Comparison of measured impurity poloidal rotation in DIII-D with neoclassical predictions under low toroidal field conditions
نویسندگان
چکیده
منابع مشابه
Comparison of neoclassical predictions with measured flows and evaluation of a poloidal impurity density asymmetry
The study and prediction of velocities in the pedestal region of Alcator CMod are important for understanding plasma confinement and transport. In this study we examine the simplified neoclassical predictions for impurity flows using equations developed for plasmas with background ions in the Pfirsch-Schlüter (high collisionality) and banana (low collisionality) regimes. B flow profiles for H-m...
متن کاملIndirect measurement of poloidal rotation using inboard–outboard asymmetry of toroidal rotation and comparison with neoclassical predictions
An alternative experimental spectroscopic measurement of poloidal plasma rotation in toroidally confined plasmas is proven effective in the TCV tokamak. Charge exchange recombination measurements of the toroidal rotation profile over the full mid-plane plasma diameter are used to infer the complete bi-dimensional flow structure of the intrinsic C6+ impurity, which includes its poloidal componen...
متن کاملCalculation of impurity poloidal rotation from measured poloidal asymmetries in the toroidal rotation of a tokamak plasma.
To improve poloidal rotation measurement capabilities on the DIII-D tokamak, new chords for the charge exchange recombination spectroscopy (CER) diagnostic have been installed. CER is a common method for measuring impurity rotation in tokamak plasmas. These new chords make measurements on the high-field side of the plasma. They are designed so that they can measure toroidal rotation without the...
متن کاملIV . Calculation of toroidal rotation profiles in DIII - D using neoclassical viscosity
IV. Calculation of toroidal rotation profiles in DIII-D using neoclassical viscosity (DoE Grant ER54538) W. M. Stacey, R. W. Johnson and J. Mandrekas (to be published in Physics of Plasmas, 2006) Abstract Momentum and particle balance and neoclassical viscosity were applied to calculate the radial profile of toroidal rotation in several DIII-D [J. Luxon, Nucl. Fusion, 42, 614 (2002)] discharges...
متن کاملModification to the Toroidal Rotation Velocity and Radial Electric Field by Pellet Injection in DIII-D
The ability to modify and control the radial electric field and its radial derivative can lead to direct control of radial transport of plasma in a toroidal device. In the DIII-D tokamak, the injection of deuterium pellets is being investigated as a means of controlling the toroidal rotation velocity and the radial electric field, Er. Solid deuterium cylindrical pellets of 1.8mm and 2.7mm diame...
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ژورنال
عنوان ژورنال: Nuclear Fusion
سال: 2014
ISSN: 0029-5515,1741-4326
DOI: 10.1088/0029-5515/54/8/083020