@inproceedings{0d9593cdc5a64187be580f14b3f844cb,
title = "Disruptive behavior in the Compact Toroidal Hybrid torsatron-tokamak",
abstract = "Understanding the control and avoidance of major disruptions in current carrying toroidal plasmas is important in mitigating the effects of such loss of confinement. Helical configurations with low toroidal currents are largely free of disruptions, and it has long been known that a low level of vacuum transform, lvac(a) ≈ 0.1, confers some disruption immunity to current-driven toroidal discharges [1, 2]. Experiments on the Compact Toroidal Hybrid (CTH) torsatron are investigating avoidance of disruptions in Ohmically-driven, ECRH-generated plasmas in which the ratio of vacuum or external to total (external + Ohmic) transform can be lower than 10%. The minimum vacuum rotational transform in which helical discharges can be obtained in CTH to date is lvac(a) ≈ 0.04. At or near these values, disruptions may take place when lTOTAL(a) ≈ 0.5 and strong MHD activity is typically observed. Disruptivity is noticeably reduced when the vertical position of the plasma is controlled to prevent or delay vertical displacement events. Interpretation of these results makes use of threedimensional equilibrium reconstruction from magnetic diagnostics using the V3FIT code [3].",
author = "Maurer, {D. A.} and Knowlton, {S. F.} and Hanson, {J. D.} and Hartwell, {G. J.} and Miller, {M. C.} and Stevenson, {B. A.} and X. Ma and J. Herfindal and M. Pandya",
year = "2012",
language = "English",
isbn = "9781622769810",
series = "39th EPS Conference on Plasma Physics 2012, EPS 2012 and the 16th International Congress on Plasma Physics",
pages = "830--833",
booktitle = "39th EPS Conference on Plasma Physics 2012, EPS 2012 and the 16th International Congress on Plasma Physics",
note = "39th EPS Conference on Plasma Physics 2012, EPS 2012 and the 16th International Congress on Plasma Physics ; Conference date: 02-07-2012 Through 06-07-2012",
}