feinstein r leon (1 Ergebnisse)

Wraps. Zustand: Very good. Presumed First Edition, First printing. 60 pages. Formulae. Figures. The results of this preliminary study suggested that the light-ion, low-y beam may have a hose stability advantage over a comparable electron beam. The authors explore the resistive hose instability with longitudinal velocity spread. For energies of interest, the theoretical models of electron beam propagation, cannot be directly applied to ions because of their low relativistic gamma factors. If the beam propagates in the longitudinal direction (along the z-axis), the effective inertial mass of the beam particles in the z direction is given approximately by gamma cubed m, where m is the particle test mass. This suggests that light ions are considerably more susceptible to longitudinal acceleration than electrons of equivalent kinetic energy; the longitudinal particle motion cannot be ignored as in the electron case. This adds a new dimension to ion beam propagation. The consequences of the longitudinal motion on beam stability can divided into three categories: (1) longitudinal spreading of the beam pulse due to longitudinal velocity spread; (2) longitudinal mass (bunching) instability; and (3) resistive hose instability with longitudinal velocity spread.