Spheromak (original) (raw)
Un sphéromak est un arrangement de plasma prenant la forme d'un vortex toroïdal (un tube courbé refermé sur lui-même). Le terme sphéromak n'est pas un synonyme de tokamak sphérique. Le sphéromak contient de grands courants électriques internes avec les champs magnétiques associés. Ils sont disposés de manière que les forces magnétohydrodynamiques à l'intérieur du sphéromak soient presque équilibrées, ce qui permet d'obtenir des temps de confinement de longue durée (microsecondes) sans champs externes. Les sphéromaks appartiennent à un type de configuration de plasma appelé tores compacts ou compact toroid.
| Property | Value |
|---|---|
| dbo:abstract | Un sphéromak est un arrangement de plasma prenant la forme d'un vortex toroïdal (un tube courbé refermé sur lui-même). Le terme sphéromak n'est pas un synonyme de tokamak sphérique. Le sphéromak contient de grands courants électriques internes avec les champs magnétiques associés. Ils sont disposés de manière que les forces magnétohydrodynamiques à l'intérieur du sphéromak soient presque équilibrées, ce qui permet d'obtenir des temps de confinement de longue durée (microsecondes) sans champs externes. Les sphéromaks appartiennent à un type de configuration de plasma appelé tores compacts ou compact toroid. (fr) A spheromak is an arrangement of plasma formed into a toroidal shape similar to a smoke ring. The spheromak contains large internal electric currents and their associated magnetic fields arranged so the magnetohydrodynamic forces within the spheromak are nearly balanced, resulting in long-lived (microsecond) confinement times without external fields. Spheromaks belong to a type of plasma configuration referred to as the compact toroids. A spheromak can be made and sustained using magnetic flux injection, leading to a dynomak. The physics of the spheromak and of collisions between spheromaks is similar to a variety of astrophysical events, like coronal loops and filaments, relativistic jets and plasmoids. They are particularly useful for studying magnetic reconnection events, when two or more spheromaks collide. Spheromaks are easy to generate using a "gun" that ejects spheromaks off the end of an electrode into a holding area, called the flux conserver. This has made them useful in the laboratory setting, and spheromak guns are relatively common in astrophysics labs. These devices are often, confusingly, referred to simply as "spheromaks" as well; the term has two meanings. Spheromaks have been proposed as a magnetic fusion energy concept due to their long confinement times, which was on the same order as the best tokamaks when they were first studied. Although they had some successes during the 1970s and '80s, these small and lower-energy devices had limited performance and most spheromak research ended when fusion funding was dramatically curtailed in the late 1980s. However, in the late 1990s research demonstrated that hotter spheromaks have better confinement times, and this led to a second wave of spheromak machines. Spheromaks have also been used to inject plasma into a bigger magnetic confinement experiment like a tokamak. (en) Lo spheromak è una configurazione del campo magnetico in cui la componente toroidale e quella poloidale hanno la stessa intensità. Lo spheromak è impiegato nell'ambito della ricerca sui reattori nucleari a fusione a confinamento magnetico, in questa modalità è possibile mantenere il plasma di fusione in equilibrio magnetoidrodinamico. La stabilizzazione del campo magnetico è largamente autogenerata attraverso le correnti del plasma arrivando a un plasma stabile e tipicamente toroidale. Il termine spheromak è anche usato per riferirsi alla configurazione stessa del plasma. Un dispositivo spheromak è, come per la configurazione a campo invertito, considerato un tipo di toroide compatta. A differenza dei tokamak e degli stellarator, i dispositivi di questo tipo hanno un design più semplice e richiedono un solo set di bobine magnetiche. (it) スフェロマック型 (Spheromak) は磁場閉じ込め方式核融合の一形式。 (ja) |
| dbo:thumbnail | wiki-commons:Special:FilePath/Spheromak_Formation_In_Dynomak_-_Model.png?width=300 |
| dbo:wikiPageExternalLink | http://crppwww.epfl.ch/~duval/P5_047.pdf%23search='spheromak' http://plasma.physics.swarthmore.edu/SSX/index.html http://ve4xm.caltech.edu/Bellan_plasma_page/spheroma.htm http://www-ferp.ucsd.edu/PUBLIC/AC-PANEL/REC-DOCS/W-PAPERS/spher.html http://www.woodruffscientific.com/SpheromakMaster.html http://plasma.physics.swarthmore.edu/SSX/faq.html http://www.osti.gov/bridge/purl.cover.jsp%3Fpurl=/304511-FwbU8y/webviewable/ https://books.google.com/books%3Fid=Zj4vx9O0T0YC https://web.archive.org/web/20110718062941/http:/www.mfescience.org/sspx/pdfs/spheromakfusion.pdf https://web.archive.org/web/20110718062956/http:/www.mfescience.org/sspx/pdfs/whatis-v2.pdf https://web.archive.org/web/20110720053118/http:/plasma.swarthmore.edu/SSX/index.html http://www.llnl.gov/str/Hill.html http://www.llnl.gov/str/September05/Hill.html |
| dbo:wikiPageID | 1997197 (xsd:integer) |
