A 3D kinetic study of the plasma relaxation processes caused by the propagation of an electron beam in high-temperature plasma was carried out. The mathematical model is built on the basis of the Particle-in-Cell (PIC) method. The performance for supercomputers powered by both Intel Xeon processors and Nvidia Tesla GPUs (Graphic Processor Units) is given. It is shown that the particle motion st...

We use two different models to study the evolution of the coronal magnetic field which results from a simple photospheric field evolution. The first, the Minimum Current Corona (MCC), is a self-consistent model for quasi-static evolution which yields an analytic expression approximating the net coronal currents and the free magnetic energy stored by them. For the second model calculation, the n...

It is well recognized to ascribe the anomalous cross-field conductivity inside Hall-effect thrusters to fluctuation-induced transport due to gradient-driven instabilities (Rayleigh or electron drift) and to electron-wall interaction (near-wall conductivity). In this contribution we have performed a 2D(r,θ) Particle-in-Cell (PIC) model showing the possibility of another mechanism inducing azimut...

A three-dimensional (3-D) particle-in-cell (PIC) simulation of the whistler anisotropy instability is carried out for a collisionless, homogeneous, magnetized plasma with βe = 0.10. This is the first 3-D PIC simulation of the evolution of enchanced fluctuations from this growing mode driven by an anisotropic electron velocity distribution with T⟂e∕T∥e>1 where ⟂ and ∥ represent directions perpen...

photo paper on fi bre base support. Characteristics • ADOX MCC is an all-purpose B/W enlarging paper, whose contrast can be varied with colour fi lters. • If the standard contrast control fi lters are used, it is possible to vary the contrast simply, without the trouble of converting the exposure times. • The contrast range is similar to that of conventional fi xed-contrast papers. ADOX MCC can...

In this paper, the limitations of two-dimensional magnetic field configuration for an annular ion thruster are analyzed theoretically and numerically. The field, which is commonly used in traditional thrusters, has been proved to be a very effective way confinement primary electrons ions. Hence, characteristics ions with first theoretically. Then, according analysis, designed. On basis, discuss...

Multiple antenna systems have a potential to provide a high capacity in wireless communication systems. The spectral efficiency of space time trellis coding (STTC) is limited by the encoder structure. The layered space time (LST) architecture can overcome this problem. Three different LST schemes are presented. An improved iterative parallel interference canceller (PIC) method is applied at the...

We present a novel stochastic model for claims reserving that allows to combine claims payments and incurred losses information. The main idea is to combine two claims reserving models (Hertig’s model [11] and Gogol’s model [8]) leading to a log-normal paid-incurred chain (PIC) model. Using a Bayesian point of view for the parameter modelling we derive in this Bayesian PIC model the full predic...

In this paper linear parallel interference cancellation (PIC) schemes are described and analysed using matrix algebra. It is shown that the linear PIC, whether conventional or weighted, can be seen as a linear matrix filter applied directly to the chip-matched filtered received signal vector. An expression for the exact bit error rate is obtained and conditions on the eigenvalues of the code co...