Impurity toroidal rotation has been observed in the centre of Alcator C-Mod ion cyclotron range of frequencies (ICRF) heated plasmas, from the Doppler shifts of argon X ray lines. Rotation velocities greater than 1.2×10 cm/s (ω = 200 krad/s) in the co-current direction have been observed in H mode discharges that had no direct momentum input. There is a correlation between the increase in the c...

Multicomponent reactions are valuable synthetic tools to deliver highly functionalized motifs starting from simple building blocks in only one step and an atom-economical way. Herein we disclose the structure of a new unexpected compound, methyl 5-imino-2-methyl-1,10a-dihydro-5H-chromeno[2,3-b]pyridine-3-carboxylate, which was formed ohmic-heating-assisted multicomponent Hantzsch reaction 3-for...

Analytic and Numerical Studies of a Tectonics Model for Solar Coronal Heating Chung-Sang Ng1, A. Bhattacharjee1 1University of New Hampshire. Presentation Number: 14.04 Recent observations have shown that the solar surface is covered with a so-called “magnetic carpet”, in which small-scale magnetic flux loops are continually emerging and interacting. The magnetic flux at the photosphere is thus...

Numerical simulations of sawteeth in tokamaks have been carried out using reduced magnetohydrodynamics and a simple transport model. The electron temperature is evolved self-consistently, including Ohmic heating and a highly anisotropic thermal diffusivity. The sawtooth period and collapse time found in the simulations for Lundquist numbers S below 10 compare favourably with experimental result...

The nature of fast magnetoacoustic and Alfvén waves is investigated in a zero β plasma. This gives an indication of wave propagation in the low β solar corona. It is found that for a two-dimensional null point, the fast wave is attracted to that point and the front of the wave slows down as it approaches the null point, causing the current density to accumulate there and rise rapidly. Ohmic dis...

NCSX has been designed to accommodate a variety of heating systems, including ohmic heating, neutral beam injection, and RF. Neutral beams will provide one of the primary heating methods for NCSX. In addition to plasma heating, neutral beams are also expected to provide a means for external control over the level of toroidal plasma rotation velocity and its profile. The experimental plan requir...