  This article is an extended version of the talk is given at the IPAC19
(Melbourne, Australia, May 2019) on the occasion of acceptance of the
ACFA/IPAC19 Nishikawa Tetsuji Prize for a recent, significant, original
contribution to the accelerator field, with no age limit with citation "...for
original work on electron lenses in synchrotron colliders, outstanding
contribution to the construction and operation of high-energy, high-luminosity
hadron colliders and for tireless leadership in the accelerator community."
