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@INPROCEEDINGS{Engels:1046981,
      author       = {Engels, Ralf W. and Kannis, Chrysovalantis and Salmann,
                      Jonas and Faatz, Nicolas and Pütz, Simon Jakob and
                      El-Kordy, Tarek and Verhoeven, Vincent Johannes},
      title        = {{C}urrent developments of polarized sources and polarimeter
                      at {FZ} {J}ülich and further applications},
      reportid     = {FZJ-2025-04049},
      year         = {2025},
      abstract     = {A better theoretical understanding of the quantum
                      mechanical processes in spin filter for the separation of
                      metastable hydrogen atoms in individual hyperfine substates
                      enables a number of new applications. For example, it is now
                      possible to build a new generation of Lamb-shift polarimeter
                      that can separate not only α but also the β states with
                      m$_J$=−1/2. This opens up completely new possibilities for
                      the search of hydrogen atoms in forbidden substates after
                      the bound beta decay of the neutron. At the same time,
                      corresponding simulations also provide the parameters for
                      designing a Lamb-shift polarimeter for $^3$He$^+$ ions.
                      Furthermore, it has recently been shown that classical
                      Lamb-shift polarimeter can determine the polarization, in
                      addition to protons/deuterons and H/D atoms, of H$_2$/D$_2$
                      molecules as well as all possible ion beam species, i.e.
                      H$^+_2$/D$^+_2$/HD$^+$,H$^−$/D$^−$ or even H$^+_3$.In
                      parallel, this knowledge might help to create a new type of
                      optically pumped polarized source by transferring a
                      laser-induced polarization of the rotational magnetic moment
                      to the nucleons in H$_2$/D$_2$ and HD molecules. These
                      techniques might also be used for the production and
                      detection of polarized fuel for the enhancement of the
                      energy output of nuclear fusion reactors or the production
                      of hyperpolarized probes in medicine.A recent application
                      was a proof-of-principle measurement of the polarization
                      conservation in H$_2$ molecules after recombination of
                      polarized atoms in a carbon-coated storage cell, similar to
                      the cell that is foreseen for a planned polarized target at
                      the LHCb experiment. In addition, in some more exotic
                      experiments the components of a Lamb-shift polarimeter can
                      be used to detect axions or “dark hydrogen”.},
      month         = {Sep},
      date          = {2025-09-21},
      organization  = {26th International Symposium on Spin
                       Physics, Qingdao (Peoples R China), 21
                       Sep 2025 - 26 Sep 2025},
      subtyp        = {After Call},
      cin          = {IKP-2 / IKP-1 / ITE},
      cid          = {I:(DE-Juel1)IKP-2-20111104 / I:(DE-Juel1)IKP-1-20111104 /
                      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)6},
      url          = {https://juser.fz-juelich.de/record/1046981},
}