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  • Open Access

Transport of a space-charge dominated electron beam in a short-quadrupole channel

S. Bernal, P. Chin, R. A. Kishek, Y. Li, M. Reiser, and J. G. Wang

T. Godlove

I. Haber

  • Institute for Plasma Research, University of Maryland, College Park, Maryland 20742

  • FM Technologies, Inc., Fairfax, Virginia 22032

  • Naval Research Laboratory, Washington, D.C. 20375

Phys. Rev. ST Accel. Beams 1, 044202 – Published 31 August, 1998

DOI: https://doi.org/10.1103/PhysRevSTAB.1.044202

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 212D 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.

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