| | Encouraged by the successful operation of the JLab
Demo in 1998, many high current Energy Recovered
Light Sources (ERLs) are now being designed with not
only short pulse synchrotron beamlines but also FELs.
High power FELs have continued to make significant
progress in the last few years. Power advances are taking
advantage of the energy recovering linac technology on
both superconducting and room temperature machines. In
general, the limiting technology has been the injector
current capability but there are a number of other
technical factors which must be considered to
successfully develop a high average power Free Electron
Laser. With a number of groups poised to develop 100
mA ERLs, many with FELs, the importance of resolving
limiting issues is becoming more critical. The
Recuperator at Novosibirsk has the record current of 22
mA and has produced over 400 W of FEL power and
work is underway to extend the power and performance
of this pioneering machine. Meanwhile, at Jefferson Lab,
the Upgrade FEL achieved 14.3 kW of output while
recirculating 8 mA. This talk will review the status of
several high average power FELs around the world with
an emphasis on the srf technology. | |
