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

Sunn Pedersen, Thomas; Dinklage, Andreas; Turkin, Yuriy; Wolf, Robert; Bozhenkov, Sergey; Geiger, Joachim; Fuchert, Golo; Bosch, Hans-Stephan; Rahbarnia, Kian; Thomsen, Henning; Neuner, Ulrich; Klinger, Thomas; Langenberg, Andreas; Trimiño Mora, Humberto; Kornejew, Petra; Knauer, Jens; Hirsch, Matthias; Pablant, Novimir

doi:10.1063/1.4983629

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

Journal Article · Thu May 18 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4983629· OSTI ID:1361899

^[1]; Dinklage, Andreas ^[1]; Turkin, Yuriy ^[1];

^[1]; Bozhenkov, Sergey ^[1]; Geiger, Joachim ^[1]; Fuchert, Golo ^[1]; Bosch, Hans-Stephan ^[1]; Rahbarnia, Kian ^[1]; Thomsen, Henning ^[1]; Neuner, Ulrich ^[1]; Klinger, Thomas ^[1]; Langenberg, Andreas ^[1]; Trimiño Mora, Humberto ^[1]; Kornejew, Petra ^[1];

^[1]; Hirsch, Matthias ^[1]; Pablant, Novimir ^[2]

Max Planck Institute for Plasma Physics, Greifswald, Germany
Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA

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.

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Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: the W7-X Team

Grant/Contract Number:: SC0014210

OSTI ID:: 1361899

Alternate ID(s):: OSTI ID: 1421176; OSTI ID: 1624998

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Vol. 24 Journal Issue: 5; ISSN 1070-664X

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 59 works

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