High density polarized hydrogen gas target for storage rings
- Max-Planck-Institut fuer Kernphysik, 69029 Heidelberg (Germany)
- Philipps-Universitaet, Fachbereich Physik, 35032 Marburg (Germany)
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
A target of gaseous polarized hydrogen was formed by injecting polarized hydrogen atoms (produced by Stern--Gerlach spin separation) into a storage cell consisting of a cylindrical tube open at both ends. The target was placed in a storage ring to study the target characteristics (nuclear polarization, target thickness, radiation resistance). A weak transverse guide field (5 G) was applied to define the polarization direction. When atoms in a single hyperfine state were selected, the nuclear polarization of the target was measured to be 0.80{plus_minus}0.02. The areal density of the target under these conditions was (5.5{plus_minus}0.2){times}10{sup 13} {bold H}/cm{sup 2}, while for two spin states (applicable to experiments in high energy rings where a strong magnetic field can be applied to the target) the target thickness was found to be (8.2{plus_minus}0.3){times}10{sup 13} {bold H}/cm{sup 2}. The target polarization was unaffected by prolonged exposure of the target to beams up to 1 mA. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- OSTI ID:
- 164987
- Journal Information:
- Review of Scientific Instruments, Vol. 66, Issue 1; Other Information: PBD: Jan 1995
- Country of Publication:
- United States
- Language:
- English
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