Helicon Plasma Thruster (IMAGE) Tohoku University Caption (a) Photograph of the helicon plasma thruster at Tohoku University. (b) The measured plasma pressure profile and the particle dynamics relating to the loss of axial momentum loss. Credit Kazunori Takahashi Usage Restrictions Credit: Kazunori Takahashi License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.