Finite pressure equilibrium effects on helical ripple transport in torsatrons

V. E. Bykov; D. L. Grekov; A. A. Shishkin; L. Garcia; J. H. Harris; J. A. Rome

doi:10.1088/0029-5515/28/5/011

Finite pressure equilibrium effects on helical ripple transport in torsatrons

V. E. Bykov, D. L. Grekov, A. A. Shishkin, L. Garcia, J. H. Harris, J. A. Rome

Power Exhaust and Particle Control

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2 Scopus citations

Abstract

A three-dimensional equilibrium code (NEAR) is used to study plasma equilibrium in torsatron configurations having various winding laws. The harmonic spectra describing the variation of B along magnetic field lines are calculated at finite plasma pressure and then used to calculate the geometric factors that determine the magnitudes of the neoclassical transport coefficients in the helical ripple trapping regime, where the particle and heat fluxes are inversely proportional to the collision frequency. The results show that an appropriate choice of winding law can reduce helical ripple transport by a factor of about 2 in the vacuum field and at high plasma pressure.

Original language	English
Pages (from-to)	871-879
Number of pages	9
Journal	Nuclear Fusion
Volume	28
Issue number	5
DOIs	https://doi.org/10.1088/0029-5515/28/5/011
State	Published - May 1988

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abstract = "A three-dimensional equilibrium code (NEAR) is used to study plasma equilibrium in torsatron configurations having various winding laws. The harmonic spectra describing the variation of B along magnetic field lines are calculated at finite plasma pressure and then used to calculate the geometric factors that determine the magnitudes of the neoclassical transport coefficients in the helical ripple trapping regime, where the particle and heat fluxes are inversely proportional to the collision frequency. The results show that an appropriate choice of winding law can reduce helical ripple transport by a factor of about 2 in the vacuum field and at high plasma pressure.",

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AU - Bykov, V. E.

AU - Grekov, D. L.

AU - Shishkin, A. A.

AU - Garcia, L.

AU - Harris, J. H.

AU - Rome, J. A.

PY - 1988/5

Y1 - 1988/5

N2 - A three-dimensional equilibrium code (NEAR) is used to study plasma equilibrium in torsatron configurations having various winding laws. The harmonic spectra describing the variation of B along magnetic field lines are calculated at finite plasma pressure and then used to calculate the geometric factors that determine the magnitudes of the neoclassical transport coefficients in the helical ripple trapping regime, where the particle and heat fluxes are inversely proportional to the collision frequency. The results show that an appropriate choice of winding law can reduce helical ripple transport by a factor of about 2 in the vacuum field and at high plasma pressure.

AB - A three-dimensional equilibrium code (NEAR) is used to study plasma equilibrium in torsatron configurations having various winding laws. The harmonic spectra describing the variation of B along magnetic field lines are calculated at finite plasma pressure and then used to calculate the geometric factors that determine the magnitudes of the neoclassical transport coefficients in the helical ripple trapping regime, where the particle and heat fluxes are inversely proportional to the collision frequency. The results show that an appropriate choice of winding law can reduce helical ripple transport by a factor of about 2 in the vacuum field and at high plasma pressure.

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VL - 28

SP - 871

EP - 879

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 5

ER -

Finite pressure equilibrium effects on helical ripple transport in torsatrons

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