Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System
Shafranov shift in the low aspect ratio heliotron/torsatron Compact Helical System
复制标题
低展弦比日射管/托萨管紧凑螺旋系统中的沙夫拉诺夫位移
DOI：
10.1088/0029-5515/32/1/i03
复制
发表时间：
1992
期刊：
影响因子：
3.3
通讯作者：
D. Lee
中科院分区：
文献类型：
--
作者：
H. Yamada;K. Ida;H. Iguchi;S. Morita;O. Kaneko;H. Arimoto;M. Hosokawa;H. Idei;S. Kubo;K. Matsuoka;K. Nishimura;S. Okamura;Y. Takeiri;Y. Takita;C. Takahashi;K. Hanatani;H. Howe;S. Hirshman;D. Lee
在紧凑螺旋系统(CHS)-低长径比（Ap ~ 5）的heliotron/torsatron中实验研究了中性束加热等离子体的MHD平衡特性。这种构型的特点是螺旋对称的强烈断裂。通过各种诊断测量的径向轮廓显示出由于等离子体压力引起的显著的沙弗拉诺夫位移。磁轴与真空位置的偏差已达到小半径的50%。用三维平衡码VMEC根据实验数据重建平衡，结果与实验观测到的沙弗拉诺夫位移以及β≤1.2%和β0≤3.3%等离子体中的抗磁压力符合得很好。该β值对应于沙弗拉诺夫位移定义的常规平衡β极限的一半，达到小半径的一半。虽然切向中性束注入引起压力各向异性，p||/p⊥≤3，但假设各向同性压力的平衡描述与实验一致
The MHD equilibrium properties of neutral beam heated plasmas have been experimentally investigated in the Compact Helical System (CHS)-a low aspect ratio (Ap ~ 5) heliotron/torsatron. This configuration is characterized by a strong breaking of helical symmetry. The radial profiles measured by various diagnostics have shown a significant Shafranov shift due to the plasma pressure. The deviation of the magnetic axis from is vacuum position has become as large as 50% of the minor radius. When the three-dimensional equilibrium code VMEC is used to reconstruct the equilibrium from the experimental data, the result is in good agreement with the experimentally observed Shafranov shift as well as with the diamagnetic pressure in plasmas with β ≤ 1.2% and β0 ≤ 3.3%. This beta values corresponds to half of the conventional equilibrium β limit defined by the Shafranov shift reaching a value of half of the minor radius. Although tangential neutral beam injection causes pressure anisotropies, p||/p⊥ ≤ 3, the description of the equilibrium assuming isotropic pressure is consistent with the experiment
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