External kink related sideways force on the tokamak wall
The external kink related sideways wall force is investigated on ultralow-q RFX-mod plasma discharge. Several theoretical predictions are experimentally verified. The presence of coupled kink modes is observed when the wall is subject to a sideways force. The absence of an integral electromagnetic f...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | Nuclear Fusion |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1741-4326/ada36f |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The external kink related sideways wall force is investigated on ultralow-q RFX-mod plasma discharge. Several theoretical predictions are experimentally verified. The presence of coupled kink modes is observed when the wall is subject to a sideways force. The absence of an integral electromagnetic force on the plasma is analyzed in such conditions. The dependence of sideways force on the mode growth rate is also revealed. A comparison between different theoretical predictions of the sideways force magnitude is performed for both flat-top and ramp-down phases. The results are compared with the direct calculation of sideways force provided by the ex-vessel magnetic measurements. These analyses show that the sideways force related to kink-like mode is much smaller than predicted by models that approximate the plasma as a rigid current-carrying ring or that neglect the presence of the wall. |
|---|---|
| ISSN: | 0029-5515 |