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data-elementor-id="643" class="elementor elementor-643" data-elementor-post-type="page"> <div class="elementor-element elementor-element-c29ad22 e-flex e-con-boxed e-con e-parent" data-id="c29ad22" data-element_type="container"> <div class="e-con-inner"> <div class="elementor-element elementor-element-2196656 elementor-widget elementor-widget-breadcrumbs" data-id="2196656" data-element_type="widget" data-widget_type="breadcrumbs.default"> <div class="elementor-widget-container"> <p id="breadcrumbs"><span><span><a href="https://euro-fusion.org/">Home</a></span> » <span><a href="https://euro-fusion.org/devices/">EUROfusion Devices</a></span> » <span class="breadcrumb_last" aria-current="page"><a class="glossaryLink" aria-describedby="tt" data-cmtooltip="<div class=glossaryItemBody>Wendelstein 7-X is an advanced stellarator, housed at the IPP Greifswald campus, and it began operations in December 2015. (read more)</div>" href="https://euro-fusion.org/glossary/wendelstein-7-x/" data-gt-translate-attributes='[{"attribute":"data-cmtooltip", "format":"html"}]' tabindex="0" role="link">Wendelstein 7-X</a></span></span></p> </div> </div> </div> </div> <div data-dce-background-image-url="https://euro-fusion.org/wp-content/uploads/2022/11/7b-scaled.jpg" class="elementor-element elementor-element-1b434f6 e-con-full e-flex e-con e-parent" data-id="1b434f6" data-element_type="container" data-settings='{"background_background":"classic"}'> <div class="elementor-element elementor-element-7dff71a elementor-widget elementor-widget-heading" data-id="7dff71a" data-element_type="widget" data-widget_type="heading.default"> <div class="elementor-widget-container"> <h3 class="elementor-heading-title elementor-size-default">Stellarator: An alternative to the Tokamak</h3> </div> </div> <div class="elementor-element elementor-element-f98d62e elementor-widget elementor-widget-heading" data-id="f98d62e" data-element_type="widget" data-widget_type="heading.default"> <div class="elementor-widget-container"> <h6 class="elementor-heading-title elementor-size-small">Credit: EUROfusion consortium; Photographer: Christopher Roux (CEA-IRFM);</h6> </div> </div> </div> <div class="elementor-element elementor-element-8b5f6a2 e-flex e-con-boxed e-con e-parent" data-id="8b5f6a2" data-element_type="container"> <div class="e-con-inner"> <div class="elementor-element elementor-element-c0f9bfc e-flex e-con-boxed e-con e-child" data-id="c0f9bfc" data-element_type="container"> <div class="e-con-inner"> <div class="elementor-element elementor-element-bf0e972 elementor-widget elementor-widget-heading" data-id="bf0e972" data-element_type="widget" data-widget_type="heading.default"> <div class="elementor-widget-container"> <h1 class="elementor-heading-title elementor-size-default">Wendelstein 7-X - the world's largest stellarator</h1> </div> </div> </div> </div> </div> </div> <div class="elementor-element elementor-element-0b70e9f e-flex e-con-boxed e-con e-parent" data-id="0b70e9f" data-element_type="container"> <div class="e-con-inner"> <div class="elementor-element elementor-element-8aab262 e-con-full e-flex e-con e-child" data-id="8aab262" data-element_type="container"> <div class="elementor-element elementor-element-7af0f56 elementor-widget elementor-widget-text-editor" data-id="7af0f56" data-element_type="widget" data-widget_type="text-editor.default"> <div class="elementor-widget-container"> <p>The advanced <a class="glossaryLink" aria-describedby="tt" data-cmtooltip="<div class=glossaryItemBody>A toroidal magnetic confinement device whose poloidal field is generated by external helical coils. (read more)</div>" href="https://euro-fusion.org/glossary/stellarator/" data-gt-translate-attributes='[{"attribute":"data-cmtooltip", "format":"html"}]' tabindex="0" role="link">stellarator</a> Wendelstein 7-X, housed at the IPP Greifswald campus began operations in December 2015. Wendelstein 7-X is an engineering and modelling feat, not only because it is