This title appears in the Scientific Report :
2003
Please use the identifier:
http://dx.doi.org/10.1088/0029-5515/43/11/016 in citations.
Please use the identifier: http://hdl.handle.net/2128/1804 in citations.
Heterodyne ECE diagnostic in the mode detection and disruption avoidance at TEXTOR
Heterodyne ECE diagnostic in the mode detection and disruption avoidance at TEXTOR
The paper describes the detection of the m/n = 2/1 disruption precursor at TEXTOR. This frequently observed precursor is detected by realtime cross-correlation of two radially separated channels of the heterodyne electron cyclotron emission diagnostic. An electronic module developed to detect the pr...
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Personal Name(s): | Krämer-Flecken, A. |
---|---|
Finken, K. H. / Udintsev, H. / Larue, H. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Nuclear fusion, 43 (2003) S. 1437 - 1445 |
Imprint: |
Vienna
IAEA
2003
|
Physical Description: |
1437 - 1445 |
DOI: |
10.1088/0029-5515/43/11/016 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Nuclear Fusion
43 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1804 in citations.
The paper describes the detection of the m/n = 2/1 disruption precursor at TEXTOR. This frequently observed precursor is detected by realtime cross-correlation of two radially separated channels of the heterodyne electron cyclotron emission diagnostic. An electronic module developed to detect the precursor and its functionality is briefly described. A disruption statistic for TEXTOR is presented, from which the probability of the occurrence of the m/n = 2/1 mode is seen. A method to generate reproducible disruption precursors at TEXTOR is also presented. Experiments to avoid disruptions by inducing toroidal velocity shear by tangential neutral beam injection and mitigate disruptions by He-puffing are presented. In the experiments performed, up to 50% of the disruptions could be avoided. Furthermore, calculations of the precursor frequency and its evolution are described and compared with measurements. |