• K.A. Brown, L. A. Ahrens, C.J. Gardner, D.M. Gassner, D. Raparia, D. Steski, P. Thieberger, K. Zeno
  BNL, Upton, Long Island, New York

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.

As part of the efforts to increase polarization and luminosity in RHIC during polarized proton operations we have modified the injection optics and stripping foil geometry in the AGS Booster in order to reduce the emittance growth during H^- injection. In this paper we describe the modifications, the injection process, and present results from beam experiments.

• A. Zelenski, G. Atoian, A. Bazilevsky, G. Bunce, R. Connolly, D.M. Gassner, R.L. Gill, H. Huang, G.J. Mahler, Y. Makdisi, B. Morozov, S. Nemesure, T. Russo, M. Sivertz, D. Steski, S. Tepikian, R.J. Todd, K. Yip
  BNL, Upton, Long Island, New York

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.

The proton polarization measurements in AGS and RHIC are based on proton-carbon and proton-proton elastic scattering in the Coulomb Nuclear Interference region. Polarimeter operation in the scanning mode gives polarization profiles and beam intensity profile measurements. This polarimeter is an ideal wire-scanner due to: extremely good signal/noise ratio and high counting rate, which allows accurate bunch by bunch emittance measurements during 100 ms time of the beam crossing. The measurements of the beam emittance in both vertical and horizontal planes will be possible after polarimeter upgrade for the 2009 polarized run. Two new vacuum chambers and two target motion mechanisms and detectors assembly will be installed in each ring. One polarimeter can be used for the vertical polarization and intensity profile measurements and the second can be used for the horizontal profile measurements. The absolute accuracy limitations and cross-calibration of different techniques will be also discussed.