C-13 transport studies in L-mode divertor plasmas on DIII-D
2005 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 337-39, no 03-jan, 30-34 p.Article in journal (Refereed) Published
(CH4)-C-13 was injected with a toroidally-symmetric gas system into 22 identical lower-single-null L-mode discharges on DIII-D. The injection level was adjusted so that it did not significantly perturb the core or divertor plasmas, with a duration of similar to 3 s on each shot, for a total of similar to 300 T L of injected particles. The plasma shape remained very constant; the divertor strike points were controlled to similar to 1 cm at the divertor plate. At the beginning of the subsequent machine vent, 29 carbon tiles were removed for nuclear reaction analysis of C-13 content to determine regions of carbon deposition. It was found that only the tiles inboard of the inner strike point had appreciable 1 3 C above background. Visible spectroscopy measurements of the carbon injection and comparisons with modeling are consistent with carbon transport by means of scrape-off layer flow.
Place, publisher, year, edition, pages
2005. Vol. 337-39, no 03-jan, 30-34 p.
DIII-D, divertor plasma, re-deposition, impurity transport
IdentifiersURN: urn:nbn:se:kth:diva-14616DOI: 10.1016/j.jnucmat.2004.09.066ISI: 000227789500006ScopusID: 2-s2.0-13844321124OAI: oai:DiVA.org:kth-14616DiVA: diva2:332657
QC 20100525 QC 20111012. 16th International Conference on Plasma Surface Interactions in Controlled Fusion Devices. Portland, ME. MAY 24-28, 2004 2010-08-052010-08-052011-10-12Bibliographically approved