Jefferson Lab IR FEL cryomodule modifications and test results

Conference · Sun Jun 01 04:00:00 EDT 1997

OSTI ID:489631

Wiseman, M; Benesch, J; Drury, M; Fisher, J ^[1]

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1. Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); and others

The Infrared Free Electron Laser being constructed at the Thomas Jefferson National Accelerator Facility will require a 42 MeV, 5 mA electron accelerator. The accelerator design requires a 10 MeV injector and a two pass 32 MeV linac, one pass for acceleration and one pass for energy recovery. In order to minimize the cost of the linac, standard CEBAF 1497 MHZ Superconducting Radio Frequency cavities and cryomodules are being used with minimal changes. Two SRF cavities, housed in a quarter cryomodule, operate at a nominal 10 MV/m to provide the injector energy. The linac is composed of one cryomodule, housing eight SRF cavities operating at an average gradient of 8 MV/m. The modifications to the cryomodule are being made to handle the higher beam current, to improve RF control, and to increase machine reliability. The modifications to the higher order mode (HOM) loads, cavity tuners, cavity beam line, warm and cold RF windows, and cryogenic shield are described. Test results from the injector quarter cryomodule are also presented.

• Research Organization: Southeastern Universities Research Association, Inc., Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 489631
• Report Number(s): DOE/ER/40150--1138; JLAB-ACT--97-03; CONF-970503--27; ON: DE97006518
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CRYOGENICS
FREE ELECTRON LASERS
LINEAR ACCELERATORS
MODIFICATIONS
RF SYSTEMS
SUPERCONDUCTING CAVITY RESONATORS
TESTING
THERMAL SHIELDS
WAVEGUIDES