Radiative snowflake divertor studies in DIII-D

V. A. Soukhanovskii, S. L. Allen, M. E. Fenstermacher, D. N. Hill, C. J. Lasnier, M. A. Makowski, A. G. Mclean, W. H. Meyer, E. Kolemen, R. J. Groebner, A. W. Hyatt, A. W. Leonard, T. H. Osborne, T. W. Petrie

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Abstract Recent DIII-D experiments assessed the snowflake divertor (SF) configuration in a radiative regime in H-mode discharges with D2 seeding. The SF configuration was maintained for many energy confinement times (2-3 s) in H-mode discharges (Ip=1.2 MA, PNBI=4-5 MW, and B× ∇B down (favorable direction toward the divertor)), and found to be compatible with high performance operation (H98y2 ≥ 1). The two studied SF configurations, the SF-plus and the SF-minus, have a small finite distance between the primary X-point and the secondary Bp null located in the private flux region or the common flux region, respectively. In H-mode discharges with the SF configurations (cf. H-mode discharges with the standard divertor with similar conditions) the stored energy lost per the edge localized mode (ELM) was reduced, and significant divertor heat flux reduction between and during ELMs was observed over a range of collisionalities, from lower density conditions toward a higher density H-modes with the radiative SF divertor.

Original languageEnglish (US)
Article number48783
Pages (from-to)1191-1195
Number of pages5
JournalJournal of Nuclear Materials
Volume463
DOIs
StatePublished - Jul 22 2015

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Fingerprint Dive into the research topics of 'Radiative snowflake divertor studies in DIII-D'. Together they form a unique fingerprint.

  • Cite this

    Soukhanovskii, V. A., Allen, S. L., Fenstermacher, M. E., Hill, D. N., Lasnier, C. J., Makowski, M. A., Mclean, A. G., Meyer, W. H., Kolemen, E., Groebner, R. J., Hyatt, A. W., Leonard, A. W., Osborne, T. H., & Petrie, T. W. (2015). Radiative snowflake divertor studies in DIII-D. Journal of Nuclear Materials, 463, 1191-1195. [48783]. https://doi.org/10.1016/j.jnucmat.2014.12.052