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Abstract

The limitation of ablation on rational surfaces has been shown to be an efficient mechanism of striation formation during pellet ablation. In JET, a very large striation is observed when the pellet crosses the q=1 surface. This paper presents a thorough analysis of the pellet ablation in this region and shows that an extended shearless zone around q=1 is necessary to reproduce the experimental signal. Such a feature is likely to be an essential ingredient in the understanding of internal disruptions.

Additional information

Authors: PEGOURIE B, CEA, CEN CADARACHE, SAINT-PAUL-LEZ-DURANCE (FR);JET JOINT UNDERTAKING, ABINGDON, OXON. (GB);DUBOIS M A, CEA, CEN CADARACHE, SAINT-PAUL-LEZ-DURANCE (FR);JET JOINT UNDERTAKING, ABINGDON, OXON. (GB);GILL R D CEA, CEN CADARACHE, SAINT-PAUL-LEZ-DURANCE (FR), CEA, CEN CADARACHE, SAINT-PAUL-LEZ-DURANCE (FR);JET JOINT UNDERTAKING, ABINGDON, OXON. (GB);JET JOINT UNDERTAKING, ABINGDON, OXON. (GB), CEA, CEN CADARACHE, SAINT-PAUL-LEZ-DURANCE (FR);JET JOINT UNDERTAKING, ABINGDON, OXON. (GB)
Bibliographic Reference: PAPER PRESENTED: 16TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, VENEZIA (IT), MARCH 13-17, 1989 AVAILABLE FROM COMMISSION OF THE EUROPEAN COMMUNITIES, DG XIII-C-3, L-2920 LUXEMBOURG AS PAPER EN 35090 ORA
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