Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment vol:556 issue:1 pages:1-12
A study to determine the optimum magnet system for a polarized atomic hydrogen jet target is described. The design uses an atomic beam source with Ne-Fe-B permanent sextupole magnets to focus the beam and high frequency hyperfine transitions to produce nuclear polarization. A simulation model was developed and a new optimization technique was applied to the model. The study resulted in a magnet system predicted to generate an intensity of 9 X 10(16) atoms/s and a record polarized jet-target thickness of 9.5 x 10(11) atoms/cm(2). The source design was subsequently used for construction of the RHIC polarized hydrogen jet target. The design of a polarimeter to determine the atomic polarization of the jet is also described. (c) 2005 Elsevier B.V. All rights reserved.