High Non-inductive Fraction H-mode Discharges Generated by High-harmonic Fast Wave Heating and Current Drive in the National Spherical Torus Experiment

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3699364· OSTI ID:1038500

Taylor, G. ^[1]; Hosea, J. ^[1]; Kessel, C. E. ^[1]; LeBlanc, B ^[1]; Mueller, D. ^[1]; Phillips, C. K. ^[1]; Valeo, E. J. ^[1]; Wilson, J. R. ^[1]; Ryan, Philip Michael ^[2]; Bonoli, P. ^[3]; Harvey, R. W. ^[4]

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1. Princeton Plasma Physics Laboratory (PPPL)
2. ORNL
3. Massachusetts Institute of Technology (MIT)
4. CompX, Del Mar, CA

A deuterium H-mode discharge with a plasma current of 300 kA, an axial toroidal magnetic field of 0.55 T, and a calculated non-inductive plasma current fraction of 0.7 1 has been generated in the National Spherical Torus Experiment by 1.4MW of 30MHz high-harmonic fast wave (HHFW) heating and current drive. Seventy-five percent of the non-inductive current was generated inside an internal transport barrier that formed at a normalized minor radius 0.4. Three quarters of the non-inductive current was bootstrap current, and the remaining non-inductive current was generated directly by HHFW power inside a normalized minor radius 0.2. VC 2012 American Institute of Physics.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1038500
• Journal Information: Physics of Plasmas, Vol. 19, Issue 4; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOOTSTRAP CURRENT
DEUTERIUM
ELECTRIC CURRENTS
HEATING
MAGNETIC FIELDS
PHYSICS
TRANSPORT