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@INPROCEEDINGS{Engels:1040663,
      author       = {Engels, Ralf W. and Costa Pinto, Pedro and Di Nezza,
                      Pasquale and El-Kordy, Tarek and Ferro-Luzzi, Massimiliano
                      and Grigoryev, Kirill and Kannis, Chrysovalantis and Pütz,
                      Simon Jakob},
      title        = {{A}morphous {C}arbon-coated {S}torage {C}ell {T}ests for
                      the {P}olarized {G}as {T}arget at {LHC}b},
      volume       = {472},
      publisher    = {Sissa Medialab Trieste, Italy},
      reportid     = {FZJ-2025-01994},
      pages        = {050},
      year         = {2025},
      abstract     = {The LHC beams cannot be polarized. Hence, the
                      implementation of a dense polarized gas targetat the LHCb
                      experiment at CERN, to be operated simultaneously with
                      beam-beam collisions,will enable fixed target interactions
                      to explore a new energy range of spin physics
                      measurements.Unfortunately, typical surface coatings like
                      water, Teflon or aluminium, normally used to
                      avoidpolarization losses, are forbidden due to vacuum and
                      beam policies.Using the former ANKE atomic beam source at
                      Forschungszentrum Jülich to provide a polarizedatomic
                      hydrogen beam, we investigated the properties of a storage
                      cell coated with amorphous carbon. A notable recombination
                      rate, lying between 93 and $100\%,$ and a preservation of
                      polarizationduring recombination exceeding $74\%$ was
                      observed. We were able to generate $H_2$ molecules witha
                      nuclear polarization of P∼0.59. Remarkably, no water layer
                      accumulated on the cooled storagecell surface, even over
                      extended periods. Furthermore, we examined the influence of
                      Lyman-radiation on the recombination rate on carbon,
                      addressing a prominent question in the field
                      ofastrophysics.A similar talk was given at "1𝑠𝑡
                      Workshop on Polarized Beam and Target - Physics and
                      Applications (PBT2024)" from 26.-28.02.2024 in Huizhou,
                      China, by T. El-Kordy and is based on acorresponding paper
                      [1].},
      month         = {Sep},
      date          = {2024-09-22},
      organization  = {20th International Workshop on
                       Polarized Source, Targets, and
                       Polarimetry, Jefferson Lab (Newport
                       News), 22 Sep 2024 - 27 Sep 2024},
      cin          = {IKP-2 / ITE},
      cid          = {I:(DE-Juel1)IKP-2-20111104 / I:(DE-Juel1)ITE-20250108},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612) / DFG
                      project G:(GEPRIS)533904660 - Eine vielseitige
                      Polarisationsmethode für Teilchen mit einfachen
                      Hyperfeinstrukturen (533904660)},
      pid          = {G:(DE-HGF)POF4-612 / G:(GEPRIS)533904660},
      typ          = {PUB:(DE-HGF)8},
      doi          = {10.22323/1.472.0050},
      url          = {https://juser.fz-juelich.de/record/1040663},
}