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@INPROCEEDINGS{Heidbrink:1031189,
      author       = {Heidbrink, W. W. and Baylor, L. R. and Büscher, M. and
                      Engels, R. W. and Garcia, A. V. and Ghiozzi, A. G. and
                      Miller, G. W. and Sandorfi, A. M. and Wei, X.},
      title        = {{A} research program to measure the lifetime of spin
                      polarized fuel},
      journal      = {Proceedings of Science},
      volume       = {456},
      publisher    = {Sissa Medialab Trieste, Italy},
      reportid     = {FZJ-2024-05593},
      pages        = {PoS(SPIN2023)107},
      year         = {2024},
      comment      = {Proceedings of 25th International Symposium on Spin Physics
                      — PoS(SPIN2023) - Sissa Medialab Trieste, Italy, 2024. -
                      ISBN - doi:10.22323/1.456.0107},
      booktitle     = {Proceedings of 25th International
                       Symposium on Spin Physics —
                       PoS(SPIN2023) - Sissa Medialab Trieste,
                       Italy, 2024. - ISBN -
                       doi:10.22323/1.456.0107},
      abstract     = {The use of spin polarized fuel could increase the
                      deuterium-tritium (D-T) fusion cross section by a factor of
                      1.5 and, owing to alpha heating, increase the fusion power
                      by an even larger factor.Issues associated with the use of
                      polarized fuel in a reactor are identified.Theoretically,
                      nuclei remain polarized in a hot fusion plasma. The
                      similarity between the Lorentz force law and the Bloch
                      equations suggests polarization can be preserved despite the
                      rich electromagnetic spectrum present in a magnetic fusion
                      device. The most important depolarization mechanisms can be
                      tested in existing devices.The use of polarized deuterium
                      and $^3$He in an experiment avoids the complexities of
                      handling tritium, while encompassing the same nuclear
                      reaction spin-physics, making it a useful proxy to study
                      issues associated with full D-T implementation. $^3$He fuel
                      with 65\% polarization can be prepared by permeating
                      optically-pumped $^3$He into a shell pellet. Dynamically
                      polarized $^7$Li-D pellets can achieve 70\% vector
                      polarization for the deuterium.Cryogenically-frozen pellets
                      can be injected into fusion facilities by special injectors
                      that minimize depolarizing field gradients. Alternatively,
                      polarized nuclei could be injected as a neutral beam. Once
                      injected, the lifetime of the polarized fuel is monitored
                      through measurements of escaping charged fusion products.
                      Multiple experimental scenarios to measure the polarization
                      lifetime in the DIII-D tokamak and other
                      magnetic-confinement facilities are discussed, followed by
                      outstanding issues that warrant further study.},
      month         = {Sep},
      date          = {2023-09-24},
      organization  = {25th International Symposium on Spin
                       Physics, Durham (USA), 24 Sep 2023 - 29
                       Sep 2023},
      cin          = {IKP-2 / PGI-6},
      cid          = {I:(DE-Juel1)IKP-2-20111104 / I:(DE-Juel1)PGI-6-20110106},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612)},
      pid          = {G:(DE-HGF)POF4-612},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.22323/1.456.0107},
      url          = {https://juser.fz-juelich.de/record/1031189},
}