Gas jet formation using a plasma accelerator

A method for forming a neutral helium flux using a plasma accelerator is proposed. The method consists in the transformation of a dense and cold plasma jet into gas stream. For this purpose, the plasma was passed through a long channel in which it could recombine as it moved. A gas stream could form at the outlet of recombination duct, velocity of which is close to plasma flow velocity. As a result of conducted research, conditions were found under which jet of neutral helium was mainly coming out of duct at velocity of about ten kilometers per second. Helium jet moving at high velocity is planned to be used as part of helium polychromator for deep penetration into wall plasma in Globus-M2 tokamak.