Sensitivity of injected argon behavior to changes in magnetic balance in double-null plasmas in DIII-D

T. W. Petrie*, N. H. Brooks, M. E. Fenstermacher, M. Groth, A. W. Hyatt, C. J. Lasnier, A. W. Leonard, G. D. Porter, M. J. Schaffer, M. R. Wade, J. G. Watkins, W. P. West

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

2 Sitaatiot (Scopus)

Abstrakti

Recent DIII-D experiments show that both magnetic balance and particle drifts are important to understanding how argon impurities accumulate in balanced and unbalanced double-null plasmas during 'puff and pump' radiating divertor operation. Unbalanced double-null shapes, which are biased in the direction opposite to the ion B × ∇ B drift direction, have produced the best result to-date in terms of coupling a radiating divertor approach with an H-mode plasma. The proximity to balanced double-null that can be used for puff-and-pump may depend on the width of the heat flux profile in the scrape-off layer. A comparison of plasma behavior in the open lower divertor to that of the more closed upper divertor determined that plasma density control was far more sensitive to the ion B × ∇ B drift direction than to the relative closure of the divertor.

AlkuperäiskieliEnglanti
Sivut242-245
Sivumäärä4
JulkaisuJournal of Nuclear Materials
Vuosikerta390-391
DOI - pysyväislinkit
TilaJulkaistu - 15 kesäkuuta 2009
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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