Pulse intense proton beam facility for iter disruptions simulation

To determine erosion rates of divertor materials under plasma disruption conditions an intense proton beam with particles energy 10–30 ke V, power density at a target 10 MW/cm² and pulse duration more than 10µs is needed Such a beam can be obtained in the facility consisting of two main parts: a vacuum diode for a beam generation and a focusing channel for its transportation and focusing at a target. As a first version of the protons source design an adsorbate anode was chosen because of its simplicity and small divergence of a proton beam. A multipoint explosive emission cathode is used as a cathode part of a diode. Beam focusing to the needed cross section is provided by means of combination of ballistic focusing at a first stage and magnetic compression at a second one. The results of calculations and experimental investigations aimed at the creation of such a facility are given in the paper.