RF coupler for high-power CW FEL photoinjector

Conference · Wed Jan 01 04:00:00 EST 2003

DOI:https://doi.org/10.1109/PAC.2003.1289966· OSTI ID:976647

Kurennoy, S ^[1]; Young, L M ^[2]

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1. Sergey
2. Lloyd M.

A high-current emittance-compensated RF photoinjector is a key enabling technology for a high-power CW FEL. The design presently under way is a 100-mA 2.5-cell {pi}-mode, 700-MHz, normal conducting demonstration CW RF photoinjector. This photoinjector will be capable of accelerating 3 nC per bunch with an emittance at the wiggler less than 10 mm-mrad. The paper presents results for the RF coupling from ridged wave guides to hte photoinjector RF cavity. The LEDA and SNS couplers inspired this 'dog-bone' design. Electromagnetic modeling of the coupler-cavity system has been performed using both 2-D and 3-D frequency-domain calculations, and a novel time-domain approach with MicroWave Studio. These simulations were used to adjust the coupling coefficient and calculate the power-loss distribution on the coupling slot. The cooling of this slot is a rather challenging thermal management project.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 976647
• Report Number(s): LA-UR-03-3084
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
DESIGN
DISTRIBUTION
FREE ELECTRON LASERS
MANAGEMENT
RF SYSTEMS
SIMULATION