Mode observations and confinement characterization during configuration scans in Wendelstein 7-X

W7-X Team

Mode observations and confinement characterization during configuration scans in Wendelstein 7-X

W7-X Team

PPPL Advanced Projects

Research output: Contribution to conference › Paper › peer-review

Abstract

In configuration scans, conducted between standard and high-iota magnetic configurations, rotational transform variation revealed an increase of the diamagnetic energy and confinement time in several intermediate limiter configurations. These observations were accompanied by the appearance of mode activity, shown by various diagnostics. The mode activity correlates with the size of the internal islands and becomes more intense with the island enlargement, decreasing with the reduction of the island size. The change of the island size seems to have no effect on the diamagnetic energy in the discharges with identical densities and heating power.

Original language	English (US)
State	Published - 2019
Event	46th European Physical Society Conference on Plasma Physics, EPS 2019 - Milan, Italy Duration: Jul 8 2019 → Jul 12 2019

Conference

Conference	46th European Physical Society Conference on Plasma Physics, EPS 2019
Country/Territory	Italy
City	Milan
Period	7/8/19 → 7/12/19

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

Cite this

@conference{a861f36f74f64cdba9ae9e55fe0d10b1,

title = "Mode observations and confinement characterization during configuration scans in Wendelstein 7-X",

abstract = "In configuration scans, conducted between standard and high-iota magnetic configurations, rotational transform variation revealed an increase of the diamagnetic energy and confinement time in several intermediate limiter configurations. These observations were accompanied by the appearance of mode activity, shown by various diagnostics. The mode activity correlates with the size of the internal islands and becomes more intense with the island enlargement, decreasing with the reduction of the island size. The change of the island size seems to have no effect on the diamagnetic energy in the discharges with identical densities and heating power.",

author = "\{W7-X Team\} and T. Andreeva and M. Hirsch and G. Wurden and A. Alonso and Beidler, \{C. D.\} and M. Beurskens and S. Bozhenkov and R. Brakel and C. Brandt and Brunner, \{K. J.\} and R. Burhenn and V. Bykov and A. Dinklage and G. Fuchert and J. Geiger and M. Grahl and O. Grulke and U. H{\"o}fel and M. Jakubowski and G. Kocsis and T. Klinger and J. Knauer and A. Kr{\"a}mer-Flecken and A. Langenberg and S. Lazerson and U. Neuner and C. N{\"u}hrenberg and N. Pablant and K. Rahbarnia and J. Schilling and Schmitt, \{J. C.\} and H. Thomsen and E. Trier and T. Windisch and J. Zhu and S. Zoletnik",

year = "2019",

language = "English (US)",

}

TY - CONF

T1 - Mode observations and confinement characterization during configuration scans in Wendelstein 7-X

AU - W7-X Team

AU - Andreeva, T.

AU - Hirsch, M.

AU - Wurden, G.

AU - Alonso, A.

AU - Beidler, C. D.

AU - Beurskens, M.

AU - Bozhenkov, S.

AU - Brakel, R.

AU - Brandt, C.

AU - Brunner, K. J.

AU - Burhenn, R.

AU - Bykov, V.

AU - Dinklage, A.

AU - Fuchert, G.

AU - Geiger, J.

AU - Grahl, M.

AU - Grulke, O.

AU - Höfel, U.

AU - Jakubowski, M.

AU - Kocsis, G.

AU - Klinger, T.

AU - Knauer, J.

AU - Krämer-Flecken, A.

AU - Langenberg, A.

AU - Lazerson, S.

AU - Neuner, U.

AU - Nührenberg, C.

AU - Pablant, N.

AU - Rahbarnia, K.

AU - Schilling, J.

AU - Schmitt, J. C.

AU - Thomsen, H.

AU - Trier, E.

AU - Windisch, T.

AU - Zhu, J.

AU - Zoletnik, S.

PY - 2019

Y1 - 2019

N2 - In configuration scans, conducted between standard and high-iota magnetic configurations, rotational transform variation revealed an increase of the diamagnetic energy and confinement time in several intermediate limiter configurations. These observations were accompanied by the appearance of mode activity, shown by various diagnostics. The mode activity correlates with the size of the internal islands and becomes more intense with the island enlargement, decreasing with the reduction of the island size. The change of the island size seems to have no effect on the diamagnetic energy in the discharges with identical densities and heating power.

AB - In configuration scans, conducted between standard and high-iota magnetic configurations, rotational transform variation revealed an increase of the diamagnetic energy and confinement time in several intermediate limiter configurations. These observations were accompanied by the appearance of mode activity, shown by various diagnostics. The mode activity correlates with the size of the internal islands and becomes more intense with the island enlargement, decreasing with the reduction of the island size. The change of the island size seems to have no effect on the diamagnetic energy in the discharges with identical densities and heating power.

UR - https://www.scopus.com/pages/publications/85084019573

UR - https://www.scopus.com/inward/citedby.url?scp=85084019573&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85084019573

T2 - 46th European Physical Society Conference on Plasma Physics, EPS 2019

Y2 - 8 July 2019 through 12 July 2019

ER -

Mode observations and confinement characterization during configuration scans in Wendelstein 7-X

Abstract

Conference

All Science Journal Classification (ASJC) codes

Other files and links

Fingerprint

Cite this