In this paper we simulate semiclassical corrections to classical dynamics by suitable classical stochastic uctuations, then we apply it to the speciic instance of charged beams in particle accelerators. The resulting picture is that the collective beam dynamics, at the leading semiclassical order in Planck constant can be described by a particular diiusion process, the Nelson process, that is t...

We describe a hybrid data-representation and rendering technique for visualizing large-scale particle data generated from numerical modeling of beam dynamics. The basis of the technique is mixing volume rendering and point rendering according to particle density distribution, visibility, and the user’s instruction. A hierarchical representation of the data is created on a parallel computer, all...

The high spatial resolution needed in self-consistent particle simulations can be achieved using adaptive mesh refinement techniques (AMR). In this paper the code SMOVE which is based on such an adaptive mesh is presented. It allows for accurate simulations with a high spatial resolution in the vicinity of the particle bunches. Furthermore, it offers the possibility of simulating long accelerat...

Charged particle beam dynamics including space charge and image forces were simulated with a newly developed code. The formalism for this new code is based on the template potential technique and can be employed for computational approaches ranging from envelope equations to particle-in-cell (PIC) models in either two(2D) or three-dimensional (3D) geometries. While the method is not completely ...

General Particle Tracer (GPT) is a particle tracking code, which includes 3D space charge effect based on a nonequidistant multigrid Poisson solver or a point-to-point method. It is used to investigate beam dynamics in ERL and FEL injectors. We have developed a new routine to simulate coherent synchrotron radiation (CSR) in GPT based on the formalism of Sagan [1]. The routine can calculate 1D-w...

in this paper a novel direct adaptive fuzzy system is proposed to control flexible-joints robot including actuator dynamics. the design includes two interior loops: the inner loop controls the motor position using proposed approach while the outer loop controls the joint angle of the robot using a pid control law. one novelty of this paper is the use of a pso algorithm for optimizing the contro...

This paper reviews results obtained from recent analytical and numerical investigations of chaotic behavior and halo development induced by charge density inhomogeneities in the transverse dynamics of heavy ion beams. In particular, a test-particle model is used to investigate the charged-particle dynamics in an intense, matched, heavy ion beam with nonuniform density profile propagating throug...