Tuning of the rotational transform in Wendelstein 7-X
Lazerson, Samuel A.; Gao, Yu; Hammond, Kenneth; Killer, Carsten; Schlisio, Georg; Otte, Matthias; Biedermann, Christoph; Spolaore, Monica; Bozhenkov, Sergey A.; Geiger, Joachim; Grulke, Olaf; Blackwell, Boyd
The control of rotational transform in Wendelstein 7-X (W7-X) is key to both the island divertor operation and safety of plasma facing components. The island divertor concept in W7-X relies on an edge flux surface with rotational transform of ι - = 1 resonating with an intrinsic n/m = 5/5 resonance to form a five lobed island chain. This island chain intersects with divertor plates to give rise to the island divertor. Changes in the relative position of the rational surface and the divertor...[Show more]
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