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Related to proton accelerator: Proton beam
proton accelerator[′prō‚tän ak′sel·ə‚rād·ər]
A particle accelerator which accelerates protons to high energies, as opposed to one which accelerates heavier ions or electrons.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.