The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - UNPB AU - Luiten, O.J. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Ultrafast Electron Diffraction - Present Status and Future Advances J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - In this review I will first discuss beam requirements for ultrafast electron diffraction, in particular the biggest challenge: what is needed for recording diffraction patterns of complex macromolecular crystals in a single, femtosecond shot. Subsequently I will discuss the present state of the art provided by bright photoemission guns, both non-relativistic DC guns and relativistic RF guns, in combination with RF bunch compression. Finally I will go into several more exotic methods that are being developed to achieve an even higher degree of spatial coherence and temporal resolution: sources based on laser plasma acceleration and ultracold sources based on photoionization of laser-cooled gases or on cryo-cooled semiconductors photocathodes. PB - JACoW CP - Geneva, Switzerland ER -