  The study of charge-exchange injection of protons into accelerators started
in 1960 at the Institute of Nuclear Physics of the Siberian Branch of Russian
Academy of Science, as proposed by G. I. Budker in connection with the
development of the program of the VAPP-4 proton-antiproton collider. Since the
purpose was the accumulation of beams with a maximum intensity, and the record
intensity of the H- ion beams received by that time was only 70 {\mu}A, an
important part of the program was the development of methods to produce intense
beams of negative hydrogen ions. Charge-exchange injection of particles into
accelerators and storage rings is an important application of the
charge-exchange technology. Development of charge exchange injection with
compensation of ionization energy loss by RF acceleration voltage up to the
space charge limit is presented. Accumulation of coasting beam with space
charge compensation with weak focusing and strong focusing is described.
Accumulation of circulating beam in a storage ring with intensity above space
charge limit is presented. Observation, explanation and damping of e-p
instability (electron cloud effect) is discussed. Recent developments of charge
exchange injection are discussed. Laser ionization of H- in charge exchange
injection is reviewed.
