689 research outputs found
Numerical analysis of magnetic field diffusion in ferromagnetic laminations by minimization of constitutive error
No full textAn approach to information propagation in 1-D cellular neural networks - Part II: Global propagation
No full textThis second of two papers [1] studies how and when a global propagation of information, introduced as initial condition, is possible through a one-dimensional (1-D) Cellular Neural Network (CNN) with connections between nearest neighbors only. We will focus on circular arrays, which have the most regular structure, we will show that periodic solutions exist, and we will compute one of them analytically. We will also study their stability. © 1998 IEEE
Optimization of the SLED phase modulation parameters of the FERMI Linac
No full textFERMI is a single-pass linac-based FEL user-facility covering the wavelength range from 80 nm to 4 nm and is located next to the third generation synchrotron radiation facility Elettra in Trieste, Italy. The first FEL line in operation (FEL-1) has been opened to users at the end of 2012, while the second FEL line (FEL-2) covering the shorter wavelength range down to 4 nm is in commissioning. The linac is composed of 16 S-band accelerating structures. Seven of them are backward structures equipped with SLED system. Following the preliminary tests on one plant, in order to increase the operational accelerating gradient, phase modulation of the SLED drive power has been implemented in all these structures. The shape of the phase modulation is applied via the LLRF system firmware and can be modified if needed. This paper discusses the optimization of the phase modulation parameters and provides a summary of the experimental results
Deformations of polarizable fluids subject to stationary electromagnetic fields
No full textIEEE TRANSACTIONS ON MAGNETIC
Thermally activated domain wall dynamics in a disordered magnetic nanostrip
No full textWe consider the effect of disorder on the dynamics of a transverse domain wall in thin and narrow magnetic strips made of soft magnetic materials such as permalloy. Motivated by the micromagnetic description of such a domain wall, we construct a model based on two coupled flexible lines enclosing the domain wall transition region. The model captures both the finite width and the characteristic V-shape of the wall. Disorder is included via randomly distributed pinning centers interacting with the two lines, describing, e. g., thickness fluctuations of the strip. We study the thermally activated creep motion of the domain wall driven by an applied field in a disordered nanostrip, and demonstrate how such inherently stochastic motion leads to a broad distribution of the domain wall velocities, in agreement with experimental observations. (C) 2011 American Institute of Physics. [doi:10.1063/1.3565402
- …
