Which type of radiation is NOT a concern when working with acceleration beams?

Alpha particles are not typically a concern when working with acceleration beams such as those produced in linear accelerators or synchrotrons. This is because alpha particles are relatively heavy and positively charged, which means they have low penetrating power. They can be easily stopped by a sheet of paper or even the outer layer of human skin. In the context of radiation safety in facilities that utilize acceleration beams, the primary focus is on radiation types that possess greater penetration capabilities, such as beta particles, gamma rays, and X-rays, all of which can pose significant health risks if appropriate shielding and safety measures are not implemented.

Alpha radiation, on the other hand, is more of a concern in situations where radioactive materials are ingested or inhaled, as their harmful effects would occur inside the body rather than through external exposure. Therefore, in environments where beams of accelerated particles are used, the threat from alpha radiation is minimal compared to the other forms.