Image potential in the interaction of fast ions with carbon nanotubes: A comparison between the one- and two-fluid hydrodynamic models

• We study the interaction of protons with carbon nanotubes under channeling conditions.
• We use the linearized, 2D, one-fluid and two-fluid hydrodynamic models.
• The image potential for a proton moving parallel to the nanotube axis is calculated.
• Results for the image potential are compared for different types of nanotubes.
• We also compute the angular and spatial distributions of channeled protons.

We study the interaction of charged particles with four different types of single-walled carbon nanotubes (SWNTs) under channeling conditions by means of the linearized, two dimensional, one-fluid and two-fluid hydrodynamic models. The models are used to calculate the image potential for protons moving parallel to the axis of the SWNTs at the speeds up to 10 a.u. Numerical results are obtained to show the influence of the damping factor, the nanotube radius, and the particle position on the image potential inside the nanotube. We also compute the spatial and angular distributions of protons and compare them for the two models.