TY  - CONF
AU  - El-Kordy, Tarek
AU  - Engels, Ralf W.
AU  - Faatz, N.
AU  - Costa Pinto, P.
AU  - Di Nezza, P.
AU  - Ferro-Luzzi, M.
AU  - Grigoryev, K.
AU  - Langer, Chr.
AU  - Kannis, C.
AU  - Pütz, Simon Jakob
TI  - Tests of amorphous carbon-coated storage cells for a polarized gas target at LHCb and further results
JO  - Chinese physics / C
VL  - 49
IS  - 8
SN  - 1674-1137
CY  - Bristol [u.a.]
PB  - IOP Publ.
M1  - FZJ-2025-04037
SP  - 084002 -
PY  - 2025
AB  - 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.
T2  - The 11th International Conference on Nuclear Physics at Strorage Rings
CY  - 18 Nov 2024 - 22 Nov 2024, Huizhou (Peoples R China)
Y2  - 18 Nov 2024 - 22 Nov 2024
M2  - Huizhou, Peoples R China
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
DO  - DOI:10.1088/1674-1137/add70e
UR  - https://juser.fz-juelich.de/record/1046969
ER  -