@article{1,
  author = {H.M. Smith and A.H. Boozer and P. Helander},
  title = {Passive runaway electron suppression in tokamak disruptions},
  abstract = { <p>Runaway electrons\&nbsp;created in disruptions pose a serious problem for\&nbsp;tokamaks\&nbsp;with large\&nbsp;current.\&nbsp;It would be desirable to have a\&nbsp;runaway electron\&nbsp;suppression method which is passive, i.e., a method that does not rely on an uncertain disruption prediction system. One option is to let the large\&nbsp;electric field\&nbsp;inherent in the disruption drive helical\&nbsp;currents\&nbsp;in the wall. This would create ergodic regions in the plasma and increase the runaway losses. Whether these regions appear at a suitable time and place to affect the formation of the runaway beam depends on disruption parameters, such as electron temperature and density. We find that it is difficult to ergodize the central plasma before a beam of runaway\&nbsp;current\&nbsp;has formed. However, the ergodic outer region will make the Ohmic\&nbsp;current\&nbsp;profile contract, which can lead to\&nbsp;instabilities\&nbsp;that yield large\&nbsp;runaway electronlosses.</p>
 },
  year = {2013},
  journal = {Physics of Plasma},
  volume = {20},
  month = {07/2013},
  doi = {https://aip.scitation.org/doi/10.1063/1.4813255},
  language = {eng},
}