| dbo:wikiPageLength | 26035 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1108271820 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Caltech dbr:Capacitor dbr:Princeton_Plasma_Physics_Laboratory dbr:Princeton_University dbr:Electric_current dbr:Electrode dbr:Magnetic_mirror dbr:Black-body_radiation dbr:Alfvén_wave dbr:Joint_European_Torus dbr:University_of_Miami dbr:University_of_Tokyo dbr:Dynamo dbr:Dynomak dbr:Railgun dbr:Sustained_Spheromak_Physics_Experiment dbr:Coronal_loop dbr:File:A_comparison_of_an_FRC_and_A_Spheromak.png dbr:Plasmoid dbr:Lodewijk_Woltjer dbr:Lorentz_force dbr:Los_Alamos_National_Laboratory dbr:Magnetic_field dbr:Stellarator dbr:Compact_toroid dbr:ZETA_(fusion_reactor) dbr:Magnetic_reconnection dbr:Microsecond dbr:Tokamak dbr:Toroidal_and_poloidal dbr:Taylor_state dbr:Toroid dbr:Nihon_University dbr:Nobel_Prize_in_Physics dbr:Flux dbr:Lenz's_law dbr:Magnetic_flux dbr:Solar_prominence dbr:Hannes_Alfvén dbr:Harold_Furth dbr:Astrophysics dbr:Magnetohydrodynamic dbc:Plasma_physics dbr:John_Bryan_Taylor dbr:Lawrence_Livermore_National_Laboratory dbr:Lawson_criterion dbr:Swarthmore_College dbc:Magnetic_confinement_fusion dbr:Plasma_(physics) dbr:Field-reversed_configuration dbr:Ideal_gas_law dbr:Mercury_(element) dbr:X-ray dbr:Magnetic_helicity dbr:Lundquist_number dbr:MARAUDER dbr:Magnetic_fusion_energy dbr:Magnus_effect dbr:Shiva_Star dbr:Smoke_ring dbr:Warhead dbr:INRS-EMT dbr:Z-pinch dbr:Trisops dbr:Spherical_tokamak dbr:Toroidal_moment dbr:List_of_plasma_(physics)_articles dbr:Theta_pinch dbr:Bar_magnet dbr:Relativistic_jet dbr:Confinement_time dbr:File:Spheromak_Formation_In_Dynomak_-_Model.png dbr:Plasma_vortex |
| dbp:wikiPageUsesTemplate | dbt:Fusion_methods dbt:Citation_needed dbt:Cite_book dbt:Cite_web dbt:Clarify dbt:Distinguish dbt:Dubious dbt:Reflist dbt:Sfn dbt:Use_dmy_dates dbt:Nuclear_technology |
| dcterms:subject | dbc:Plasma_physics dbc:Magnetic_confinement_fusion |
| gold:hypernym | dbr:Arrangement |
| rdf:type | owl:Thing dbo:MusicalWork |
| rdfs:comment | Un sphéromak est un arrangement de plasma prenant la forme d'un vortex toroïdal (un tube courbé refermé sur lui-même). Le terme sphéromak n'est pas un synonyme de tokamak sphérique. Le sphéromak contient de grands courants électriques internes avec les champs magnétiques associés. Ils sont disposés de manière que les forces magnétohydrodynamiques à l'intérieur du sphéromak soient presque équilibrées, ce qui permet d'obtenir des temps de confinement de longue durée (microsecondes) sans champs externes. Les sphéromaks appartiennent à un type de configuration de plasma appelé tores compacts ou compact toroid. (fr) スフェロマック型 (Spheromak) は磁場閉じ込め方式核融合の一形式。 (ja) A spheromak is an arrangement of plasma formed into a toroidal shape similar to a smoke ring. The spheromak contains large internal electric currents and their associated magnetic fields arranged so the magnetohydrodynamic forces within the spheromak are nearly balanced, resulting in long-lived (microsecond) confinement times without external fields. Spheromaks belong to a type of plasma configuration referred to as the compact toroids. A spheromak can be made and sustained using magnetic flux injection, leading to a dynomak. (en) Lo spheromak è una configurazione del campo magnetico in cui la componente toroidale e quella poloidale hanno la stessa intensità. Lo spheromak è impiegato nell'ambito della ricerca sui reattori nucleari a fusione a confinamento magnetico, in questa modalità è possibile mantenere il plasma di fusione in equilibrio magnetoidrodinamico. La stabilizzazione del campo magnetico è largamente autogenerata attraverso le correnti del plasma arrivando a un plasma stabile e tipicamente toroidale. Il termine spheromak è anche usato per riferirsi alla configurazione stessa del plasma. (it) |
| rdfs:label | Sphéromak (fr) Spheromak (it) スフェロマック型 (ja) Spheromak (en) |
| owl:differentFrom | dbr:Spherical_tokamak |
| owl:sameAs | freebase:Spheromak wikidata:Spheromak dbpedia-fa:Spheromak dbpedia-fr:Spheromak dbpedia-it:Spheromak dbpedia-ja:Spheromak https://global.dbpedia.org/id/3fGdn |
| prov:wasDerivedFrom | wikipedia-en:Spheromak?oldid=1108271820&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/A_comparison_of_an_FRC_and_A_Spheromak.png wiki-commons:Special:FilePath/Spheromak_Formation_In_Dynomak_-_Model.png |
| foaf:isPrimaryTopicOf | wikipedia-en:Spheromak |
| is dbo:wikiPageWikiLink of | dbr:Electron_spiral_toroid dbr:List_of_fusion_power_technologies dbr:List_of_fusion_experiments dbr:Dynomak dbr:Index_of_physics_articles_(S) dbr:List_of_plasma_physics_articles dbr:Sustained_Spheromak_Physics_Experiment dbr:Masaaki_Yamada dbr:Fusion_power dbr:General_Fusion dbr:Plasmoid dbr:Compact_toroid dbr:Plasma_stability dbr:Taylor_state dbr:Hannes_Alfvén dbr:Field-reversed_configuration dbr:MARAUDER dbr:Magnetic_confinement_fusion dbr:Spherical_tokamak dbr:Toroidal_moment |
| is owl:differentFrom of | dbr:Spherical_tokamak |
| is foaf:primaryTopic of | wikipedia-en:Spheromak |
