Particle accelerator

According to the Thirteenth Doctor, a particle accelerator was used to generate anti-matter by smashing atoms together to produce positrons, which were then stored inside electric and magnetic fields. (TV: The Tsuranga Conundrum)

Cytronic particle accelerators were a type of power source created by the Osirans in the shape of small pyramids. These were used to power their service robots. (TV: Pyramids of Mars)

The Fourth Doctor once stated that he would "never be cruel to an electron in a particle accelerator again". (TV: The Pirate Planet)

A particle accelerator was among the "toys" which asked the Twelfth Doctor for in exchange for her assistance against the Monk invasion. (TV: The Lie of the Land)

In the early 1970s, Teri Billington of the Department of Applied Mathematics and Theoretical Physics at the University of Cambridge undertook an unofficial project in time dilation with the assistance of Liz Shaw. She designed and built a particle accelerator which Liz later disassembled to keep it from being used by the Sentinels of the New Dawn. Billington was unable to raise the funds to build a new one. (AUDIO: The Sentinels of the New Dawn)

Yasmin Khan stated that CERN had a massive particle accelerator. In the 67th century, the Tsuranga was equipped with an anti-matter drive, which was powered by a particle accelerator. (TV: The Tsuranga Conundrum)