  Experimental results and simulation models show that crystals might play a
relevant role for the development of new generations of high-energy and
high-intensity particle accelerators and might disclose innovative
possibilities at existing ones. In this paper we describe the most advanced
manufacturing techniques of crystals suitable for operations at ultra-high
energy and ultra-high intensity particle accelerators, reporting as an example
of potential applications the collimation of the particle beams circulating in
the Large Hadron Collider at CERN, which will be upgraded through the addition
of bent crystals in the frame of the High Luminosity Large Hadron Collider
project.
