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Zelenski, A.

Paper Title Page
MOPC108 AGS Polarized Proton Operation in Run 8 316
 
  • H. Huang, L. Ahrens, M. Bai, K. A. Brown, C. J. Gardner, J. W. Glenn, F. Lin, A. U. Luccio, W. W. MacKay, T. Roser, S. Tepikian, N. Tsoupas, K. Yip, A. Zelenski, K. Zeno
    BNL, Upton, Long Island, New York
  • H. M. Spinka, D. G. Underwood
    ANL, Argonne, Illinois
 
  A dual partial snake scheme has been used for AGS polarized proton operation for several years. It has provided polarized proton beams with 1.5*1011 protons per bunch and 65% polarization for the RHIC spin program. There is still residual polarization loss due to both snake resonances and horizontal resonances. Several schemes were tested in the AGS to mitigate the loss. This paper presents the experiment results and analysis.  
TUOBM03 High-Intensity Polarized H- (Proton), Deuteron and 3He++ Ion Source Development at BNL 1010
 
  • A. Zelenski, J. G. Alessi, A. Kponou, D. Raparia
    BNL, Upton, Long Island, New York
 
  New techniques for production of polarized H- (protons), deuteron and 3He++ ion beams (based on optical pumping polarization method) will be discussed. Feasibility studies of these techniques are in progress at BNL. The depolarization factors in the multi-step spin-transfer polarization technique and basic limitations on maximum polarization in the OPPIS (Optically-Pumped Polarized H- Ion Source) will be discussed. Detailed studies of polarization losses in the RHIC OPPIS and the source parameters optimization resulted in the OPPIS polarization increase to 86-90%. This contributed to AGS and RHIC polarization increase to 65-70%.  
slides icon Slides  
TUPC039 p-Carbon CNI Polarimetry in the AGS and RHIC 1140
 
  • H. Huang, A. Bazilevsky, A. Bravar, G. Bunce, V. Dharmawardane, R. L. Gill, Y. Makdisi, B. Morozov, M. Sivertz, D. Steski, K. Yip, A. Zelenski
    BNL, Upton, Long Island, New York
  • I. G. Alekseev, D. Svirida
    ITEP, Moscow
  • W. Lozowski
    IUCF, Bloomington, Indiana
 
  Polarimetry based on proton carbon elastic scattering in the Coulomb Nuclear Interference (CNI) region has been utilized for Relativistic Heavy Ion Collider (RHIC). They have been critical tools for polarized proton acceleration setup and provided polarization values for RHIC experiments. This paper summarizes the recent modifications to the hardware and electronics. The performance of the polarimeters is also discussed.  
WEPP019 RHIC Polarized Proton Performance in Run-8 2566
 
  • C. Montag, N. P. Abreu, L. Ahrens, M. Bai, D. S. Barton, A. Bazilevsky, J. Beebe-Wang, M. Blaskiewicz, J. M. Brennan, K. A. Brown, D. Bruno, G. Bunce, R. Calaga, P. Cameron, R. Connolly, T. D'Ottavio, K. A. Drees, A. V. Fedotov, W. Fischer, G. Ganetis, C. J. Gardner, J. W. Glenn, T. Hayes, H. Huang, P. F. Ingrassia, A. Kayran, J. Kewisch, R. C. Lee, V. Litvinenko, A. U. Luccio, Y. Luo, W. W. MacKay, Y. Makdisi, N. Malitsky, G. J. Marr, A. Marusic, R. J. Michnoff, J. Morris, B. Oerter, H. Okada, F. C. Pilat, P. H. Pile, G. Robert-Demolaize, T. Roser, T. Russo, T. Satogata, C. Schultheiss, M. Sivertz, K. Smith, S. Tepikian, D. Trbojevic, N. Tsoupas, J. E. Tuozzolo, A. Zaltsman, A. Zelenski, K. Zeno, S. Y. Zhang
    BNL, Upton, Long Island, New York
 
  During Run-8, the Relativistic Heavy Ion Collider (RHIC) provided collisions of spin-polarized proton beams at two interaction regions. Helical spin rotators at these two interaction regions were used to control the spin orientation of both beams at the collision points. Physics data were taken with different orientations of the beam polarization. We present recent developments and improvements as well as the luminosity and polarization performance achieved during Run-8.