Simulations of the 100 kW TJNAF FEL Using a Step-Tapered Undulator

Journal Article · Wed May 01 04:00:00 EDT 2002 · Nuclear Instruments and Methods in Physics Research A, Vol. 483 (1-2) (2002) pp. 138-141

OSTI ID:794941

Blau, J; Bouras, V; Colson, W B; Kalfoutzos, A; Benson, S V; Dylla, H F; Neil, G R

The TJNAF free electron laser (FEL) can be upgraded to operate at 100 kW average power in the near future using a configuration that recirculates the electron beam to recover energy. It is important to extract the maximum energy from the electron beam in a pass through the undulator while inducing the minimum amount of exhaust energy spread. A larger energy extraction reduces the requirement for a large recirculating current, while a smaller exhaust energy spread allows the intense electron beam to be recirculated without damaging components. To improve FEL performance, we explore the use of the step-tapered undulator which alters the resonance condition halfway through the undulator. Short pulses and optical diffraction complicate the desired interaction. Comparisons are made to the conventional periodic and linearly tapered undulators.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 794941
• Report Number(s): JLAB-ACT-01-26; DOE/ER/40150-2077
• Journal Information: Nuclear Instruments and Methods in Physics Research A, Vol. 483 (1-2) (2002) pp. 138-141, Journal Name: Nuclear Instruments and Methods in Physics Research A, Vol. 483 (1-2) (2002) pp. 138-141
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CONFIGURATION
DIFFRACTION
ELECTRON BEAMS
FREE ELECTRON LASERS
PERFORMANCE
RESONANCE
WIGGLER MAGNETS