Ultra low aspect ratio stellarator or hybrid configurations

P. E. Moroz, D. B. Batchelor, B. A. Carreras, S. P. Hirshman, D. K. Lee, V. E. Lynch, D. A. Spong, J. S. Tolliver, A. S. Ware, J. C. Whitson

    Research output: Contribution to journalConference articlepeer-review

    Abstract

    Novel concepts of an ultra-low-aspect-ratio stellarator system, called a Spherical Stellarator (SS), or a stellarator-tokamak hybrid system, called SMARTH (Small Aspect Ratio Toroidal Hybrid) are discussed for high-β regimes of operation. Self-consistent analysis of the three-dimensional MHD equilibria with inductively driven plasma current or bootstrap current is presented. It is stressed that the bootstrap current in SS can be large and is flowing in such a direction that the rotational transform produced enhances the vacuum rotational transform. This feature increases the equilibrium β-limit. The high-β equilibria in SS and SMARTH (β(0) > 30%, β̄ ≈ 8-9%) are demonstrated, correspondingly, with the bootstrap current and the ohmic current. Possible experiments and scalings, including those for reactor parameters, are outlined.

    Original languageEnglish
    Pages (from-to)1347-1354
    Number of pages8
    JournalFusion Science and Technology
    Volume30
    Issue number3
    DOIs
    StatePublished - 1996
    EventProceedings of the 1996 12th Topical Meeting on the Technology of Fusion Energy. Part 2 (of 2) - Reno, NV, USA
    Duration: Jun 16 1996Jun 20 1996

    Fingerprint

    Dive into the research topics of 'Ultra low aspect ratio stellarator or hybrid configurations'. Together they form a unique fingerprint.

    Cite this