Dissipation Effects in the Ratchetlike Fermi Acceleration

Figure 4

Evolution of 500 chaotic orbits on the phase space 𝑉×𝜙 for the parameters 𝜇=10,𝑣₀=0.2 for case 𝐃(Δ𝜂=−0.01,𝜂₁=1.01,𝜂₂=1.00). For (a) 𝛾=0.0 and (b) 𝛾=10⁻⁶. The mean values of the velocity, calculated over 3000 trajectories, are shown in (c)–(f) and are related to the cases 𝛾=0.0,10⁻⁶,10⁻⁵,10⁻⁴,10⁻³,10⁻²,10⁻¹.

(a)

(b)

(c)

(d)

(e)

(f)