带电粒子束自生力对束流扩散的影响

带电粒子束由于受到静电斥力作用 ,它在传输时总是扩散的。本文根据相对论的罗仑兹变换以及牛顿运动定律 ,研究了带电粒子束在其自生空间电荷力作用下通过外层空间的真空中传输时的扩散现象 ,得出了粒子束传输的扩散方程 ,提出了一种计算粒子束扩散半径的方法。然后讨论了影响粒子束传输的各种因素 ,包括粒子束类型、能量、束流、出口初始束半径以及散角等。最后从传输技术角度指出了宜选择高能小流初始半径大的电子束 ,研究结果不仅同国外研究相符合 ,而且将为研究粒子束传输技术提供科学依据。

Research of Effect of Self-generated Space Charge Force of Charged Particle Beams on Its Radical Spread

The charged particle beam tends to diverge and disperse when it propagates beyond the exit port of the accelerator owing to the mutually repulsive force exerted by the beam's similarly charged particles. The authors study the spreading of charged particle beams propagating in the vacuum of outer space in the effect of self-generated space charge force on the basis of the Lorentz Transformation of the Relativity Theory and Newtonian Mechanics, deduce a spread equation of propagation of charged particle beams, and present a method calculating the beam spreading radius. Then, the influences of the beam types, beam energy, beam current, initial radius and divergent angle on the beam propagation are discussed briefly. Finally ,we point out that the electron beam with a high energy, weak current and big initial radius must be chosen as a weapon from a point of view of propagation technology . The results of the study are not only in agreement with open data now, but also provide a scientific basic for studying beam propagation technology .