Extended theory of main ion and impurity rotation and bootstrap current in a shear layer

Conference · Mon Nov 01 04:00:00 EST 1993

OSTI ID:10170063

Kim, Y B; Hinton, F L; John, H; Taylor, T S; Wroblewski, D ^[1]

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1. General Atomics, San Diego, CA (United States)

In this paper, standard neoclassical theory has been extended into the shear layer. Main ion and impurity ion rotation velocity and bootstrap current within shear layer in H-mode are discussed. Inside the H-mode shear layer, standard neoclassical theory is not valid since the ion poloidal gyroradius becomes comparable to pressure gradient and electric field gradient scale length. To allow for arbitrary ratio of {rho}{theta}i/L{sub n} and {rho}{theta}i/L{sub Er} a new kinetic theory of main ion species within electric field shear layer has been developed with the assumption that {rho}{theta}i/R{sub o} is still small. As a consequence, both impurity flows and bootstrap current have to be modified. We present modified expressions of impurity flows and bootstrap current are presented neglecting ion temperature gradient. Comparisons with DIII-D measurements are also discussed.

• Research Organization: General Atomics, San Diego, CA (United States); Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG03-92ER54150; AC03-89ER51114; W-7405-ENG-48
• OSTI ID: 10170063
• Report Number(s): GA-A--21522; CONF-9311147--10; ON: DE94015857; BR: 35AT05000/AT0520210; 35AT10020/35KC07000
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330
BOOTSTRAP CURRENT
DOUBLET-3 DEVICE
H-MODE PLASMA CONFINEMENT
MAGNETIC FLUX
NEOCLASSICAL TRANSPORT THEORY
PLASMA IMPURITIES
PLASMA KINETICS, TRANSPORT, AND IMPURITIES
PRESSURE GRADIENTS
SHEAR PROPERTIES