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Relativistic Heavy Ion Collider An accelerator in which two
beams of ions or polarized protons are brought into collision,
in as many as six locations, in order to study the state of
matter formed in the first microseconds of the Universe and to
study the spin structure of the proton. Alternating Gradient
Synchrotron The AGS is the final stage of the accelerator
injector chain which accepts beam from the Booster and then
accelerates ions and polarized protons to the minimum RHIC
energy. The AGS then injects the beam into the two accelerator
rings that comprise RHIC. The Booster accepts ions from the
Tandem Van de Graaffs and protons from the LINAC, which then
accelerates the beam to the minimum AGS energy before injecting
the beam into the AGS. The Booster supplies beam to