ACCELERATION OF POLARIZED PROTONS TO 8. 5 GeV/c.

Polarized protons have been accelerated to 8. 5 GeV/c in the Zero Gradient Synchrotron (ZGS) at the Argonne National Laboratory and were successfully extracted and used for high energy physics experiments. The protons were initially polarized in a ground state atomic beam source at 20 keV, and then accelerated to 750 keV in a Cockcroft-Walton, and then to 50 MeV in a linac before injection into the ZGS. Pulsed quadrupoles in the ZGS were used to pass through several depolarizing resonances without significant depolarization. The protons were extracted either with an energy loss target or by resonance extraction.