Abstract
Abstract The plasma accelerator “VIKA” at the Efremov Institute, St. Petersburg was used to simulate the thermal auench phase of ITER tokamak plasma disruption. The pulse duration τ = 0.36 ms, energy density at the target E1 = 10 MJ/m2 and direct ton energy E i = 130 eV have been achieved. The spectroscopy methods and method of the laser beam (γ. = 0.63 μm) absorption were used to uwestigate the near-target (shielding layer) plasma parameters in experiments with graphite and tungsten targets. Electron plasma temperature of the near-target plasma Te ≈ 10 eV in the central plasma regions and Te = 3-5 eV in the external areas have been measured. The values of the near-target plasma density (ne ≥ 1018 cm−3) and their time-spatial distributions have been obtained. The experimental results are compared with the numerical simulation data, the conclusions are made on the adequacy of the implemented material tests, with the VIKA-facility used, to the expected ITER conditions. The brief review of recent publication...
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