Astrophysical accretion processes near the black hole candidates, such as active galactic nuclei (AGN), X-ray binary (XRB), and other astrophysical sources, are associated with high-energetic emission of radiation relativistic particles outflows (winds or jets). It is widely believed that magnetic field plays a very important role to explain high energetic in vicinity those sources. In present ...

We analyze two designs for W-Band free electron lasers for application as laboratory instruments in the study of millimeter wave accelerators at high gradient. The first design is based on the linear induction accelerator LELIA (CEA/CESTA, France), employs a 1kA, 80-ns electron pulse, and corresponds to a helical TE11 200MW W-Band amplifier design. We analyze also a W-Band planar ubitron design...

This article presents the design and implementation of a software component for automated monitoring and diagnostic information analysis of a particle accelerator and its control system. The information that is analyzed can be seen as streams of events. A Complex Event Processing (CEP) approach to event processing was selected. The main advantage of this approach is the ability to continuously ...

The Breathing Circle is a 2-dimensional generalization of the Fermi Accelerator. It is shown that the billiard map associated to this model has invariant curves in phase space, implying that any particle will have bounded gain of energy.

This article developed an ion thruster optic system sputter erosion depth numerical 3D model by IFE-PIC (Immersed Finite Element-Particle-in-Cell) and Mont Carlo method, and calculated the downstream surface sputter erosion rate of accelerator grid; compared with LIPS-200 life test data. The results of the numerical model are in reasonable agreement with the measured data. Finally, we predicted...

A program for simulation of the dynamics of high intensity charged particle beams in linear particle accelerators has been developed in C++ using the POOMA Framework, for use on serial and parallel architectures. The code models the trajectories of charged particles through a sequence of different accelerator beamline elements such as drift chambers, quadrupole magnets, or RF cavities. An FFT-b...

The measurement of the transverse beam emittance is essential in any particle accelerator. This paper describes the problems of transverse emittance measurement for the new H LINAC being built at CERN as a replacement of the existing proton LINAC.

The first results from the Jinping Underground Nuclear Astrophysics particle accelerator refine a key reaction rate for destruction of fluorine in stars.