摘要
傍轴近似下带电粒子束传输可完全类比于近轴光线椭圆高斯光束的传输。基于这种类比,建立了带电粒子束传输中横向发散的复曲率半径的类ABCD定律,引入了带电粒子在横向的复曲率半径的概念,并以复曲率半径的实部表征带电粒子束的敛散特性,虚部表征带电粒子束的束斑大小。由此提出:带电粒子束整体可被看作类椭圆高斯光束,其发射度与光束波长的作用相同。通过这种类比可知,在适宜的加速器环境下,理论上可能产生相干带电粒子束。
It is shown that the propagation of charged-particle beam can be made in complete analogy with the transmission of ellipse-Gaussian light beam in paraxial approximation. Based on this similarity, the ABCD-like law for charged-particle beam transport with transversal divergence is developed by means of a complex curvature radius of charged-particle beam in which its real part shows the beam characteristics of convergent and divergent and its imaginary part shows the beam radius. From this, charged-particle beam as a whole is thought of as a single ellipse Gaussian light-like beam whose emittance plays the role of wavelength. In particular, this analogy gives an insight that it is hopeful to attain possible coherent charged-particle beam in favorable accelerator environment.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2004年第10期1331-1333,共3页
High Power Laser and Particle Beams
