Alfvén wave propagation in an initial value magnetohydrodynamic (MHD) simulation is reported. The simulation result is compared with the theoretical shear Alfvén wave dispersion relation both in a cylindrical geometry and in a toroidal geometry. Generation of the toroidicity induced Alfvén eigenmode (TAE) frequency gap is observed in the presence of 1/R variation of the toroidal magnetic field....

The in uence of the toroidal geometry, and the plasma column displacement, over the usual tokamak poloidal magnetic eld con guration was investigated for circular plasmas through a series of simulations. The results obtained clearly showed the existence of a change in phase modulation of the Mirnov signals, which are not usually considered when the magnetic signals are Fourier analyzed in the f...

In the present study, the aim is to optimize full and half toroidal continuously variable transmission (CVT) in order to minimize the vehicle fuel consumption (FC) in ECE driving cycle. First, the model of both CVTs’ efficiency is presented. The control strategy of CVTs speed ratio based on minimizing the vehicle FC is introduced, and the algorithm of calculating the vehicle FC is shown. Afterw...

The resistive wall mode ~RWM! poses a threat to many plasma confinement devices. The continuous rotation of the wall relative to the plasma makes it appear perfectly conducting, because of the skin effect, but this is ineffective if the perturbation locks to the wall. This raises the question of whether a nonuniformly rotating wall is more effective. In this paper we discuss the effect of such ...

Three codes that solve the gyrokinetic equation in toroidal geometry are compared in the linear limit for the growth rates and real frequencies of the ion temperature gradient (ITG) mode and the trapped electron mode (TEM). The three codes are the gyrokinetic toroidal code (GTC) and GT3D, both of which are radially-global particle-in-cell initial-value codes, and FULL, which is a radially-local...

The strength of optomechanical interactions in a cavity optomechanical system can be quantified by a vacuum coupling rate g0 analogous to cavity quantum electrodynamics. This single figure of merit removes the ambiguity in the frequently quoted coupling parameter defining the frequency shift for a given mechanical displacement, and the effective mass of the mechanical mode. Here we demonstrate ...

The stability of Alfvén eigenmodes (AEs) is studied experimentally in the JET tokamak by observing the plasma response to antenna-driven frequency-sweeping perturbations at the plasma edge. During the 2008/9 experimental campaigns, the complete set of the new antennas was operated and AEs with toroidal mode numbers (n) in the intermediate-n range were excited under various plasma conditions. In...

Tertiary structure changes in DNA duplexes, induced by Hoechst 33258 binding, have been examined by the use of atomic force microscopy. Besides minor groove binding, which is an established mode of binding for this drug, Hoechst 33258 has now been found to show another binding mode, which causes an unwinding of the duplex. When the drug concentration is as high as 0.5 microg/ml, the Hoechst 332...

Ohmic H-modes have been achieved in Alcator C-Mod with toroidal fields up to BT5.25 T and line averaged densities up to n e 1.4 x 1020 m-3 with less than 1 MW of input power. In ELM-free cases at lower toroidal field, the energy confinement increases by at least 60% and the particle confinement increases by more than a factor of two. The ELM-free H-modes appear to fit the threshold power scalin...