Abstract
The possibility of building free-electron lasers and masers with quasi-circular undulators is considered. The two-mirror cavity is replaced by a suitable waveguide. The magnetic field along the orbit has a continuous component superimposed on the alternating one. Besides allowing large freedom for electron guiding and focusing, the structure allows effective negative mass conditions, which may enhance the electron beam modulation when space charge effect are important. Furthermore the radiation frequency can be higher than that in a linear undulator with the same electron energy, and long interaction times are possible in a compact structure.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D.A.G. Deacon, L.R. Elias, J.M.J. Madey, G.J. Ramian, H.A. Schwettmann, T.I. Smith Phys. Rev. Lett.38, 892 (1977)
J.M.J. Madey, H.A. Schwettmann, W.M. Fairbank: IEEE Trans. NS-20, 980 (1973)
G. Brautti, V. Stagno: Nucl. Instrum. Meth.135, 393 (1976)
H. Bruck: Accélérateurs circulares de particules, Institut National des Sciences et Technologie Nuclaires (Saclay 1966)
J.J. Livingood:Principles of Cyclic Particle Accelerators (D. Van Nostrand, New York 1961)
G. Brautti, T. Clauser, A. Rainò, V. Stagno: Nucl. Instrum. Meth.153, 357 (1978)
W.B. Colson: Phys. Lett.59A, 187 (1976)
J.D. Jackson:Classical Electrodynamics, 2nd ed. (John Wiley, London 1962)
G. Brautti, T. Clauser, A. Rainò, V. Stagno Alta Frequenza46, 354 (1977)
F.A. Hopf, P. Meystre, M.O. Scully, W.H. Louisell: Opt. Commun.18, 413 (1976)
Author information
Authors and Affiliations
Additional information
Work partially supported by the CNR (Consiglio Nazionale delle Ricerche, Italy), contract n. 78.00915.02 and n.78.00916.02.