The Polarized H and D Atomic Beam Source for ANKE at COSY-J\"ulich

A polarized atomic beam source was developed for the polarized internal storage-cell gas target at the magnet spectrometer ANKE of COSY-J"ulich. 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 $p_{\rm z}\approx\pm0.92$. For the deuterium beam, the obtained combinations of vector and tensor ($p_{\mathrm{z}\mathrm{z}}$) polarizations are $p_{\mathrm{z}}\approx \pm 0.90$ (with a constant $p_{\mathrm{z}\mathrm{z}}\approx +0.86$), and $p_{\mathrm{z}\mathrm{z}}=+0.90$ or $p_{\rm zz}=-1.71$(bothwithvanishing$p_{\rm z}$). The paper includes a detailed technical description of the apparatus and of the investigations performed during the development.