Energy recovered Linacs are being proposed for the next generation of synchrotron light sources because of the high brightness that is potentially available. The electron beams are accelerated in a superconducting linac, make a single pass around a transport line containing wigglers and undulators, and are decelerated in the same linac, returning their energy to the cavities. Achieving the full potential of such a light source requires high current, high brightness guns - 100 mA is desirable. In this talk, it is proposed to drift the electron beam through the linac so that it traverses the wigglers and undulators twice before being decelerated. This would halve the requirements on the gun for the same brightness.
Talk Slides: part 1, part 2
(Coffee & Cookies before the seminar starting 10:00 am)