First experimental data on the FEL - RF interaction at the Jefferson Lab IRFEL
High power FELs driven by recirculating, energy-recovering linacs can exhibit instabilities in the beam energy and laser output power. Fluctuations in the accelerating cavity fields can cause beam loss on apertures, phase oscillations and optical cavity detuning. These can affect the laser power and in turn the beam-induced voltage to further enhance the fluctuations of the rf fields. A theoretical model was developed to study the dynamics of the coupled system and was presented last year. Recently, a first set of experimental data was obtained at the Jefferson Lab IRFEL for direct comparisons with the model. The authors describe the experiment, present the data together with the modeling predictions and outline future directions.
- 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:
- 755079
- Report Number(s):
- DOE/ER/40150-1424; JLAB-ACP-99-04; TRN: US0002331
- Resource Relation:
- Conference: FEL Conference, Hamburg (DE), 08/23/1999--08/28/1999; Other Information: PBD: 1 Aug 1999
- Country of Publication:
- United States
- Language:
- English
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