Cosmic rays are very high-energy charged particles, and are believed to be primarily remnants of the Big Bang. They move at nearly the speed of light and carry enough energy to smash molecules to pieces. We currently do not possess the technology to produce charged particle bursts with similar energy levels - it would take a particle accelerator the size of the Earth to do it. Even if we could, we probably wouldn't want to, except under very carefully controlled conditions. There would be no way to control the effects on biological systems, and the potential for doing more harm than good is clearly present. It would be like trying to adjust the contrast on your TV by firing cannonballs at the controls. Imagine the energy of a bullet concentrated into a space the size of a proton. That's a typical cosmic ray.