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首页> 外文期刊>Nuclear fusion >Collisionality and safety factor scalings of H-mode energy transport in the MAST spherical tokamak
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Collisionality and safety factor scalings of H-mode energy transport in the MAST spherical tokamak

机译：MAST球形托卡马克中H型能量传输的碰撞性和安全因子标度

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摘要

A factor of 4 dimensionless collisionality scan of H-mode plasmas in MAST shows that the thermal energy confinement time scales as Bτ_(E,th) α v-*e~(0.82±0.1). Local heat transport is dominated by electrons and is consistent with the global scaling. The neutron rate is in good agreement with the v* dependence of τ_(E,th)- The gyrokinetic code GYRO indicates that micro-tearing turbulence might explain such a trend. A factor of 1.4 dimensionless safety factor scan shows that the energy confinement time scales as τ_(E,th) α q_(eng)~(-0.85±102)These two scalings are consistent with the dependence of energy confinement time on plasma current and magnetic field. Weaker q_(eng) and stronger v* dependences compared with the IPB98y2 scaling could be favourable for an ST-CTF device, in that it would allow operation at lower plasma current.
机译：在MAST中对H型等离子体进行4次无因次碰撞扫描的因子表明，热能约束时间的尺度为Bτ_（E，th）αv- * e〜（0.82±0.1）。局部热传递主要由电子控制，与整体尺度一致。中子速率与τ_（E，th）的v *依赖关系很好。陀螺动力学代码GYRO表示微撕裂湍流可以解释这种趋势。 1.4无因次安全系数扫描显示能量限制时间标度为τ_（E，th）αq_（eng）〜（-0.85±102），这两个标度与能量限制时间对等离子电流和磁场。与IPB98y2缩放相比，较弱的q_（eng）和更强的v *依赖性对于ST-CTF器件可能是有利的，因为它将允许在较低的等离子体电流下运行。

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  • 来源
    《Nuclear fusion》 |2011年第7期|p.47.1-47.9|共9页
  • 作者

    M. Valovic; R. Akers; M. de Bock; J. McCone; L. Garzotti; C. Michael; G. Naylor; A. Patel; C.M. Roach; R. Scannell; M. Turnyanskiy; M. Wisse; W. Guttenfelder; J. Candy;

  • 作者单位

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland;

    Princeton Plasma Physics Laboratory, Princeton University, Princeton, NJ 08543, USA;

    General Atomics, PO Box 85608, San Diego, CA 92186-5608, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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