A magnetically enhanced plasma chemical vapor deposition (MEPCVD) system has been developed for the deposition of DLC ®lm without deterioration of the ®lm quality. A perpendicular magnetic ®eld (B) to the electric ®eld was applied in the RF capacitively coupled plasma enhanced (PE) CVD system. Signi®cantly higher levels of ionization are achieved in the MEPCVD system, resulting in much lower se...

Techniques for modeling hysteresis and material nonlinearities in magnetostrictive materials are presented. Hys-teresis in these materials is due to both the driving magnetic eld and stress relations within the material and is signiicant throughout most of the drive range of the material. Two characterizations are presented here. The rst model is posed in terms of Preisach operators and is pure...

We study the behavior at in nity, with respect to the space variable, of solutions to the magnetohydrodynamics equations in Rd. We prove that if the initial magnetic eld decays su ciently fast, then the plasma ow behaves as a solution of the free nonstationnary Navier Stokes equations when |x| → +∞, and that the magnetic eld will govern the decay of the plasma, if it is poorly localized at the ...

We discuss the problem of static chaos in spin glasses. In the case of magnetic eld perturbations, we propose a scaling theory for the spin-glass phase. Using the meaneld approach we argue that some pure states are suppressed by the magnetic eld and their free energy cost is determined by the nite-temperature xed point exponents. In this framework, numerical results suggest that meaneld chaos e...

We have observed six high-mass star-forming regions in the Π3/2, J = 7/2 lines of OH using the GBT in order to investigate whether the magnetic field, and hence the density, measured in absorption differs from that implied by maser Zeeman splitting. We detect absorption in both the 13441 and 13434 MHz main lines in all six sources. Zeeman splitting in the F = 3 → 3 absorption line in W3(OH) imp...

The natural occurrence of small scale structures and the extreme anisotropy in the evolution of a magnetic eld embedded in a conducting ow is interpreted in terms of the properties of the local Lyapunov exponents along the various local characteristic (un)stable directions for the Lagrangian ow trajectories. The local Lyapunov exponents and the characteristic directions are functions of Lagrang...

Numerical simulations of hydromagnetic turbulence in the presence of shear and/or convection have given us new clues as to how the solar dynamo might work. Simulations suggest that here is signiicant large-scale magnetic eld generation at the bottom of the convection zone, where the radial shear is largest. The nature of the dynamo in the simulations seems to be qualitatively similar to an-dyna...

Phase III upgrade of CESR includes super conducting magnets without iron. The magnets are built from super conducting wire loops wrapped on a pipe. Because of the high currents involved in super conducting magnets, the distortion of the magnetic elds at the rounded ends may not be negligible and should be calculated. The gradual decrease in the magnetic eld at the edges causes higher order mult...

A method for reconstructing tracks in the inhomogeneous magnetic eld of the HERA-B spectrometer has been developed. It is based on an extension of the Concurrent Track Evolution method, which was originally introduced for pattern recognition in the pattern tracker 1]. The method uses now three-dimensional propagation, with special measures necessary to achieve fast transport in the presence of ...

Collapse of the rotating magnetized molecular cloud core is studied with the axisymmetric magnetohydrodynamical (MHD) simulations. Due to the change of the equation of state of the interstellar gas, the molecular cloud cores experience several different phases as collapse proceeds. In the isothermal run-away collapse (n ∼< 10 H2 cm ), a pseudo-disk is formed and it continues to contract till th...