Boudewijn van Milligen

Melt extraction and accumulation from partially molten rocks

Publisher: Elsevier BV

Date: 10-2004

DOI: 10.1016/J.LITHOS.2004.04.041

Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X

Publisher: IOP Publishing

Date: 04-2022

DOI: 10.1088/1741-4326/AC2CF5

Abstract: We present recent highlights from the most recent operation phases of Wendelstein 7-X, the most advanced stellarator in the world. Stable detachment with good particle exhaust, low impurity content, and energy confinement times exceeding 100 ms, have been maintained for tens of seconds. Pellet fueling allows for plasma phases with reduced ion-temperature-gradient turbulence, and during such phases, the overall confinement is so good (energy confinement times often exceeding 200 ms) that the attained density and temperature profiles would not have been possible in less optimized devices, since they would have had neoclassical transport losses exceeding the heating applied in W7-X. This provides proof that the reduction of neoclassical transport through magnetic field optimization is successful. W7-X plasmas generally show good impurity screening and high plasma purity, but there is evidence of longer impurity confinement times during turbulence-suppressed phases.

Layered intrusions and traffic jams

Publisher: Geological Society of America

Date: 2015

DOI: 10.1130/G36276.1

Utrecht University

Location: Netherlands

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Centro De Investigaciones Energéticas Medioambientales Y Tecnológicas

Location: Spain

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