Self-pinching of a relativistic electron bunch in a drift tube
Abstract
Electron bunches with charge densities of the order of to [nC/cm], energies between and [MeV], peak current [A], bunch lengths between 0.3 and 1.8 [cm], and bunch charge of 2.0 to [nC] are relevant to the design of Free Electron Lasers and future linear colliders. In this paper we present the results of numerical simulations performed with a particle in a cell (pic) code of an electron bunch in a drift tube. The electron bunch has cylindrical symmetry with the -axis oriented in the direction of motion. The charge density distribution is constant in the radial and Gaussian in the longitudinal direction, respectively. The electron bunch experiences both a radial pinch in the middle of the pulse, corresponding to the peak electron density, and a significant growth of the correlated emittance. This behavior is explained, and an approximate scaling law is identified. Comparisons of the results from the pic and PARMELA codes are presented.
Keywords
Cite
@article{arxiv.physics/9708013,
title = {Self-pinching of a relativistic electron bunch in a drift tube},
author = {Claudio G. Parazzoli and Benjamin E. C. Koltenbah},
journal= {arXiv preprint arXiv:physics/9708013},
year = {2008}
}
Comments
Latex2e format; requires elsart and epsfig packages; 16 PS pages; 14 embedded figures from 16 EPS files