{"id":3945,"date":"2026-04-21T11:19:12","date_gmt":"2026-04-21T11:19:12","guid":{"rendered":"https:\/\/menamagazine.com\/?p=3913"},"modified":"2026-04-21T11:19:12","modified_gmt":"2026-04-21T11:19:12","slug":"the-dumb-machine-promising-a-clean-energy-breakthrough","status":"publish","type":"post","link":"https:\/\/themena.com\/index.php\/2026\/04\/21\/the-dumb-machine-promising-a-clean-energy-breakthrough\/","title":{"rendered":"The &#8216;dumb machine&#8217; promising a clean energy breakthrough"},"content":{"rendered":"\n<p>Being accused of attempting the impossible is not unusual for the&nbsp;<a href=\"https:\/\/www.fusionindustryassociation.org\/wp-content\/uploads\/2025\/07\/2025-Global-Fusion-Industry-Report.pdf\" target=\"_blank\" rel=\"noopener\">scientists and engineers,&nbsp;external<\/a>&nbsp;working on nuclear fusion projects around the world.<\/p>\n\n\n\n<p>After all, they are attempting to capture, on Earth, the reaction that powers the Sun.<\/p>\n\n\n\n<p>Success could mean abundant, cheap and emission-free electricity. But the challenges are daunting and a working power station remains a long way off.<\/p>\n\n\n\n<p>Fusion is the process of fusing hydrogen nuclei together, which releases immense amounts of energy.<\/p>\n\n\n\n<p>On the Sun huge gravitational forces help keep the reaction going.<\/p>\n\n\n\n<p>To maintain fusion here on Earth, extremely high temperatures &#8211; many times those found on the Sun &#8211; are needed.<\/p>\n\n\n\n<p>So, a fuel (usually a combination of the hydrogen isotopes tritium and deuterium) is heated until it becomes a burning hot plasma, which then has to be controlled and manipulated to spark fusion.<\/p>\n\n\n\n<p>There are a number of ways to do this, and Germany&#8217;s Proxima Fusion is attempting one that is considered difficult, even by the extreme standards of the fusion industry.<\/p>\n\n\n\n<p>A common approach to fusion is to build a tokamak. It&#8217;s a doughnut-shaped device, which uses powerful magnets to contain the plasma.<\/p>\n\n\n\n<p>But Munich-based Proxima is working on a stellarator. It also uses magnets to manipulate the plasma but the reaction container has a more complicated shape, with twists and turn, making it much more difficult and expensive to build.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/themena.com\/wp-content\/uploads\/2026\/04\/de5e45f0-2c1d-11f1-b297-95b0a0a8331e.jpg\" alt=\"Wearing a red safety helmet and round glasses, Francesco Sciortino stands in front of fusion equipment.\" class=\"wp-image-3916\"\/><figcaption class=\"wp-element-caption\">A fusion reactor should be a &#8220;dumb machine&#8221;, says Francesco Sciortino<\/figcaption><\/figure>\n\n\n\n<p>So why go down this torturous path?<\/p>\n\n\n\n<p>Well, if the design works, the twists and turns of a stellarator make the burning hot plasma easier to control than in the rival tokamak design, says Sciortino.<\/p>\n\n\n\n<p>When comparing the two systems, he says a tokamak is a &#8220;beast&#8221; while the stellarator is a &#8220;little cat&#8221;.<\/p>\n\n\n\n<p>&#8220;A stellarator is a thing that is objectively very difficult to design, objectively very difficult to build. But if you do it, it is a dumb machine&#8230; just like a microwave oven,&#8221; says Sciortino.<\/p>\n\n\n\n<p>Proxima&#8217;s &#8220;dumb machine&#8221; will be a stellarator called Alpha. It will draw on decades of work done by Germany&#8217;s Max Planck Institute for Plasma Physics and its stellarator the W7-X.<\/p>\n\n\n\n<p>The aim of Alpha is to produce more energy than it uses to operate, and the lessons learned are helping to design an even more advanced device &#8211;&nbsp;<a href=\"https:\/\/www.youtube.com\/watch?v=V-ESoPOy-TI\" target=\"_blank\" rel=\"noopener\">a fusion power plant, called Stellaris,&nbsp;external<\/a>.<\/p>\n\n\n\n<p>But first, Alpha will need a lot of investment, which is being gathered at the moment.&nbsp;<a href=\"https:\/\/www.proximafusion.com\/press-news\/europes-turning-point-for-fusion-why-bavarias-eu400m-bet-on-proxima-matters\" target=\"_blank\" rel=\"noopener\">Proxima recently won \u20ac400m,&nbsp;external<\/a>&nbsp;(\u00a3340m; $460m) from the state of Bavaria and is bidding for more than a billion dollars of funding from the federal government &#8211; a decision is expected next year.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/themena.com\/wp-content\/uploads\/2026\/04\/fc927880-2c1c-11f1-a79a-77e93010d956-scaled-1.jpg\" alt=\"A worker inside the W7-X stellarator, which looks like a twisted and crinkled metal tube.\" class=\"wp-image-3917\"\/><figcaption class=\"wp-element-caption\">Inside the W7-X stellarator &#8211; the curves make for complicated engineering<\/figcaption><\/figure>\n\n\n\n<p>Proxima is racing other groups developing fusion technology &#8211;&nbsp;<a href=\"https:\/\/www.fusionindustryassociation.org\/wp-content\/uploads\/2025\/07\/2025-Global-Fusion-Industry-Report.pdf\" target=\"_blank\" rel=\"noopener\">53 according to the Fusion Industry Association (FIA),&nbsp;external<\/a>&nbsp;which represents the fusion industry and tracks developments.