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United Kingdom lights up its unusual fusion reactor | |
admin | |
2020-10-30 | |
发布年 | 2020 |
语种 | 英语 |
国家 | 美国 |
领域 | 资源环境 |
正文(英文) | The United Kingdom’s revamped fusion reactor, known as the Mega Amp Spherical Tokamak (MAST) Upgrade, powered up for the first time yesterday after a 7-year build. The £55 million device will be a testbed for technologies critical to all future fusion reactors, and may provide a stepping stone to a new design of energy-producing facility. Tokamaks are the frontrunners in the decadeslong effort to generate energy by fusing light elements together. These doughnut-shaped vessels contain a superhot ionized gas—or plasma—of hydrogen isotopes that is constrained with powerful magnets and heated by microwaves and particle beams. (ITER, a gigantic tokamak under construction in France, is a major focus of global efforts to realize fusion power.) MAST is a variation on the standard tokamak; it is shaped more like a cored apple than a doughnut. Researchers believe that shape can confer greater stability in the roiling plasma than a doughnut-shaped tokamak, but it is less well understood than the traditional design. MAST first tested the concept on a large scale starting in 1999 and has now been upgraded with extra heating power, new technology for extracting heat from the plasma, and other improvements. A parallel effort at the Princeton Plasma Physics Laboratory, called the National Spherical Torus Experiment (NSTX), was similarly upgraded. Soon after restarting in 2016, however, NSTX suffered a magnet failure and is now being rebuilt. U.K. researchers hope MAST Upgrade will demonstrate enough improvement in performance that they can move ahead with a plan for building a spherical tokamak demonstration power plant. They started to work on a design for the Spherical Tokamak for Energy Production last year with £220 million in government funding and hope to be powering up this next-generation machine in 2040. |
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来源平台 | Science |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/301186 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | admin. United Kingdom lights up its unusual fusion reactor. 2020. |
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