UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-22 1:55
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Conference: Bucharest University Faculty of Physics 2006 Meeting


Section: Solid State Physics and Materials Science


Title:
On a current skeleton undulator of two tangent circles


Authors:
Madalina Negoita(1), Minola Leonovici(1), V. I. R. Niculescu (2)


Affiliation:
(1)Faculty of Physics, Bucharest University, Bucharest

(2)INFLPR, Bucharest-Magurele


E-mail
maladinaa@yahoo.com


Keywords:
Magnetic field, undulator


Abstract:
A new undulator structure for free electron lasers was presented. Current skeleton of two tangent circles produces magnetic fields which are spatially periodic. The current structure was a modified stack of two tangent circles. The current has alternating directions. The magnetic field components for each wire present a C2 symmetry. The two tangent circles undulator transverse cross-section (in arbitrary units)are approximated by polygons. The angle alpha describes the undulator neck. In cartesian coordinates the Biot-Savart law was analytically evaluated. The magnetic field was mainly longitudinal and easily adjusted with the current. The versatility of this structure introduces a new type of two beams longitudinal undulator or wiggler design for transverse momenta.