Impurity ion flow and temperature measured in a detached divertor with externally applied non-axisymmetric fields on DIII-D

Autor:	Joon-Wook Ahn, A.R. Briesemeister, Adam McLean, R.C. Isler, D. L. Hillis, S.L. Allen, M.E. Fenstermacher, Ezekial A Unterberg, W.H. Meyer
Rok vydání:	2015
Předmět:	Nuclear and High Energy Physics DIII-D Thomson scattering Chemistry Divertor Electron Plasma Resonant magnetic perturbations Magnetic field Flow velocity Materials Science(all) Nuclear Energy and Engineering Physics::Plasma Physics General Materials Science Atomic physics
Zdroj:	Journal of Nuclear Materials. 463:524-527
ISSN:	0022-3115
DOI:	10.1016/j.jnucmat.2014.11.031
Popis:	Externally applied non-axisymmetric magnetic fields are shown to have little effect on the impurity ion flow velocity and temperature as measured by the multichord divertor spectrometer in the DIII-D divertor for both attached and detached conditions. These experiments were performed in H-mode plasmas with the grad-B drift toward the target plates, with and without n = 3 resonant magnetic perturbations (RMPs). The flow velocity in the divertor is shown to change by as much as 30% when deuterium gas puffing is used to create detachment of the divertor plasma. No measurable changes in the C III flow were observed in response to the RMP fields for the conditions used in this work. Images of the C III emission are used along with divertor Thomson scattering to show that the local electron and C III temperatures are equilibrated for the conditions shown.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::191e2649c4e9e723ac45436a4ace720e Zobrazit plný text záznamu Full Text from ScienceDirect