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In this paper we discuss the possibility to generate and accelerate protonnanobeams in fully dielectric laser-driven accelerators (p-DLAs). High gradienton-chip optical-power dielectric laser accelerators (DLAs) could represent oneof the most promising way towards future miniaturized particle accelerator. Aprimary challenge for DLAs are small beam apertures having a size of the orderof the driving laser wavelength where low charge high-repetition (or also CW)ultralow emittance nanobeams have to be transported. For electrons beamsgeneration and acceleration, intense research activities are ongoing, andseveral demonstrations have been already obtained by using electrons nanotip(or flat photocathode) sources feeding dielectric microstructures. In thisarticle we aim at the possibility to integrate a nanosource for the generationof a light ion or proton nano-beams suitable for the subsequent accelerationinto sub-relativistic (low-beta) p-DLA stages. Such integration includes theidea to use a proton dielectric radiofrequency quadrupole (p-DRFQ) for bridgingthe gap between the accelerator front-end and the drift-tube and high-betasections. The paper has been prepared as a white book including state-of-arttechnologies and new solutions that now put the ambitious frontier of a fullynanostructured proton accelerator into reach. Conceptual studies of p-DLAs herepresented could enable table-top proton nano-beams for several applications:proton beam writing, nuclear reaction analysis at sub-micrometer scales, theconstruction of miniaturized Proton-Boron Nuclear Fusion based Reactors,biological analysis at the micrometer scale, ion beam analysis at thesub-cellular level, mini-beams ion therapy to spare the shallow tissues, protonirradiation of transistors, compact proton linac for neutron generation.

Feasibility Study and Perspectives of proton Dielectric Laser Accelerators (p-DLA): from nanosource to accelerator scheme