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A spherical tokamak is a type of fusion power device based on the tokamak principle. It is notable for its very narrow profile, or aspect ratio. A traditional tokamak has a toroidal confinement area that gives it an overall shape similar to a donut, complete with a large hole in the middle. The spherical tokamak reduces the size of the hole as much as possible, resulting in a plasma shape that is almost spherical, often compared with a cored apple. The spherical tokamak is sometimes referred to as a spherical torus and often shortened to ST. The spherical tokamak is an offshoot of the conventional tokamak design. Proponents claim that it has a number of substantial practical advantages over these devices. For this reason the ST has generated considerable interest since the late 1980s. However, development remains effectively one generation behind traditional tokamak efforts like JET. Major experiments in the ST field include the pioneering START and MAST at Culham in the UK, the US's NSTX-U and Russian Globus-M. Research has investigated whether spherical tokamaks are a route to lower cost reactors. Further research is needed to better understand how such devices scale. Even in the event that STs do not lead to lower cost approaches to power generation, they are still lower cost in general; this makes them attractive devices for studying plasma physics, or as high-energy neutron sources. (en) Un tokamak sphérique est un dispositif de confinement magnétique de plasma de type tokamak permettant d'obtenir des réactions de fusions de nucléons (fusion nucléaire). Un tokamak sphérique a un solénoïde central beaucoup plus fin qu'un tokamak classique. Une telle installation serait susceptible d'être utilisée pour produire de l'électricité. (fr) 球状トカマク(Spherical Tokamak)は超高温のプラズマを閉じこめる磁気閉じ込め方式であるトカマク型の一形式。 (ja) |
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http://fusion.k.u-tokyo.ac.jp/index-e.html http://pegasus.ep.wisc.edu/index.htm http://www.plasma.inpe.br/LAP_Portal/LAP_Site/Text/ETE_Spherical_Tokamak.htm http://www.sunist.org/index.htm http://www.tokamakenergy.co.uk/the-st25-and-st25hts-tokamaks/ http://www.triam.kyushu-u.ac.jp/ICPP/program/download/12-PL01.pdf https://www.triam.kyushu-u.ac.jp/ http://www-pub.iaea.org/MTCD/publications/PDF/csp_001c/pdf/ov2_5.pdf http://www.frascati.enea.it/ProtoSphera/ http://www.ccfe.ac.uk/MAST.aspx http://www.ccfe.ac.uk/st.aspx http://nstx.pppl.gov/ http://www.sunist.org/shared%20documents/References/Papers/Storage/High-Beta%20performance%20of%20the%20START%20spherical%20tokamak.pdf http://globus.rinno.ru https://web.archive.org/web/20110717072556/http:/www.toodlepip.com/tokamak/spherical-tokamaks.htm https://web.archive.org/web/20110722072454/http:/www.triam.kyushu-u.ac.jp/ICPP/program/download/12-PL01.pdf https://web.archive.org/web/20120307044223/http:/www.sunist.org/shared%20documents/References/Papers/Storage/High-Beta%20performance%20of%20the%20START%20spherical%20tokamak.pdf http://home.clara.net/balshaw/tokamak/table-of-spherical-tokamaks.pdf |
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Un tokamak sphérique est un dispositif de confinement magnétique de plasma de type tokamak permettant d'obtenir des réactions de fusions de nucléons (fusion nucléaire). Un tokamak sphérique a un solénoïde central beaucoup plus fin qu'un tokamak classique. Une telle installation serait susceptible d'être utilisée pour produire de l'électricité. (fr) 球状トカマク(Spherical Tokamak)は超高温のプラズマを閉じこめる磁気閉じ込め方式であるトカマク型の一形式。 (ja) A spherical tokamak is a type of fusion power device based on the tokamak principle. It is notable for its very narrow profile, or aspect ratio. A traditional tokamak has a toroidal confinement area that gives it an overall shape similar to a donut, complete with a large hole in the middle. The spherical tokamak reduces the size of the hole as much as possible, resulting in a plasma shape that is almost spherical, often compared with a cored apple. The spherical tokamak is sometimes referred to as a spherical torus and often shortened to ST. (en) |
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Tokamak sphérique (fr) 球状トカマク (ja) Spherical tokamak (en) |
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