V. I. R. Niculescu, L. Sandru, M. R. Leonovici, S. Miclos, V. Babin, A. Voinescu, Current two beams piecewise undulator, Opoelectron. Adv. Mater. – Rapid Communications, 3/4  (2009) 390-391

Title: Current two beams piecewise undulator

Abstract: A new undulator structure for free electron lasers was presented. Current PIECEWISE devices produce magnetic fields which are spatially periodic. The current has alternating directions in wires stacks. The Biot - Savart law was analytically evaluated. The structure versatility cover longitudinal undulator or wiggler design for one or two beams devices with transverse momenta.

Key words: Free electron laser, Electromagnetic undulator