Raparia, D.

Paper	Title	Page
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
WEPC153	Dipole Magnet for Use of RHIC EBIS HEBT Line	2365
	T. Kanesue Kyushu University, Department of Applied Quantum Physics and Nuclear Engineering, Fukuoka M. Okamura, D. Raparia, J. Ritter BNL, Upton, Long Island, New York
	We present the design optimization of a dipole magnet for use of RHIC EBIS HEBT line. This magnet provides a total bending angle of 145 degrees by two identical magnets and it is used to guide H+ to Au32+ beam with energy of 2 MeV/amu. Magnetic field is required to change within 1 second corresponding to the ion species, so magnet body has the laminated structure to suppress eddy current. Effective length and field quality within a radius of 5 cm was optimized separately. Effective length was optimized by adjusting end shape not to change the beam orbit between low and high field operation more than 1 mm from intended beam orbit after bending. Then field quality was optimized by changing the shim position and additional bump. After modification, all multipole coefficients along the beam trajectory were reduced to within 10x10-4.