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relativistic positron beams

Laser and Particle Beams (1)

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Parametric exploration of intense positron beam–plasma interactions
B.E. BLUE, C.E. CLAYTON, C.L. O'CONNELL, F.-J. DECKER, M.J. HOGAN, C. HUANG, R. IVERSON, C. JOSHI, T.C. KATSOULEAS, K.A. MARSH, W.B. MORI, D. WALZ
Journal:

Laser and Particle Beams / Volume 21 / Issue 4 / October 2003

Published online by Cambridge University Press:

25 March 2004, pp. 497-504
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A systematic investigation of the longitudinal fields excited in a plasma by a short, dense beam of positrons is carried out using two-dimensional, cylindrical geometry, particle-in-cell code simulations. In particular, we examine the behavior of the accelerating and decelerating fields of the wakefield as a function of beam charge, radius, length, and plasma density. The parameters are chosen to be consistent with those employed in current and future experiments designed to elucidate the physics of positron beam–plasma interactions.