The Polarized H and D Atomic Beam Source for ANKE at COSY-Jülich

Abstract

A polarized atomic beam source was developed for the polarized internal storage-cell gas target at the magnet spectrometer ANKE of COSY-Jülich. The intensities of the beams injected into the storage cell, measured with a compression tube, are $7.5\cdot 10^{16}$ hydrogen atoms/s (two hyperfine states) and $3.9\cdot 10^{16}$ deuterium atoms/s (three hyperfine states). For the hydrogen beam the achieved vector polarizations are $p_{\mathrm{z}}\approx \pm 0.92$. For the deuterium beam, the obtained combinations of vector and tensor ($p_{\mathrm{zz}}$) polarizations are $p_{\mathrm{z}}\approx \pm 0.90$ (with a constant $p_{\mathrm{zz}}\approx +0.86$), and $p_{\mathrm{zz}}=+0.90$ or $p_{\mathrm{zz}}=-1.71$ (both with vanishing $p_{\mathrm{z}}$). The paper includes a detailed technical description of the apparatus and of the investigations performed during the development.

18 pages, 26 figures, 4 tables

References in corpus (2)

• The neutron-proton charge-exchange amplitudes measured in the dp -> ppn reaction
• Direct Simulation of Low-Pressure Supersonic Gas Expansions and its Experimental Verification

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