<\/p>\n\n\n\n<p>One project using the tokamak approach&nbsp;<a href=\"https:\/\/stepfusion.com\/about\/\" target=\"_blank\" rel=\"noopener\">is UK-based Step,&nbsp;external<\/a>&nbsp;(Spherical Tokamak for Energy Production).<\/p>\n\n\n\n<p>Backed by the UK government, the plan is to build a prototype powerplant on the site of a former coal-fired power station in West Burton, Yorkshire.<\/p>\n\n\n\n<p>&#8220;Tokamaks have the advantage of a deep experimental foundation built over decades. They have demonstrated plasma performance closer to what&#8217;s required for a fusion power plant, including operation with fusion fuel,&#8221; says Ryan Ramsey, the director of Organisational Performance at Step and formerly captain of the nuclear submarine HMS Turbulent.<\/p>\n\n\n\n<p>And in this kind of fusion, the expensive and powerful magnets should be relatively simple to build.<\/p>\n\n\n\n<p>&#8220;They [tokamaks] benefit from comparatively simpler magnetic geometry, with fewer and more regular coils. That has real implications for manufacturability, maintainability, and cost,&#8221; Ramsey says.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/themena.com\/wp-content\/uploads\/2026\/04\/11ed4ca0-2c31-11f1-934f-036468834728.jpg\" alt=\"A cut through of an apple-shaped tokamak. In the middle is red plasma, surrounded by D-shaped magnets.\" class=\"wp-image-3915\"\/><figcaption class=\"wp-element-caption\">This model of a tokamak shows the doughnut shape used to confine plasma<\/figcaption><\/figure>\n\n\n\n<p>Sciortino is well aware of the challenges ahead for Proxima. He &#8220;loses sleep&#8221; over whether Proxima will be able to build the magnets, with their intricate shapes, at a speed and cost that will make the stellarator an economic proposition.<\/p>\n\n\n\n<p>&#8220;The first magnet that we make will be very complicated and very expensive. But can we make it faster than people would expect, and can we drive down the cost?&#8221; Sciortini asks.<\/p>\n\n\n\n<p>In their favour is Germany&#8217;s expertise in manufacturing. For example, Sciortino cites the impressive number of workers who can operate CNC machines &#8211; a type of computer-controlled machine tool which can cut, carve, or shape materials including wood, metal, or plastic.<\/p>\n\n\n\n<p>Sciortino estimates that there are 550,000 CNC machinists in Germany, compared with 350,000 in the whole of the US.<\/p>\n\n\n\n<p>This matters for Proxima which uses a very expensive type of steel in its magnets, which needs machining to a high level of accuracy.<\/p>\n\n\n\n<p>While maintaining high levels of precision, keeping up the pace of development is crucial for Sciortino.<\/p>\n\n\n\n<p>The W7-X took more than a decade to get running &#8211; he wants to get Alpha operational in a third of that time.<\/p>\n\n\n\n<p>So a prototype magnetic coil is under construction and the plan is to test it next year.<\/p>\n\n\n\n<p>Its twisted geometry makes it one of the most complex magnets in the world, according to Proxima.<\/p>\n\n\n\n<p>Once the testing is complete, Proxima will build 40 more magnetic coils that will go into its Alpha machine.<\/p>\n\n\n\n<p>To do that, a magnet factory is in the early stages of construction.<\/p>\n\n\n\n<p>&#8220;In, 2028, 2029 we need to be able to make magnets at a crazy, crazy speed,&#8221; says Sciortino.<\/p>\n\n\n\n<p>The work is not just in Germany. Sciortino says that across Europe, there are key suppliers, which means Europe might well be at the forefront of a future fusion industry.<\/p>\n\n\n\n<p>&#8220;We [Europeans] missed the digital wave, didn&#8217;t we? But it turns out that we still have people being trained in manufacturing,&#8221; he says.<\/p>\n\n\n\n<p>At Step, Ramsey stresses that the fusion industry is well beyond a physics experiment now.<\/p>\n\n\n\n<p>&#8220;There&#8217;s real momentum across fusion right now, and that should be seen as a strength rather than something to divide. This isn&#8217;t a single-path race, it&#8217;s a set of approaches exploring different trade-offs. The real question now is not which concept is most interesting, but which can credibly deliver a power plant.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Being accused of attempting the impossible is not unusual for the&nbsp;scientists and engineers,&nbsp;external&nbsp;working on nuclear fusion projects around the world. After all, they are attempting&hellip;<\/p>\n","protected":false},"author":2,"featured_media":3965,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47,4,161,36],"tags":[741,742,743,744,745,37],"class_list":["post-3945","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-energy","category-international","category-science","category-technology","tag-dumb-machine","tag-fusion","tag-hydrogen-energy","tag-hydrogen-fusion","tag-science","tag-technology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The &#039;dumb machine&#039; promising a clean energy breakthrough - The MENA News<\/title>\n<meta name=\"description\" content=\"Fusion is the process of fusing hydrogen nuclei together, which releases immense amounts of energy. 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