Roles of bumpy field on collisionless particle confinement in helical axis heliotrons
Roles of bumpy field on collisionless particle confinement in helical axis heliotrons
复制标题
凹凸场对螺旋轴日光管中无碰撞粒子限制的作用
DOI：
10.1088/0029-5515/40/2/309
复制
发表时间：
2000
期刊：
影响因子：
3.3
通讯作者：
M. Wakatani
中科院分区：
文献类型：
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作者：
M. Yokoyama;N. Nakajima;M. Okamoto;Y. Nakamura;M. Wakatani
本文用Boozer坐标系下的模型磁场和粒子轨道计算方法研究了“颠簸”场对螺旋轴太阳电子管中无碰撞粒子约束的作用。国防部？Bmin轮廓可以在控制颠簸场的情况下在大半径方向上移位，其中Bmin是|B|在一个场周期内的环形方向上。封闭式模？Bmin轮廓是一个有用的措施，以评估全球无碰撞粒子约束，只要模？Bmin轮廓环形连接。凹凸分量与螺旋度分量之比的负值有助于获得最大的闭合模面积。Bmin的轮廓之间的环形分量和螺旋度分量的一个有限的比率。的径向增加颠簸的领域有助于实现一个环形局部模？Bmin结构。它还产生了一个区域，该区域具有|B|相对于环形磁通量，这是很好地对准的环形局部模？Bmin结构。这增强了引导中心轨道的大的极向漂移，而径向漂移不受影响，有效地改善了粒子约束。
The roles of `bumpy' field on collisionless particle confinement in helical axis heliotrons are investigated with model magnetic field and particle orbit calculations in Boozer co-ordinates. The mod?Bmin contours can be shifted in the major radius direction with control of the bumpy field, where Bmin is the minimum value of |B| in the toroidal direction within one field period. The area of closed mod?Bmin contours is a useful measure with which to evaluate global collisionless particle confinement as long as the mod?Bmin contours connect toroidally. The negative value of the ratio between the bumpy component and the helicity component contributes to obtaining the largest area of closed mod?Bmin contours for a finite ratio between the toroidicity component and the helicity component. The radially increasing bumpy field contributes to the realization of a toroidally localized mod?Bmin structure. It also produces a region with a large derivative of |B| with respect to the toroidal magnetic flux, which is well aligned to the toroidally localized mod?Bmin structure. This enhances the large poloidal drift of the guiding centre orbits, while the radial drift is unaffected, effectively improving the particle confinement.
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
伊藤公隆：等离子体物理学和受控聚变。31。（1989）
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