Radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in W7-X
Abstract The edge island domain in Wendelstein 7-X consists of divertor islands whose position coincide with the location of rational values of the rotational transform <?CDATA ${\textrm{-}}\mkern-6mu\iota \approx(5/6, 5/5, 5/4)$?> - ι ≈ ( 5 / 6 , 5 / 5 , 5 / 4 ) and surround the main confinem...
Published in: | Plasma Physics and Controlled Fusion |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
IOP Publishing
2022
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1088/1361-6587/ac5f3f https://iopscience.iop.org/article/10.1088/1361-6587/ac5f3f https://iopscience.iop.org/article/10.1088/1361-6587/ac5f3f/pdf |
id |
crioppubl:10.1088/1361-6587/ac5f3f |
---|---|
record_format |
openpolar |
spelling |
crioppubl:10.1088/1361-6587/ac5f3f 2024-06-23T07:52:27+00:00 Radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in W7-X Schmitt, J C Kriete, D M Andreeva, T Geiger, J Grahl, M Schilling, J Thomsen, H Flom, E EUROfusion Consortium Department of Energy 2022 http://dx.doi.org/10.1088/1361-6587/ac5f3f https://iopscience.iop.org/article/10.1088/1361-6587/ac5f3f https://iopscience.iop.org/article/10.1088/1361-6587/ac5f3f/pdf unknown IOP Publishing https://iopscience.iop.org/page/copyright https://iopscience.iop.org/info/page/text-and-data-mining Plasma Physics and Controlled Fusion volume 64, issue 5, page 055022 ISSN 0741-3335 1361-6587 journal-article 2022 crioppubl https://doi.org/10.1088/1361-6587/ac5f3f 2024-06-10T04:11:32Z Abstract The edge island domain in Wendelstein 7-X consists of divertor islands whose position coincide with the location of rational values of the rotational transform <?CDATA ${\textrm{-}}\mkern-6mu\iota \approx(5/6, 5/5, 5/4)$?> - ι ≈ ( 5 / 6 , 5 / 5 , 5 / 4 ) and surround the main confinement volume (the ‘main plasma’), providing the magnetic topology for an island divertor. The 5/5 edge consists of five individual islands that are unconnected. In contrast, a single island connects onto itself after 6 or 4 toroidal transits in the 5/6 or 5/4 edge, respectively. Many interesting phenomena are related to these islands and diagnostic analyses require a mapping from ‘laboratory’ or real space coordinates to the island coordinate system (ICS). A procedure is described here to calculate several scalar and vector quantities for closed island structures which can be utilized in fast interpolation schemes for inverse maps. For the 5/5 edge, a fixed-boundary vacuum (zero beta) magneto-hydrodynamic solution of the 5/5 island is found with the Variational Moments Equilibrium Code, VMEC. The solution is compatible with already existing routines which determine the radial and binormal vectors of VMEC solutions at arbitrary laboratory coordinates. VMEC does not support solutions for the 5/4 and 5/6 islands, but the radial and binormal vectors are available in a local 2D Fourier ICS. Article in Journal/Newspaper Edge Island Single Island IOP Publishing Single Island ENVELOPE(68.667,68.667,-69.817,-69.817) Plasma Physics and Controlled Fusion 64 5 055022 |
institution |
Open Polar |
collection |
IOP Publishing |
op_collection_id |
crioppubl |
language |
unknown |
description |
Abstract The edge island domain in Wendelstein 7-X consists of divertor islands whose position coincide with the location of rational values of the rotational transform <?CDATA ${\textrm{-}}\mkern-6mu\iota \approx(5/6, 5/5, 5/4)$?> - ι ≈ ( 5 / 6 , 5 / 5 , 5 / 4 ) and surround the main confinement volume (the ‘main plasma’), providing the magnetic topology for an island divertor. The 5/5 edge consists of five individual islands that are unconnected. In contrast, a single island connects onto itself after 6 or 4 toroidal transits in the 5/6 or 5/4 edge, respectively. Many interesting phenomena are related to these islands and diagnostic analyses require a mapping from ‘laboratory’ or real space coordinates to the island coordinate system (ICS). A procedure is described here to calculate several scalar and vector quantities for closed island structures which can be utilized in fast interpolation schemes for inverse maps. For the 5/5 edge, a fixed-boundary vacuum (zero beta) magneto-hydrodynamic solution of the 5/5 island is found with the Variational Moments Equilibrium Code, VMEC. The solution is compatible with already existing routines which determine the radial and binormal vectors of VMEC solutions at arbitrary laboratory coordinates. VMEC does not support solutions for the 5/4 and 5/6 islands, but the radial and binormal vectors are available in a local 2D Fourier ICS. |
author2 |
EUROfusion Consortium Department of Energy |
format |
Article in Journal/Newspaper |
author |
Schmitt, J C Kriete, D M Andreeva, T Geiger, J Grahl, M Schilling, J Thomsen, H Flom, E |
spellingShingle |
Schmitt, J C Kriete, D M Andreeva, T Geiger, J Grahl, M Schilling, J Thomsen, H Flom, E Radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in W7-X |
author_facet |
Schmitt, J C Kriete, D M Andreeva, T Geiger, J Grahl, M Schilling, J Thomsen, H Flom, E |
author_sort |
Schmitt, J C |
title |
Radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in W7-X |
title_short |
Radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in W7-X |
title_full |
Radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in W7-X |
title_fullStr |
Radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in W7-X |
title_full_unstemmed |
Radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in W7-X |
title_sort |
radial coordinate maps, radial vectors, and binormal vectors for 5/6, 5/5 and 5/4 edge island domains in w7-x |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1088/1361-6587/ac5f3f https://iopscience.iop.org/article/10.1088/1361-6587/ac5f3f https://iopscience.iop.org/article/10.1088/1361-6587/ac5f3f/pdf |
long_lat |
ENVELOPE(68.667,68.667,-69.817,-69.817) |
geographic |
Single Island |
geographic_facet |
Single Island |
genre |
Edge Island Single Island |
genre_facet |
Edge Island Single Island |
op_source |
Plasma Physics and Controlled Fusion volume 64, issue 5, page 055022 ISSN 0741-3335 1361-6587 |
op_rights |
https://iopscience.iop.org/page/copyright https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1361-6587/ac5f3f |
container_title |
Plasma Physics and Controlled Fusion |
container_volume |
64 |
container_issue |
5 |
container_start_page |
055022 |
_version_ |
1802643751216087040 |