Particle Accelerator, Invented by E. O. Lawrence

Puzzle 8 of Famous Philosophers Hard Pack

Question is: Particle Accelerator, Invented by E. O. Lawrence

and the answer is: CYCLOTRON

Word Meaning:

CYCLOTRON — An early particle accelerator in which charged particles were generated at a central source and accelerated spirally outward through a fixed magnetic field and alternating electric fields.

Definitions from Wiktionary.