| Paper | Title | Page |
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| MOPPH072 | Ultra High Brightness Accelerator Design | 214 |
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The Low Emittance Gun (LEG) Project at the Paul Scherrer Institute (PSI) in Switzerland incorporates the development of an ultra low emittance electron-source to drive a cost-effective X-ray FEL*. For this purpose the source is based on field-emitter technology followed by high gradient (1 MV, 0.25 GV/m) acceleration. However, even with such a design the emerging electron beam is fragile and it is not evident that the low emittance can be preserved in the following acceleration process. Here we present a concept to achieve this goal, i.e., the status of the electron source development and an overview of the acceleration concept. Emphasis is given to a 250 MeV accelerator design, which is suited to serve as an injector for an X-ray FEL at 0.1 nm (12.4 keV) and boosts the electron beam into a regime where space-charge forces become less dominant.
* K. Li et al., Proceedings of the FEL2005 Conference, Stanford, CA, USA, p. 483 (2005) |