In physics, particle accelerators are devices for generating streams of sub-atomic particles at very high energies. The field concerned with designing and building particle accelerators is called accelerator physics.

Small particle accelerators are used in a variety of industrial applications, including radiation therapy. Large particle accelerators are installed at particle collider laboratories.

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Note to contributors

• This category is for particle accelerators.
• For accelerators with common purposes, use the categories Category:Particle physics facilities and Category:Synchrotron radiation facilities.
• For the physics of particle acceleration, related concepts and technologies, use Category:Accelerator physics.
• For articles about specific particle detectors and associated experiments, use Category:Particle experiments.