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TY - CONF AU - Huang, H. AU - Ahrens, L. AU - Bai, M. AU - Blaskiewicz, M. AU - Brown, K.A. AU - Connolly, R. AU - Dutheil, Y. AU - Fischer, W. AU - Gardner, C.J. AU - Glenn, J.W. AU - Hayes, T. AU - Méot, F. AU - Poblaguev, A. AU - Ranjbar, V.H. AU - Roser, T. AU - Schoefer, V. AU - Smith, K.S. AU - Tepikian, S. AU - Tsoupas, N. AU - Yip, K. AU - Zelenski, A. AU - Zeno, K. AU - Zhang, S.Y. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Overcoming the Horizontal Depolarizing Resonance in the Brookhaven AGS J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Imperfection and vertical intrinsic depolarizing resonances have been overcome by the two partial Siberian snakes in the 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. Fast roll-over magnet cycle has been used and it improves the polarization transmission efficiency near extraction when acceleration usually is slowing down. Emittance preservation is also important to mitigate polarization loss. Recent experimental results including jump quad timing and emittance preservation are presented in this paper. PB - JACoW CP - Geneva, Switzerland SP - 2112 EP - 2114 KW - resonance KW - polarization KW - emittance KW - timing KW - betatron DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-WEPRO070 UR - http://jacow.org/ipac2014/papers/wepro070.pdf ER -