Progress in the SSPX Spheromak

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dc.contributor.authorMcLean, H. S.
dc.contributor.authorWoodruff, S.
dc.contributor.authorHill, D. N.
dc.contributor.authorBulmer, R. H.
dc.contributor.authorCohen, B. I.
dc.contributor.authorHooper, E. B.
dc.contributor.authorMoller, J.
dc.contributor.authorRyutov, D. D.
dc.contributor.authorStallard, B. W.
dc.contributor.authorWood, R. D.
dc.contributor.authorHolcomb, C. T.
dc.contributor.authorJarboe, T. R.
dc.contributor.authorRomero-Talamás, Carlos
dc.contributor.authorBellan, P. M.
dc.date.accessioned2024-01-25T09:47:25Z
dc.date.available2024-01-25T09:47:25Z
dc.date.issued2003-07-07
dc.description30th EPS Conference on Controlled Fusion and Plasma Physics, St. Petersburg, Russia, Jul 07 - Jul 11, 2003
dc.description.abstractThe spheromak [1], with its simply connected geometry, holds promise as a less expensive fusion reactor. It has reasonably good plasma beta and can be formed and sustained in steady state with a magnetized coaxial plasma gun. The Sustained Spheromak Physics Experiment [2] (SSPX) shown in Fig. 1 was constructed to investigate the key issues of magnetic field generation and energy confinement. In addition to the coaxial gun, nine magnetic field coils are utilized to shape the vacuum magnetic flux. This flexibility allows operation in many different regimes producing very different plasma characteristics. Pulse length is extended and magnetic field strength is increased. Improved surface conditioning produces plasmas with low impurity content, and higher electron temperature, Te. Electron heat transport within the separatrix is reduced by a factor of 4. The results strongly suggest the existence of closed flux surfaces even though the plasma is connected to the coaxial source. The CORSICA Grad-Shafranov 2-d equilibrium code [2] with data from edge magnetic probes along with Te and electron density ne from Thomson scattering is used to calculate internal profiles: normalized current λ= µ₀J/B, safety factor = q, ohmic heating, thermal energy density, and thermal diffusivity =χe. Ohmic heating is calculated by assuming spatially constant Spitzer resistivity with Zeff = 2.3 estimated by VUV spectroscopy.
dc.description.sponsorshipThis work was performed under the auspices of US DOE by the University of California Lawrence Livermore National Laboratory under Contract No. W-7405-ENG-4
dc.description.urihttps://www.osti.gov/biblio/15004421
dc.format.extent6 pages
dc.genreconference papers and proceedings
dc.genrepreprints
dc.identifier.citationMcLean, H S, Woodruff, S, Hill, D N, Bulmer, R H, Cohen, B I, Hooper, E B, Moller, J, Ryutov, D D, Stallard, B W, Wood, R D, Holcomb, C T, Jarboe, T R, and Romero-Talamas, C. 2003. "Progress in the SSPX Spheromak". United States. https://www.osti.gov/servlets/purl/15004421.
dc.identifier.urihttp://hdl.handle.net/11603/31476
dc.language.isoen_US
dc.publisherU.S. Department of Energy
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Mechanical Engineering Department Collection
dc.rightsThis is a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain Mark 1.0 en
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.titleProgress in the SSPX Spheromak
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0002-6830-3126

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