Overview of the Helicity Injected Torus (HIT) program

The Helicity Injected Torus with Steady Inductive Helicity Injection (HIT-SI) consists of a “bowtie”-shaped axisymmetric confinement region, with two half-torus helicity injectors mounted on each side of the axisymmetric flux conserver [Sieck et al, IEEE Trans. Plasma Sci., v.33, p.723 (2005); Jarbo...

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Bibliographic Details
Published in:Journal of fusion energy 2007-06, Vol.26 (1-2), p.163-168
Main Authors: REDD, A. J, JARBOE, T. R, HAMP, W. T, NELSON, B. A, O'NEILL, R. G, SIECK, P. E, SMITH, R. J, SUTPHIN, G. L, WROBEL, J. S
Format: Article
Language:English
Subjects:
Applied sciences
Asymmetry
Confinement
Controled nuclear fusion plants
Discharge
Electrons
Energy
Energy. Thermal use of fuels
Equilibrium
Exact sciences and technology
Helicity
Injectors
Installations for energy generation and conversion: thermal and electrical energy
Toruses
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Summary:The Helicity Injected Torus with Steady Inductive Helicity Injection (HIT-SI) consists of a “bowtie”-shaped axisymmetric confinement region, with two half-torus helicity injectors mounted on each side of the axisymmetric flux conserver [Sieck et al, IEEE Trans. Plasma Sci., v.33, p.723 (2005); Jarboe, Fusion Technology, v.36, p.85 (1999)]. Current and flux are driven sinusoidally with time in each injector, with the goal of generating and sustaining an axisymmetric spheromak in the main confinement region. Improvements in machine conditioning have enabled systematic study of HIT-SI discharges with significant toroidal current ITOR, including cases in which this current ITOR switches sign one or more times during the discharge. Statistical studies of all HIT-SI discharges to date demonstrate a minimum injected power to form significant ITOR, and that the maximum ITOR scales approximately linearly with the total injected power.
ISSN:0164-0313
1572-9591
DOI:10.1007/s10894-006-9049-y