Ion beam fusion plasma. Ablation and heating regimes

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Abstract
The one-dimensional self-similar motion generated by an intense ion beam pulse, of energy per nucleon Eb=E0(t/ tau )2/3 and current intensity per unit area Ib=I0(t/ tau )1/3(01 results show that there exists a well defined ablation surface separating an isentropic compression region from a much wider expansion flow where the beam energy absorption occurs; the ablation pressure and the ablated plasma flow rate as a function of the beam parameters are found from the analysis; the efficiency of the acceleration of thin foils have been also calculated. For alpha <<1, the analysis shows the existence of a rarefaction wave that separates a heating region (where plasma convection is negligible) developing into the undisturbed plasma from a much thinner expansion flow region. Profiles of beam velocity, density and temperature, through the entire motion have been obtained.