of the ITER vacuum vessel environment, a team from CNIM Systèmes Industriels has dem [...]

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  • 360° image of the week | The assembly theatre

    Ever since it was invented almost two centuries ago, photography has tried to capture what the human eye actually sees. Despite huge progress achieved, it has n [...]

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Of Interest

See archived entries

An unconventional approach to fusion

There's no easy road to fusion. Whether one travels the large route forged by six decades of research on hundreds of machines, or whether one tries to open a way through uncharted and exotic territory, difficulties abound and challenges loom large.

General Fusion's approach is quite exotic: no vacuum vessel in their planned fusion machine but a spherical tank filled with a liquid lead-lithium mixture spun into a vortex; no giant superconducting magnet system to confine the plasma but an array of pistons to compress it by way of a powerful shock wave... (Click to view larger version...)
General Fusion's approach is quite exotic: no vacuum vessel in their planned fusion machine but a spherical tank filled with a liquid lead-lithium mixture spun into a vortex; no giant superconducting magnet system to confine the plasma but an array of pistons to compress it by way of a powerful shock wave...
Over the past few years, several private sector startups have raised enough capital to launch their scientists and engineers into the race to harness fusion power. Tri Alpha Energy and Helion Energy in the US; Tokamak Energy and First Light Fusion in the UK; General Fusion in Canada and scores of others ... all claim they can deliver within the coming decade.

How they can succeed with a few tens or hundreds of million dollars in investment and a workforce that rarely exceeds a few dozen specialists is an open question—one that everyone present in the ITER amphitheatre on Monday 23 January had in mind.

The guest that day was physicist Michel Laberge, founder and chief scientist of General Fusion, the company that boasts it is ─ in the present tense ─ "transforming the world's energy supply with clean, safe and abundant fusion energy".

There is a world, of course, between the claim inscribed on the opening page of General Fusion's website and the present status of the company's research and experimentation. Facing a receptive and curious audience of fusion specialists, Laberge didn't seek to minimize the technical challenges his company is facing.

For anybody familiar with magnetic fusion and tokamaks, General Fusion's approach is quite exotic: no vacuum vessel in their planned fusion machine but a spherical tank filled with a liquid lead-lithium mixture spun into a vortex; no giant superconducting magnet system to confine the plasma but an array of pistons to compress it by way of a powerful shock wave...

Physicist Michel Laberge, founder and chief scientist of General Fusion, didn't seek to minimize the technical challenges his company is facing. (Click to view larger version...)
Physicist Michel Laberge, founder and chief scientist of General Fusion, didn't seek to minimize the technical challenges his company is facing.
The concept, called "magnetized target fusion" originated in the mid-1970s. It combines features of magnetic confinement fusion (like in ITER and other tokamaks) and inertial confinement fusion (like in the US National Ignition Facility or the French Laser Mégajoule).

"We aim to do fusion somewhere in the middle ground," said Laberge in his introduction. Supported by detailed graphs, high-speed videos and precise figures, his presentation and the ensuing exchanges were highly technical and at no moment was there any hint of condescendence or irony—from either side of the podium.

The encounter between the largest science project on the planet and a small, determined startup in western Canada, demonstrated that, at the end of the day, the fusion community—dreamers, explorers, experimenters—is really just one.


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