Application of an intense long pulse electron beam for investigation of iter divertor material erosion

To test ITER divertor candidate materials and to check the physical models for simulation of the divertor material erosion under plasma disruption conditions the measurements of target plasma dynamic and material erosion have to be performed. The energy fluxes with pulse duration ≥ 100 µs and power densities ≥ 5 MW/cm² are required. The paper describes the facility ELDIS producing an electron beam which parameters are close to required ones. The facility consist of three main parts: vacuum diode with multipoint explosive emission cathode, accelerating tube, and magnetic compression channel. Kinetic energy of electrons is 60–140 keV, maximum power density at the target 5 MW/cm², pulse duration - up to 60 µs, beam diameter at the target-1.2 cm, magnetic field induction at the target - up to 4 T. The results of the measurements and calculation of electron. beam parameters and some results of the target plasma dynamics and target erosion investigation are given