Non-inductive Solenoid-less Plasma Current Start-up in NSTX Using Transient CHI

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Coaxial Helicity Injection (CHI) has been successfully used in the National Spherical Torus Experiment (NSTX) for a demonstration of closed flux current generation without the use of the central solenoid. The favorable properties of the Spherical Torus (ST) arise from its very small aspect ratio. However, small aspect ratio devices have very restricted space for a substantial central solenoid. Thus methods for initiating the plasma current without relying on induction from a central solenoid are essential for the viability of the ST concept. CHI is a promising candidate for solenoid-free plasma startup in a ST. The method has now produced ... continued below

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Raman, R; Jarboe, T R; Nelson, B A; Bell, M G; Ono, M; Bigelow, T et al. May 23, 2007.

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Description

Coaxial Helicity Injection (CHI) has been successfully used in the National Spherical Torus Experiment (NSTX) for a demonstration of closed flux current generation without the use of the central solenoid. The favorable properties of the Spherical Torus (ST) arise from its very small aspect ratio. However, small aspect ratio devices have very restricted space for a substantial central solenoid. Thus methods for initiating the plasma current without relying on induction from a central solenoid are essential for the viability of the ST concept. CHI is a promising candidate for solenoid-free plasma startup in a ST. The method has now produced closed flux current up to 160 kA verifying the high current capability of this method in a large ST built with conventional tokamak components.

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  • Report No.: PPPL-4243
  • Grant Number: DE-ACO2-76CHO3073
  • Office of Scientific & Technical Information Report Number: 963549
  • Archival Resource Key: ark:/67531/metadc926266

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • May 23, 2007

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 13, 2016, 12:11 p.m.

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Raman, R; Jarboe, T R; Nelson, B A; Bell, M G; Ono, M; Bigelow, T et al. Non-inductive Solenoid-less Plasma Current Start-up in NSTX Using Transient CHI, report, May 23, 2007; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc926266/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.