期刊
出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0168-9002(03)00986-0
关键词
atomic beam source; internal target; high frequency transitions; polarization; hydrogen; deuterium
The HERMES atomic beam source is used to provide nuclear polarized hydrogen or deuterium atoms for the HERMES target. The setup including the dissociator, the sextupole magnet system and the high-frequency transitions is described. Measurements of the hydrogen intensity of up to 6.4 x 10(16) atoms/s in two hyperfine substates and of the deuterium intensity of up to 5.8 x 10(16) atoms/s in three hyperfine substates are presented. A degree of dissociation of 92.8% for H (94.5% for D) at the entrance of the storage cell and a nuclear polarization of around 0.97 (H) and 0.92 (D) have been found constant within a couple of percent over the whole running period of the HERMES experiment. (C) 2003 Published by Elsevier Science B.V.
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