Momentum-transport studies in high E×B shear plasmas in the national spherical torus experiment

TY - JOUR

T1 - Momentum-transport studies in high E×B shear plasmas in the national spherical torus experiment

AU - Solomon, W. M.

AU - Kaye, S. M.

AU - Bell, R. E.

AU - Leblanc, B. P.

AU - Rewoldt, G.

AU - Wang, W.

AU - Levinton, F. M.

AU - Yuh, H.

AU - Sabbagh, S. A.

PY - 2008/8/7

Y1 - 2008/8/7

N2 - Experiments have been conducted at the National Sperical Torus Experiment (NSTX) to study both steady state and perturbative momentum transport. These studies are unique in their parameter space under investigation, where the low aspect ratio of NSTX results in rapid plasma rotation with E×B shearing rates high enough to suppress low-k turbulence. In some cases, the ratio of momentum to energy confinement time is found to exceed five. Momentum pinch velocities of order 10-40m/s are inferred from the measured angular momentum flux evolution after nonresonant magnetic perturbations are applied to brake the plasma.

AB - Experiments have been conducted at the National Sperical Torus Experiment (NSTX) to study both steady state and perturbative momentum transport. These studies are unique in their parameter space under investigation, where the low aspect ratio of NSTX results in rapid plasma rotation with E×B shearing rates high enough to suppress low-k turbulence. In some cases, the ratio of momentum to energy confinement time is found to exceed five. Momentum pinch velocities of order 10-40m/s are inferred from the measured angular momentum flux evolution after nonresonant magnetic perturbations are applied to brake the plasma.

UR - https://www.scopus.com/pages/publications/49749126748

UR - https://www.scopus.com/pages/publications/49749126748#tab=citedBy

U2 - 10.1103/PhysRevLett.101.065004

DO - 10.1103/PhysRevLett.101.065004

M3 - Article

C2 - 18764464

SN - 0031-9007

VL - 101

JO - Physical review letters

JF - Physical review letters

IS - 6

M1 - 065004

ER -