The HERMES polarized atomic beam source

Abstract 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 6.4×10 16 atoms / s in two hyperfine substates and of the deuterium intensity of up to 5.8×10 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 f... Mehr ...

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Verfasser: M. Henoch
G. Ciullo
Martin Raithel
J. Stewart
P. Lenisa
H. Kolster
D. Reggiani
G. Graw
G.R. Court
B. Braun
E. Steffens
H. Marukyan
Ralf Hertenberger
M. C. Simani
A. Nass
W. Haeberli
P.F. Dalpiaz
N. Koch
Klaus Rith
A. Golendukhin
T. Wise
P. Tait
C. Baumgarten
Dokumenttyp: Artikel
Erscheinungsdatum: 2003
Schlagwörter: Netherlands / Aurora Universities Network / Instrumentation / Nuclear and High Energy Physics
Sprache: Englisch
Permalink: https://search.fid-benelux.de/Record/base-27200582
Datenquelle: BASE; Originalkatalog
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Link(s) : https://www.openaccessrepository.it/record/137863

Abstract 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 6.4×10 16 atoms / s in two hyperfine substates and of the deuterium intensity of up to 5.8×10 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.