Structure of the runaway electron loss during induced disruptions in TEXTOR

Wongrach, K.; Willi, O.; Abdullaev, Sadrilla; Zeng, L.; Xu, Y.; Finken, K. H.

doi:10.1063/1.4933131

Journal Article

FZJ-2016-01191

Structure of the runaway electron loss during induced disruptions in TEXTOR

Wongrach, K. ; Finken, K. H. ; Abdullaev, S.FZJ* ; Willi, O. ; Zeng, L. ; Xu, Y.

2015
American Institute of Physics [S.l.]

Physics of plasmas 22(10), 102508 - (2015) [10.1063/1.4933131]

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Please use a persistent id in citations: http://hdl.handle.net/2128/9788 doi:10.1063/1.4933131

Abstract: The loss of runaway electrons during an induced disruption is recorded by a synchrotron imaging technique using a fast infrared CCD camera. The loss is predominantly diffuse. During the “spiky-loss phase”, when the runaway beam moves close to the wall, a narrow channel between the runaway column and a scintillator probe is formed and lasts until the runaway beam is terminated. In some cases, the processed images show a stripe pattern at the plasma edge. A comparison between the MHD dominated disruptions and the MHD-free disruption is performed. A new mechanism of plasma disruptions with the runaway electron generation and a novel model which reproduces many characteristic features of the plasma beam evolution during a disruption is briefly described.

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