Bulletin of the American Physical Society
60th Annual Meeting of the APS Division of Plasma Physics
Volume 63, Number 11
Monday–Friday, November 5–9, 2018; Portland, Oregon
Session BP11: Poster Session I: HEDP; General Stellarator; Wendelstein 7-X; Heating, Current Drive, and Energetic Ions (9:30am-12:30pm)
Monday, November 5, 2018
OCC
Room: Exhibit Hall A1&A
Abstract ID: BAPS.2018.DPP.BP11.62
Abstract: BP11.00062 : Scraper Element Observations in the W7-X Stellarator*
Abstract 
Presenter:
Glen A. Wurden
(Los Alamos National Laboratory)
Authors:
Glen A. Wurden
(Los Alamos National Laboratory)
Jeremy Lore
(Oak Ridge National Laboratory)
Victoria Winters
(U of Wisconsin, Madison)
Peter Drewelow
(Max Planck Inst Plasmaphysik)
Marcin Jakubowski
(Max Planck Inst Plasmaphysik)
Kenneth Hammond
(Max Planck Inst Plasmaphysik)
Holger Niemann
(Max Planck Inst Plasmaphysik)
Joris Fellinger
(Max Planck Inst Plasmaphysik)
Adnan Ali
(Max Planck Inst Plasmaphysik)
Christoph Biedermann
(Max Planck Inst Plasmaphysik)
Simppa Akaslompolo
(Max Planck Inst Plasmaphysik)
Alexandra LeViness
(Princeton University)
and the W7X Team
(Max Planck Inst Plasmaphysik)
We report on plasma interactions with the new graphite scraper element in Module 5 of the Wendelstein 7-X stellarator during the recent OP1.2b campaign in 2018. Infrared and filtered visible imaging [1], spectroscopy, Langmuir probes and thermocouples provide a suite of measurements to compare a variety of plasma configurations, including a specially designed “high-beta mimic” configuration to put up to 10 MW/m^2 on the scraper element. Additionally, we looked for localized low-level hot spots with the new high-resolution IR capability, due to expected localized lost fast hydrogen ions injected from the new neutral beam injection (NBI) system.
[1] G. A. Wurden, et al, Rev. Sci. Instruments 2018
*Supported by the US-DOE/IPP collaboration under DOE LANS Contract DE-AC52-06NA25396, and carried out within the framework of the EUROfusion Consortium, with funding from the H2020 Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.BP11.62
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