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Title: $OVERCOMING THE HORIZONTAL DEPOLARIZING RESONANCE IN THE BROOKHAVEN AGS
Abstract: Imperfection and vertical intrinsic depolarizing resonances have been overcome by the two partial Siberian snakes in the Alternative Gradient Synchrotron(AGS). The relatively weak but numerous horizontal resonances are the main source of polarization loss in the AGS. A pair of horizontal quads have been used to overcome these weak resonances. This technique needs very accurate jump timing. The keys for the system are the accurate control of the jump quad timing and the elimination of any emittance growth. Fast rollover magnet cycle has been used and it improves the horizontal tune jump quads setup. Recent experimental results including jump quad timing and emittance preservation are presented in this paper.