Simulations of the TJNAF FEL with tapered and inversely tapered undulators

Journal Article · Sat Dec 01 00:00:00 EST 2001 · Nuclear Instruments and Methods in Physics Research Section A

DOI:https://doi.org/10.1016/S0168-9002(01)01561-3· OSTI ID:804106

Christodoulou, A; Lampiris, D; Colson, W B; Crooker, P P; Blau, J; McGinnis, R D; Benson, Steve; Gubeli, Joseph; Neil, George

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. Single-mode 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.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 804106
• Report Number(s): JLAB-ACC-01-34; DOE/ER/40150-2323; TRN: US0300617
• Journal Information: Nuclear Instruments and Methods in Physics Research Section A, Vol. 475, Issue 1-3; Other Information: 22nd International FEL Conference and 7th FEL Users Workshop, 13-18 Aug 2000, Durham, NC; PBD: 1 Dec 2001
• Country of Publication: United States
• Language: English

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