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| Home > Online First > Tests of amorphous carbon-coated storage cells for a polarized gas target at LHCb and further results |
| Journal Article/Contribution to a conference proceedings | FZJ-2025-04037 |
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2025
IOP Publ.
Bristol [u.a.]
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Please use a persistent id in citations: doi:10.1088/1674-1137/add70e
Abstract: As the LHC beams cannot be polarized, introducing a dense polarized gas target at the LHCb experiment at CERN, to be operated concurrently with beam-beam collisions, will facilitate fixed-target interactions to explore a new energy regime of spin physics measurements. Unfortunately, typical surface coatings used to avoid polarization losses, such as water, Teflon, or aluminum, are prohibited due to restrictions imposed by vacuum and beam policies. The former atomic beam source for the polarized target at ANKE@COSY (Forschungszentrum Jülich), an accompanying Lamb-shift polarimeter, and a storage cell chamber inside a superconducting magnet provide a perfect test stand to investigate the properties of a storage cell coated with amorphous carbon. A significant recombination rate, ranging from 93% to 100%, and preservation of polarization during recombination surpassing 74% were observed. We successfully produced H$_2$ molecules with a nuclear polarization of P~0.59. In addition, we could produce polarized H$_3^+$ ions for the first time and observed the shift of the axis of rotation within HD molecules.
Keyword(s): Nuclei and Particles (1st) ; Nuclear Physics (2nd)
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