Implications of recent DIII-D experiments on plasma shaping for future tokamak designs

被引:8
|
作者
Petrie, TW
Fenstermacher, ME
Lasnier, CJ
机构
[1] Gen Atom Co, San Diego, CA 92186 USA
[2] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA USA
来源
FUSION TECHNOLOGY | 2001年 / 39卷 / 02期
关键词
D O I
10.13182/FST01-A11963357
中图分类号
TL [原子能技术]; O571 [原子核物理学];
学科分类号
0827 ; 082701 ;
摘要
Advanced tokamaks use D-shaped cross-section plasmas to optimize fusion performance. In turn, the divertor (which handles heat and particles) must operate efficiently in these shaped plasmas. In this paper, we report on recent experiments at the DIII-D National Fusion Facility that compare the advantages/disadvantages of I) double-null (DN) versus single-null (SN) configurations, 2) particle pumping at low and high density, and 3) open versus tightly baffled diverters. The focus of this paper will be on the important engineering consequences of these physics results for future tokamak designs. Accurate control over the magnetic balance is required by the plasma shaping coils for DN land near-DN) operation because of the strong sensitivity of the heat flux to small changes in magnetic balance. Alternatively, additional protective armor may be needed for each divertor. We show that precise control over the strike point location by the coil system is important for lower density (attached) plasma operation, but much less so for higher density (detached) operation. We also find that minimizing the angle between the divertor structure and the divertor plasma legs is very useful in reducing the peak divertor heat flux for lower density (attached) plasmas but is of Limited benefit for higher density (detached) plasmas. Finally, the physics results imply that significant heating and damage at the divertor "slot" opening may occur, even if several heat flux scrape-off lengths are allowed for clearance.
引用
收藏
页码:916 / 922
页数:7
相关论文
共 50 条
  • [21] Next-generation plasma control in the DIII-D tokamak
    Walker, ML
    Ferron, JR
    Humphreys, DA
    Johnson, RD
    Leuer, JA
    Penaflor, BG
    Piglowski, DA
    Ariola, M
    Pironti, A
    Schuster, E
    FUSION ENGINEERING AND DESIGN, 2003, 66-68 : 749 - 753
  • [22] Control of plasma poloidal shape and position in the DIII-D tokamak
    Walker, ML
    Humphreys, DA
    Ferron, JR
    PROCEEDINGS OF THE 36TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-5, 1997, : 3703 - 3708
  • [23] Development of burning plasma and advanced scenarios in the DIII-D tokamak
    Luce, TC
    NUCLEAR FUSION, 2005, 45 (10) : S86 - S97
  • [24] Backstepping Control of the Plasma Current Profile in the DIII-D Tokamak
    Boyer, Mark D.
    Barton, Justin
    Schuster, Eugenio
    Luce, Tim C.
    Ferron, John R.
    Walker, Michael L.
    Humphreys, David A.
    Penaflor, Ben G.
    Johnson, Robert D.
    2012 AMERICAN CONTROL CONFERENCE (ACC), 2012, : 2996 - 3001
  • [25] Plasma vertical stabilization with actuation constraints in the DIII-D tokamak
    Schuster, E
    Walker, ML
    Humphreys, DA
    Krstic, M
    AUTOMATICA, 2005, 41 (07) : 1173 - 1179
  • [26] ELECTRON-CYCLOTRON-CURRENT-DRIVE EXPERIMENTS IN THE DIII-D TOKAMAK
    JAMES, RA
    GIRUZZI, G
    DEGENTILE, B
    RODRIGUEZ, L
    HARVEY, R
    LOHR, J
    LUCE, TC
    MATSUDA, K
    MOELLER, CP
    PRATER, R
    SNIDER, R
    FYAKHRETDINOV, A
    GORELOV, Y
    TRUKHIN, V
    JANZ, S
    PHYSICAL REVIEW A, 1992, 45 (12): : 8783 - 8786
  • [27] Dust studies in DIII-D tokamak
    Rudakov, D. L.
    West, W. P.
    Groth, M.
    Yu, J. H.
    Boedo, J. A.
    Bray, B. D.
    Brooks, N. H.
    Fenstermacher, M. E.
    Hollmann, E. M.
    Hyatt, A. W.
    Krasheninnikov, S. I.
    Lasnier, C. J.
    Moyer, R. A.
    Pigarov, A. Yu.
    Smirnov, R.
    Solomon, W. M.
    Wong, C. P. C.
    MULTIFACETS OF DUSTY PLASMA, 2008, 1041 : 55 - +
  • [28] AN OPTIMIZATION OF BETA IN THE DIII-D TOKAMAK
    LAZARUS, EA
    LAO, LL
    OSBORNE, TH
    TAYLOR, TS
    TURNBULL, AD
    CHU, MS
    KELLMAN, AG
    STRAIT, EJ
    FERRON, JR
    GROEBNER, RJ
    HEIDBRINK, WW
    CARLSTROM, T
    HELTON, FJ
    HSIEH, CL
    LIPPMANN, S
    SCHISSEL, D
    SNIDER, R
    WROBLEWSKI, D
    PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1992, 4 (11): : 3644 - 3662
  • [29] Carbon sources in the DIII-D tokamak
    Isler, RC
    Colchin, RJ
    Brooks, NH
    Evans, TE
    West, WP
    Whyte, DG
    JOURNAL OF NUCLEAR MATERIALS, 2003, 313 : 873 - 877
  • [30] THE FISHBONE INSTABILITY IN THE DIII-D TOKAMAK
    HEIDBRINK, WW
    SAGER, G
    NUCLEAR FUSION, 1990, 30 (06) : 1015 - 1025