Performance of the accelerator driver of Jefferson Laboratory's free-electron laser

Conference · Thu Apr 01 04:00:00 EST 1999

DOI:https://doi.org/10.1109/PAC.1999.792721· OSTI ID:754418

Bohn, C L; Benson, S; Biallas, G ^[1]

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1. and others

The driver of Jefferson Lab's kW-level infrared free-electron laser (FEL) is a superconducting, recirculating accelerator that recovers about 75% of the electron-beam power and converts it to radiofrequency power. In achieving first lasing, the accelerator operated straight-ahead to deliver 38 MeV, 1.1 mA cw current through the wiggler for lasing at wavelengths in the vicinity of 5 {mu}m. Just prior to first lasing, measured rms beam properties at the wiggler were 7.5{+-}1.5 mm-mr normalized transverse emittance, 26{+-}7 keV-deg longitudinal emittance, and 0.4{+-}0.1 ps bunch length which yielded a peak current of 60{+-}15A. The waste beam was then sent directly to a dump, bypassing the recirculation loop. Stable operation at up to 311 W cw was achieved in this mode. Commissioning the recirculation loop then proceeded. As of this Conference, the machine has recirculated cw average current up to 4 mA, and has lased cw with energy recover up to 710 W.

• 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: 754418
• Report Number(s): DOE/ER/40150-1364; JLAB-ACC-99-03
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
43 PARTICLE ACCELERATORS
CEBAF ACCELERATOR
ENERGY RECOVERY
FEL
FREE ELECTRON LASERS
LINEAR ACCELERATORS
MILLI AMP BEAM CURRENTS
OPERATION
PERFORMANCE
SUPERCONDUCTING DEVICES