Demonstration of Tokamak Ohmic Flux Saving by Transient Coaxial Helicity Injection in the National Spherical Torus Experiment
- University of Washington, Seattle, Washington (United States)
- Princeton Plasma Physics Laboratory, Princeton, New Jersey (United States)
- Oak Ridge National Laboratory, Oak Ridge, Tennessee (United States)
- Columbia University, New York, New York (United States)
- Lawrence Livermore National Laboratory, Livermore, California (United States)
Transient coaxial helicity injection (CHI) started discharges in the National Spherical Torus Experiment (NSTX) have attained peak currents up to 300 kA and when coupled to induction, it has produced up to 200 kA additional current over inductive-only operation. CHI in NSTX has shown to be energetically quite efficient, producing a plasma current of about 10 A/J of capacitor bank energy. In addition, for the first time, the CHI-produced toroidal current that couples to induction continues to increase with the energy supplied by the CHI power supply at otherwise similar values of the injector flux, indicating the potential for substantial current generation capability by CHI in NSTX and in future toroidal devices.
- OSTI ID:
- 21386834
- Journal Information:
- Physical Review Letters, Vol. 104, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.104.095003; (c) 2010 The American Physical Society; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Demonstration of Tokamak Ohmic Flux Saving by Transient Coaxial Helicity Injection on NSTX
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