Carbon nanotubes as anisotropic target for dark matter
arXiv:1911.01122 · doi:10.1088/1742-6596/1468/1/012232
Abstract
Directional detection of Dark Matter (DM) particles could be accomplished by studying either ion or electron recoils in large arrays of parallel carbon nanotubes. For instance, a MeV mass DM particle could scatter off a lattice electron, resulting in the transfer of sufficient energy to eject the electron from the nanotube surface. The electron can eventually be detected whenever an external electric field is added to drive it from the open ends of the array. This detection scheme would offer an anisotropic response and could be used to select an orientation of the target with respect to the DM wind. A compact sensor, in which the cathode element is substituted with a dense array of parallel carbon nanotubes, could serve as the basic detection unit which - if adequately replicated - would allow to explore a significant region of light DM mass and cross-section. A similar detection scheme could be used to detect DM particles with mass in the GeV range scattering off the surface of a CNT and ejecting a carbon ion. We report about the Monte Carlo simulations of such a system and the R&D towards a detector prototype.
arXiv comment4 pages 5 figure oprepared for proceedings of TAUP 2019
References in corpus (6)
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- Absolute efficiency of a two-stage microchannel plate for electrons in the 30 - 900 eV energy range
- The Non-Relativistic Effective Field Theory Of Dark Matter-Electron Interactions