Amorphous carbon-coated storage cell tests for the polarized gas target at LHCb
The LHC beams cannot be polarized. Hence, the implementation of a dense polarized gas target at the LHCb experiment at CERN, to be operated simultaneously with beam–beam collisions, will enable high-energy fixed target interactions to explore a range of spin physics measurements. Using an atomic beam source at the Forschungszentrum Jülich to provide a polarized atomic 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 polarization during recombination exceeding 74% was observed. We were able to generate H2 molecules with a nuclear polarization of −0.59. Remarkably, no water layer accumulated on the cooled storage cell surface, even over extended periods. Furthermore, we examined the influence of Lyman-α radiation on the recombination rate on carbon, addressing a prominent question in the field of astrophysics.
Authors
- R. Engels (ORCID: https://orcid.org/0000-0002-6430-9280)
- Harsh Sharma (ORCID: https://orcid.org/0009-0004-2885-4742)
- K. Grigoryev (ORCID: https://orcid.org/0000-0002-6693-8021)
- V. Verhoeven (ORCID: https://orcid.org/0000-0003-0149-6979)
- Chrysovalantis Kannis (ORCID: https://orcid.org/0000-0002-2915-472X)
- P. Costa Pinto (ORCID: https://orcid.org/0009-0004-2759-1813)
- Nicolas Faatz (ORCID: https://orcid.org/0000-0003-0725-9253)
- S. Pütz (ORCID: https://orcid.org/0009-0005-0784-3128)
- M. Ferro-Luzzi (ORCID: https://orcid.org/0009-0008-1868-2165)
- T. El-Kordy (ORCID: https://orcid.org/0009-0009-4077-8857)
- P. Di Nezza (ORCID: https://orcid.org/0000-0003-4894-6762)
Institutions
- Istituto Nazionale di Fisica Nucleare (IT)
- GSI Helmholtz Centre for Heavy Ion Research (DE)
- Forschungszentrum Jülich (DE)
- University of Cologne (DE)
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT)
- Heinrich Heine University Düsseldorf (DE)
- European Organization for Nuclear Research (CH)
- RWTH Aachen University (DE)
- FH Aachen (DE)
Publication Details
- Journal
- Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
- Published
- 2024-08-23
- DOI
- https://doi.org/10.1016/j.nima.2024.169707
- Primary Topic
- Diamond and Carbon-based Materials Research
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Deutsche Forschungsgemeinschaft
- Westfälische Wilhelms-Universität Münster