Scale-up of spherical tokamak solenoid-free startup by coaxial helicity injection

Journal Article · Mon Oct 15 00:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2798052· OSTI ID:21057410

Tang, X Z; Boozer, A H ^[1]

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1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Current multiplication and flux amplification are two critical measures in assessing the usefulness of magnetic helicity injection for forming the plasma confining magnetic field in laboratory spheromak and spherical tokamak (ST) experiments. While the two concepts are closely related for spheromaks, they are independent for a Taylor-relaxed ST plasma, and negatively correlated for a more realistic, partially relaxed ST plasma. An important application of this understanding leads to the so-called relaxed transient coaxial helicity injection scheme for solenoid-free ST startup, which can deliver reactor-grade high current multiplication and flux amplification.

• OSTI ID: 21057410
• Journal Information: Physics of Plasmas, Vol. 14, Issue 10; Other Information: DOI: 10.1063/1.2798052; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLIFICATION
CURRENTS
HELICITY
MAGNETIC FIELDS
OPERATION
PLASMA
SOLENOIDS
SPHERICAL CONFIGURATION
SPHEROMAK DEVICES
THERMONUCLEAR REACTORS
TRANSIENTS