the world’s largest stellarator with a diameter of around 16 metres but also because it is expected to be able to confine the 100-million-degree Celsius <a class="glossaryLink" aria-describedby="tt" data-cmtooltip="<div class=glossaryItemBody>Plasma is called the forth state of matter, it is neither solid, liquid, nor gas. (read more)</div>" href="https://euro-fusion.org/glossary/plasma/" data-gt-translate-attributes='[{"attribute":"data-cmtooltip", "format":"html"}]' tabindex='0' role='link'>plasma</a> discharges for up to 30 minutes. Among other things, EUROfusion researchers are investigating the device to determine the suitability of a stellarator concept for a power plant. Visit the <a href="https://www.ipp.mpg.de/w7x" target="_blank" rel="noopener">IPP webpage on Wendelstein 7-X</a> to learn more.</p><h3>Quick facts:</h3><ul><li>Major plasma radius: 5,5 metres</li><li>Minor plasma radius: 0,53 metre</li><li>Magnetic field: 3 tesla</li><li>Pulse length: max. 30 minutes</li><li>Plasma heating: 14 megawatts</li><li>Plasma volume: 30 cubic metres</li><li>Plasma mixture: <a class="glossaryLink" aria-describedby="tt" data-cmtooltip="<div class=glossaryItemBody>Hydrogen is the lightest element with atomic number 1. (read more)</div>" href="https://euro-fusion.org/glossary/hydrogen/" data-gt-translate-attributes='[{"attribute":"data-cmtooltip", "format":"html"}]' tabindex='0' role='link'>hydrogen</a>, deuterium</li><li>Plasma <a class="glossaryLink" aria-describedby="tt" data-cmtooltip="<div class=glossaryItemBody>A measure of thermal energy in units of degrees or electron volts. (read more)</div>" href="https://euro-fusion.org/glossary/temperature/" data-gt-translate-attributes='[{"attribute":"data-cmtooltip", "format":"html"}]' tabindex="0" role="link">temperature</a>: 60 – 130 million degrees Celsius</li></ul> </div> </div> </div> <div class="elementor-element elementor-element-d0a2db4 e-con-full e-flex e-con e-child" data-id="d0a2db4" data-element_type="container"> <div class="elementor-element elementor-element-aabeab1 elementor-widget elementor-widget-image" data-id="aabeab1" data-element_type="widget" data-widget_type="image.default"> <div class="elementor-widget-container"> <figure class="wp-caption"> <a href="https://www.youtube.com/watch?v=R_kPM1J-F0Q" target="_blank"> <img fetchpriority="high" decoding="async" width="433" height="273" src="https://euro-fusion.org/wp-content/uploads/2022/11/Wendelstein_7X_first_plasma.jpg" class="attachment-large size-large wp-image-4479" alt="" srcset="https://euro-fusion.org/wp-content/uploads/2022/11/Wendelstein_7X_first_plasma.jpg 433w, https://euro-fusion.org/wp-content/uploads/2022/11/Wendelstein_7X_first_plasma-300x189.jpg 300w" sizes="(max-width: 433px) 100vw, 433px"/> </a> <figcaption class="widget-image-caption wp-caption-text">A short documentary captures the atmosphere during the operational start of the Wendelstein 7-X fusion device. Click to watch on YouTube; Credit: IPP;</figcaption> </figure> </div> </div> </div> </div> </div> </div> <footer data-elementor-type="footer" data-elementor-id="13528" class="elementor elementor-13528 elementor-location-footer" data-elementor-post-type="elementor_library"> <div class="elementor-element elementor-element-8327d5a e-flex e-con-boxed e-con e-parent" data-id="8327d5a" data-element_type="container"> <div class="e-con-inner"> <div class="elementor-element elementor-element-221c83b e-con-full e-flex e-con e-child" data-id="221c83b" data-element_type="container"> <div class="elementor-element elementor-element-88a5ef6 elementor-widget elementor-widget-text-editor" data-id="88a5ef6" data-element_type="widget" data-widget_type="text-editor.default"> <div class="elementor-widget-container"> <p><img class="alignleft size-full wp-image-325" src="https://euro-fusion.org/wp-content/uploads/2022/06/flag_europe.png" alt="" width="102" height="69" />This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 — EUROfusion). 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