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Physics > Instrumentation and Detectors

arXiv:1602.03216 (physics)
[Submitted on 9 Feb 2016 (v1), last revised 10 Jun 2016 (this version, v2)]

Title:WIMP detection and slow ion dynamics in carbon nanotube arrays

Authors:G. Cavoto, E.N.M. Cirillo, F. Cocina, J. Ferretti, A.D. Polosa
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Abstract:Large arrays of aligned carbon nanotubes (CNTs), open at one end, could be used as target material for the directional detection of weakly interacting dark matter particles (WIMPs). As a result of a WIMP elastic scattering on a CNT, a carbon ion might be injected in the body of the array and propagate through multiple collisions within the lattice. The ion may eventually emerge from the surface with open end CNTs, provided that its longitudinal momentum is large enough to compensate energy losses and its transverse momentum approaches the channeling conditions in a single CNT. Therefore, the angle formed between the WIMP wind apparent orientation and the direction of parallel carbon nanotube axes must be properly chosen. We focus on very low ion recoil kinetic energies, related to low mass WIMPs (~ 10 GeV) where most of the existing experiments have low sensitivity. Relying on some exact results on two-dimensional lattices of circular obstacles, we study the low energy ion motion in the transverse plane with respect to CNT directions. New constraints are obtained on how to devise the CNT arrays to maximize the detection efficiency.
Comments: 10 pages, 12 figures, comments and clarifications added, to appear in EPJC
Subjects: Instrumentation and Detectors (physics.ins-det); Instrumentation and Methods for Astrophysics (astro-ph.IM); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1602.03216 [physics.ins-det]
  (or arXiv:1602.03216v2 [physics.ins-det] for this version)
  https://doi.org/10.48550/arXiv.1602.03216
Related DOI: https://doi.org/10.1140/epjc/s10052-016-4193-7

Submission history

From: A. D. Polosa [view email]
[v1] Tue, 9 Feb 2016 23:08:53 UTC (1,054 KB)
[v2] Fri, 10 Jun 2016 10:31:37 UTC (1,055 KB)
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