Jarboe T R, Hamp W T, Marklin G J, Nelson B A, O'neill R G, Redd A J, Sieck P E, Smith R J, Wrobel J S
University of Washington, Seattle, Washington 98195-2250, USA.
Phys Rev Lett. 2006 Sep 15;97(11):115003. doi: 10.1103/PhysRevLett.97.115003.
A spheromak is formed for the first time using a new steady state inductive helicity injection method. Using two inductive injectors with odd symmetry and oscillating at 5.8 kHz, a steady state spheromak with even symmetry is formed and sustained through nonlinear relaxation. A spheromak with about 13 kA of toroidal current is formed and sustained using about 3 MW of power. This is a much lower power threshold for spheromak production than required for electrode-based helicity injection. Internal magnetic probe data, including oscillations driven by the injectors, agree with the plasma being in the Taylor state. The agreement is remarkable considering the only fitting parameter is the amplitude of the spheromak component of the state.
首次使用一种新的稳态感应螺旋度注入方法形成了球形马克。通过使用两个具有奇对称性且以5.8千赫兹振荡的感应注入器，形成了具有偶对称性的稳态球形马克，并通过非线性弛豫维持。使用约3兆瓦的功率形成并维持了一个具有约13千安环形电流的球形马克。这一比基于电极的螺旋度注入所需的球形马克产生功率阈值低得多。内部磁探针数据，包括由注入器驱动的振荡，与处于泰勒状态的等离子体相符。考虑到唯一的拟合参数是该状态的球形马克分量的幅度，这种相符程度非常显著。
