These proceedings comprise cutting-edge contributions by researchers at the frontiers of beam physics, free-electron-based light sources, and advanced accelerators. It represents a snap-shot of activity in these fields at a critical historical juncture, where rapid experimental progress is being reported, and new facilities such as X-ray free-electron lasers are under construction. The volume features invited contributions from leading researchers from the international beam physics community that summarize the state-of-the-art research in individual topics, as well as timely contributions from participants that arose during the workshop itself.Contents:Wakefields of Sub-Picosecond Electron Bunches (K L F Bane)Needle Cathodes for High-Brightness Beams (C H Boulware et al.)Ultracold Electron Sources (O J Luiten et al.)Mitigation of RF Gun Breakdown by Removal of Tuning Rods in High Field Regions (A M Cook et al.)Superconducting Photocathodes (J Smedley et al.)Experimental Testing of Dynamically Optimized Photoelectron Beams (J B Rosenzweig et al.)Synchronization Between the Laser and Electron Beam in a Photocathode RF Gun (A Sakumi et al.)Simulations of Coherent Synchrotron Radiation Effects in Electron Machines (M Migliorati et al.)Channeling Projects at LNF: From Crystal Undulators to Capillary Waveguides (S B Dabagov et al.)Coupling Laser Power into a Slab-Symmetric Accelerator Structure (R B Yoder & J B Rosenzweig)and other papersReadership: Graduate students and professionals researchers in relativistic electron beams and their frontier applications. Also appropriate as a guide for new researchers or graduate students entering the field.