Figure 1 (IMAGE) American Physical Society Caption Destructive magnetic perturbations create a complex 3-D structure of magnetic field lines that randomly wander inside the tokamak. The red line shows the 3-D trajectory of an example field line, and each field line can have a significantly different trajectory. The colors of the cross-section represent the length of field line trajectory through each area, from short (black) to long (yellow) lengths. Credit Min-Gu Yoo Usage Restrictions Use with credit License Original 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.