Simulations of the TJNAF FEL with tapered and inversely tapered undulators

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Authors
Christodoulou, A.
Lampiris, D.
Colson, W.B.
Crooker, P.P.
Blau, J.
McGinnis, R.D.
Benson, S.V.
Gubeli, J.F.
Neil, G.R.
Subjects
Taper
Inverse taper
Free-electron laser
Simulation
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Date of Issue
2001
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Abstract
Experiments using the TJNAF FEL have explored the operation with both tapered and inversely tapered undulators. We present here numerical simulations using the TJNAF experimental parameters, including the effects of taper. Singlemode simulations show the effect of taper on gain. Multimode simulations describe the evolution of short optical pulses in the far infrared, and show how taper affects single-pass gain and steady-state power as a function of desynchronism. A short optical pulse presents an ever-changing field strength to each section of the electron pulse so that idealized operation is not possible. Yet, advantages for the recirculation of the electron beam can be explored.
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Article
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https://hdl.handle.net/10945/44079
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Physics
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Funder
The authors are grateful for support by the Naval Postgraduate School.
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Citation
Nuclear Instruments and Methods in Physics Research A, Volume 475, (2001), pp. 182â 186
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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