A high energy linear accelerator (LINAC) is an RF powered system inside a radiotherapy machine (RT) that generates ionizing radiation for treatments to kill cancerous cells in oncology treatment centers for radiation therapy (See Figure A & B below). Medical linear accelerators can produce both high energy electron beams or X-Rays (photon beams), range in power from 4 to 25 MeV, can be configured vertically for lower energies, and horizontally for high energy systems that require a beam transport system.