Probing ion trajectory simulations for the HIBP diagnostics at the T-15MD tokamak

Abstract

The paper presents the results of preliminary simulations of the Tl+ ion trajectories and detector grids for Heavy Ion Beam Probe (HIBP) diagnostics at the T-15MD tokamak. For these calculations, authors have developed the HIBP SOLVER software package using the Runge-Kutta method of the 4th order for solving the motion equation for the probing particles. Simulations have shown that the HIBP diagnostics at the T-15MD tokamak will allow measuring the entire radial profile of the plasma potential during one shot, including both the core and edge regions. The detector grid covers the most area of the vertical plasma cross section, so the two-dimensional potential distribution can be recovered. In the start regime (1 T, 1 MA), the beam energy will be below 300 keV, and in the standard regime (2 T, 2 MA), the beam energy will amount to 1000 keV.