Photoinjector RF cavity design for high power CW FEL

Conference · Tue Jan 01 04:00:00 EST 2002

DOI:https://doi.org/10.1109/PAC.2003.1289539· OSTI ID:976468

Kurennoy, S ^[1]; Schrage, D L ^[2]; L, Wood R ^[3]; Young, L M ^[4]; Schultheiss, T ^[5]; Christina, V; Rathke, J ^[6]

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1. Sergey
2. Dale L.
3. Richard L.
4. Lloyd M.
5. Thomas
6. John

The project is under way to develop a key enabling technology for high-power CW FEL: an RF photoinjector capable of producing continuous average current greater than 100 mA. The specific aim is a 700 MHz pi-mode, normal-conducting RF photoinjector, 3 nC of bunch charge, 100 mA of current (at 33.3-MHz bunch repetition rate) and emittance less than 10 mm-mrad. This level of performance will enable robust 100-kW-class FEL operation with electron beam energy 400 MeV, thereby reducing the size and cost of the FEL. This design is scalable to the MW power level by increasing the electron bunch repetition rate from 33.3 MHz to a higher value. The major challenges are emittance control and high heat flux within the CW 700-MHz RF cavities. Results of RF cavity design and cooling schemes are presented, including both high-velocity water and liquid nitrogen cooling options.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 976468
• Report Number(s): LA-UR-02-7412
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
CAVITIES
DESIGN
ELECTRON BEAMS
ELECTRONS
FREE ELECTRON LASERS
HEAT FLUX
NITROGEN
PERFORMANCE
WATER