Heat flux management via advanced magnetic divertor configurations and divertor detachment

Journal Article · Wed Dec 03 00:00:00 EST 2014 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2014.11.099· OSTI ID:1302915

Koleman, Egemen ^[1]; Allen, S. L. ^[2]; Bray, B. D. ^[3]; Fenstermacher, M. E. ^[2]; Humphreys, D. A. ^[3]; Hyatt, A. W. ^[3]; Lasnier, C. J. ^[2]; Leonard, A. W. ^[3]; Makowski, M. A. ^[2]; McLean, A. G. ^[2]; Maingi, Rajesh ^[4]; Nazikian, R. ^[4]; Petrie, T. W. ^[3]; Soukhanovskii, V. A. ^[2]; Unterberg, Ezekial A. ^[5]

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1. Princeton Univ., NJ (United States)
2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
3. General Atomics, San Diego, CA (United States)
4. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The snowflake divertor (SFD) control and detachment control to manage the heat flux at the divertor are successfully demonstrated at DIII-D. In this paper, we present results of the development and implementation of these two heat flux reduction control methods. The SFD control algorithm calculates the position of the two null-points in real-time and controls shaping coil currents to achieve and stabilize various snowflake configurations. Finally, detachment control stabilizes the detachment front fixed at specified distance between the strike point and the X-point throughout the shot.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-00OR22725; AC02-09CH11466; AC52-07NA27344; FC02-04ER54698
• OSTI ID: 1302915
• Journal Information: Journal of Nuclear Materials, Vol. 463; ISSN 0022-3115
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
97 MATHEMATICS AND COMPUTING