1. Transport of a space-charge dominated electron beam in a short-quadrupole channel
- Author
-
T.F. Godlove, Yuelin Li, R. A. Kishek, Irving Haber, Santiago Bernal, P. Chin, Martin Reiser, and J.G. Wang
- Subjects
Physics ,Nuclear and High Energy Physics ,Physics and Astronomy (miscellaneous) ,Solenoid ,Surfaces and Interfaces ,Electron ,Space charge ,Section (fiber bundle) ,Quadrupole ,Cathode ray ,Physics::Accelerator Physics ,lcsh:QC770-798 ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,Atomic physics ,Beam (structure) ,Envelope (waves) - Abstract
Results are presented for electron beam transport experiments in a 1-m-long straight section consisting of a solenoid and five short printed-circuit quadrupoles. A linear computer code for rms envelope matching, SPOT, is used for channel design, while final simulations with more realistic elements are obtained with a $2\frac{1}{2}\mathrm{D}$ version of WARP, a particle-in-cell code. Reasonable agreement is found between calculations and the effective beam envelope obtained from pictures of the beam on a movable phosphor screen. The results validate, within experimental errors, the use of short magnetic quadrupoles for the transport of space-charge dominated beams. The straight section constitutes the prototype matching section for an electron recirculator to be built at the University of Maryland.
- Published
- 1998