Overview of physics results from MAST
Overview of physics results from MAST
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MAST 物理结果概述
DOI：
10.1088/0029-5515/51/9/094013
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发表时间：
2011
期刊：
影响因子：
3.3
通讯作者：
Lloyd B
中科院分区：
文献类型：
--
作者：
Lloyd B
Mega Amp球形托卡马克（MAST）的重大发展使ITER的支持和基于球形托卡马克（ST）的组件测试设施（CTF）的物理基础取得了重要进展，并为潜在的托卡马克物理提供了新的见解。例如，L-H转换研究得益于基座轮廓演变（温度、密度和径向电场）的高时空分辨率测量，为了支持基座稳定性研究，边缘电流密度分布已经从运动斯塔克效应测量中推断出来。在MAST中研究了q-剖面和ex - B流动剪切对输运的影响，并将平衡流动剪切纳入陀螺动力学规范，以改善与实验数据的比较。与IPB98 （y, 2）标度相比，h模对热扩散率的q依赖性较弱，对碰撞依赖性较强，这可能对st基CTF的设计具有重要意义。通过使用内部和外部线圈施加共振磁扰动（RMPs），已经证明了ELM缓解是ITER的一个重要问题，但尚未观察到i型ELM的完全稳定。模型显示了包括等离子体对RMP场响应的重要性。具有q>1和弱中心磁剪切的MAST等离子体有规律地表现出长寿命的饱和理想内模。在这种模式下测量的等离子体制动与新古典环面粘度理论比较好。为了支持基本的物理理解，高分辨率汤姆逊散射测量为锯齿状碰撞动力学和新古典撕裂模式临界岛宽度提供了新的见解。延迟场分析仪的测量结果显示，在l模等离子体的刮擦层中离子温度升高，在i型elm存在的情况下，在分离矩阵外20厘米处检测到能量大于500 eV的离子。大量注气减少了分流器热负荷，减少了70%。
Major developments on the Mega Amp Spherical Tokamak (MAST) have enabled important advances in support of ITER and the physics basis of a spherical tokamak (ST) based component test facility (CTF), as well as providing new insight into underlying tokamak physics. For example, L–H transition studies benefit from high spatial and temporal resolution measurements of pedestal profile evolution (temperature, density and radial electric field) and in support of pedestal stability studies the edge current density profile has been inferred from motional Stark effect measurements. The influence of the q-profile and E× B flow shear on transport has been studied in MAST and equilibrium flow shear has been included in gyro-kinetic codes, improving comparisons with the experimental data. H-modes exhibit a weaker q and stronger collisionality dependence of heat diffusivity than implied by IPB98 (y, 2) scaling, which may have important implications for the design of an ST-based CTF. ELM mitigation, an important issue for ITER, has been demonstrated by applying resonant magnetic perturbations (RMPs) using both internal and external coils, but full stabilization of type-I ELMs has not been observed. Modelling shows the importance of including the plasma response to the RMP fields. MAST plasmas with q> 1 and weak central magnetic shear regularly exhibit a long-lived saturated ideal internal mode. Measured plasma braking in the presence of this mode compares well with neo-classical toroidal viscosity theory. In support of basic physics understanding, high resolution Thomson scattering measurements are providing new insight into sawtooth crash dynamics and neo-classical tearing mode critical island widths. Retarding field analyser measurements show elevated ion temperatures in the scrape-off layer of L-mode plasmas and, in the presence of type-I ELMs, ions with energy greater than 500 eV are detected 20 cm outside the separatrix. Disruption mitigation by massive gas injection has reduced divertor heat loads by up to 70%.
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影响因子：
2.2
作者：
P. Lang;B. Alper;L. Baylor;M. Beurskens;J. Cordey;R. Dux;R. Felton;L. Garzotti;G. Haas;L. Horton;S. Jachmich;T. Jones;A. Lorenz;P. Lomas;M. Maraschek;H. W. Müller;J. Ongena;J. Rapp;K. Renk;M. Reich;R. Sartori;G. Schmidt;M. Stamp;W. Suttrop;E. Villedieu;D. Wilson
通讯作者：
P. Lang;B. Alper;L. Baylor;M. Beurskens;J. Cordey;R. Dux;R. Felton;L. Garzotti;G. Haas;L. Horton;S. Jachmich;T. Jones;A. Lorenz;P. Lomas;M. Maraschek;H. W. Müller;J. Ongena;J. Rapp;K. Renk;M. Reich;R. Sartori;G. Schmidt;M. Stamp;W. Suttrop;E. Villedieu;D. Wilson
低纵横比国家球形环面实验 (NSTX) 中的能量约束缩放
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
S. Kaye;M. Bell;R. Bell;E. Fredrickson;B. LeBlanc;K. Lee;S. Lynch;S. Sabbagh
通讯作者：
S. Sabbagh
纵横比和 beta 在 H 模式限制尺度中的作用
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
S. Kaye;M. Valovic;A. Chudnovskiy;J. Cordey;D. McDonald;A. Meakins;K. Thomsen;R. Akers;G. Bracco;C. Brickley;C. Bush;A. Côté;J. Deboo;M. Greenwald;G. Hoang;D. Hogweij;F. Imbeaux;Y. Kamada;O. Kardaun;A. Kus;S. Lebedev;V. Leonov;S. Lynch;Y. Martin;Y. Miura;J. Ongena;G. Pacher;C. Petty;M. Romanelli;F. Ryter;K. Shinohara;J. Snipes;J. Stober;T. Takizuka;K. Tsuzuki;H. Urano
通讯作者：
H. Urano
改进的颗粒-等离子体相互作用的中性气体屏蔽模型
影响因子：
1.5
作者：
S. Milora;C. A. Foster
通讯作者：
C. A. Foster
1 EX / P 6-26 当前 MAST 调剖研究
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
M. Turnyanskiy;D. Keeling;R. Akers;G. Cunningham;H. Meyer;S. Pinches
通讯作者：
S. Pinches