Method for Calculating Spatial Resolution of Heavy Ion Beam Probing for the T-15MD Tokamak

Heavy ion beam probing (HIBP) is a unique diagnostic technique that enables independent and simultaneous measurement of the plasma electric potential $$\varphi $$ and its fluctuations $$\tilde {\varphi }$$ , as well as the electron density fluctuations $${{\tilde {n}}_{e}}$$ and poloidal magnetic field $${{\tilde {B}}_{{{\text{pol}}}}}$$ in the hot plasma region. A method for calculating the spatial resolution of the designed HIBP diagnostics for the T-15MD tokamak has been presented. The dependence of the size of the measurement area point on the width of the input slits in the energy analyzer has been studied.