Concepts for the JLab Ampere-Class CW Cryomodule

Conference · Sun May 01 04:00:00 EDT 2005

OSTI ID:840062

Rimmer, R; Daly, E F; Hicks, W R; Henry, J; Preble, J; Stirbet, M; Wang, H; Wilson, K M; Wu, G

We describe the concepts and developments underway at JLab as part of the program to develop a new CW cryomodule capable of transporting ampere-level beam currents in a compact FEL. Requirements include real-estate gradient of at least 10 MV/m and very strong HOM damping to push BBU thresholds up by two or more orders of magnitude compared to existing designs. Cavity shape, HOM damping, power couplers, tuners etc. are being designed and optimized for this application. Cavity considerations include a large iris for beam halo, low-RF losses, HOM frequencies and Q's, low peak surface fields, field flatness and microphonics. Module considerations include high packing factor, low static heat leak, image current heating of beam-line components, cost and maintainability. This module is being developed for the next generation ERL based high power FELs but may be useful for other applications such as electron cooling, electron-ion colliders, industrial processing etc.

• 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: 840062
• Report Number(s): JLAB-ACC-05-354; DOE/ER/40150-3378
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM CURRENTS
CEBAF ACCELERATOR
CRYOGENICS
DESIGN
FREE ELECTRON LASERS
HEATING