ABSTRACT

We introduce the ALPA book and its subject matter, laser-driven particle acceleration, for applications. Milestone achievements in accelerator history and the uniqueness of laser contributions to accelerator advancement are briefly addressed with a few robust examples. Notable is the comparison of the laser–plasma source as a ‘laser–plasma photoinjector’ with the well-known electron RF photoinjector. The close coupling with state-of-the-art high-powered laser technology is also highlighted. The intrinsic generation of ultra-short particle bunches and a natural capacity for producing synchronous multiple beams can inspire new accelerator and accelerator source concepts. Even the typically large at-source energy spread and angular divergence of laser–plasma-driven particle bunches can pose accelerator challenges that also bring innovative opportunities. Such is the character of laser-driven sources which are explicitly distinguished from the more inclusive integrated laser-driven particle accelerator system concept (for example, the integrated laser-driven ion accelerator system, ILDIAS for ions). This introduction also outlines the rationale of the ALPA book and its key aims; most importantly, to inform and inspire various research and development communities about novel opportunities enabled by the uniqueness of laser-driven particle acceleration and its prospects. The reader is advised on how to approach this book which presents a diverse assortment of specialized application possibilities.