ION BEAM PROPAGATION STABILITY IN A LINAC ACCELERATING CHANNEL BASED ON COMBINED RF-FOCUSING

The issue of simultaneous longitudinal and transverse particle propagation stability in a linear ion accelerator channel based on combined RF-focusing is investigated. Values for RFQ field gradient to provide transverse propagation stability for all the particles in an acceleration mode are calculated. It is also shown that electrical strength of the electrodes influences the gradient value. Much attention is given to modeling of an accelerating-focusing channel which provides the minimal growth in beam emittance.

Dependence of the Product's Phase Composition on the Ratio of Precursors in Plasmadynamic Synthesis of Silicon Carbide

In this work, the powder of nanoscale cubic SiC was obtained by the plasmodynamic synthesis in a coaxial magnetoplasma accelerator (CMPA) with a graphite central electrode and an accelerator channel. The synthesis method allows obtaining a product with a high content of nanoscale cubic silicon carbide. The work is aimed to study the influence of the precursor’s ratio on the product. The synthesized products were analyzed by X-ray diffraction and transmission electron microscopy.

Basis of the quasi-steady plasma accelerator theory in the presence of a longitudinal magnetic field

The analytic and numerical approaches to the investigation of the two-dimensional steady-state plasma flows are analyzed and compared with reference to a plasma accelerator channel in the presence of a longitudinal magnetic field. The present study continues a cycle of research into the plasma flows in the coaxial channels with the traditional azimuthal magnetic field. The additional longitudinal field opens new possibilities for controlling the dynamic processes and achieving the transonic flows. The research is based on the magnetohydrodynamic equations.