it would require being able to generate a high enough energy beam But using current accelerator technology it would require an accelerator many times the size

it would require being able to generate a high enough energy beam But using current accelerator technology it would require an accelerator many times the size of the earth, _many_. I use to work at a particle accelerator, part time, when i was in college. Fun fact i once confirmed Einsteins photoelectric effect using a high energy x-ray beam, a copper target, and high voltage.