Key results from the first plasma operation phase and outlook for future performance in Wendelstein 7-X

Physics of Plasmas
T Sunn PedersenN Pablant

Abstract

The first physics operation phase on the stellarator experiment Wendelstein 7-X was successfully completed in March 2016 after about 10 weeks of operation. Experiments in this phase were conducted with five graphite limiters as the primary plasma-facing components. Overall, the results were beyond the expectations published shortly before the start of operation [Sunn Pedersen et al., Nucl. Fusion 55, 126001 (2015)] both with respect to parameters reached and with respect to physics themes addressed. We report here on some of the most important plasma experiments that were conducted. The importance of electric fields on global confinement will be discussed, and the obtained results will be compared and contrasted with results from other devices, quantified in terms of the fusion triple product. Expected values for the triple product in future operation phases will also be described and put into a broader fusion perspective.

References

May 15, 2002·Physical Review Letters·Thomas Sunn Pedersen, Allen H Boozer
Feb 9, 2005·Physical Review Letters·S P GerhardtD T Anderson
Jun 4, 2008·Physical Review Letters·J P Marler, M R Stoneking
Sep 26, 2012·Physical Review Letters·J H E ProllG G Plunk
Jul 23, 2014·Reports on Progress in Physics·Per Helander
Nov 7, 2014·Physical Review Letters·P XanthopoulosJ H E Proll
Dec 3, 2016·The Review of Scientific Instruments·M KrychowiakUNKNOWN W7-X Team
Dec 3, 2016·The Review of Scientific Instruments·E PaschUNKNOWN W7-X Team

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Citations

Mar 3, 2020·The Review of Scientific Instruments·O P FordUNKNOWN W7-X Team

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Methods Mentioned

BETA
PLASMA
x-ray crystal imaging

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